- treadwelli, Eulima treadwelli F.W. Hutton, 1885 † - (EULIMIDAE) (FOSSIL)
- trebicianum, Zospeum trebicianum A. Stossich, 1899 - (ELLOBIIDAE)
- trebnikanum, Paladilhiopsis robiciana trebnikanum (R. Slapnik, 1995) - (MOITESSIERIIDAE)
- trebotovensis, Neoparaliospira trebotovensis Frýda, 1998 † - (GOSSELETINIDAE) (FOSSIL)
- Trecanolia, Genus Trecanolia Ratter & Cope, 1998 † (FREJIDAE) (FOSSIL)
- trecchi, Pleurotoma trecchi D.M. Testa, 1842 - syn of: Drilliola loprestiana (P. Calcara, 1841) - (TURRIDAE)
- trecchinensis, Helix trecchinensis W. Kobelt, 1906 - syn of: Ambigua fuscolabiata saprensis (W. Kobelt, 1904) - (HELICIDAE)
- Trechmannella, syn of: Genus Dictyoptychus Douvillé, 1905 † (TRECHMANNELLIDAE) (FOSSIL)
- TRECHMANNELLIDAE Cox, 1934 † - Family (BIVALVIA-HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-HIPPURITIDA [Order]-RADIOLITOIDEA [Superfamily]) (FOSSIL)
- trechmanni, Maitaia trechmanni J. Marwick, 1934 † - (ATOMODESMATIDAE) (FOSSIL)
- trechmanni, Cenoceras trechmanni Kummel, 1953 † - (CENOCERATIDAE) (FOSSIL)
- trechmanni, Mytilus trechmanni C.O. Waterhouse, 1960 † - syn of: Manticula problematica (C.A. von Zittel, 1864 †) - (MYTILIDAE) (FOSSIL)
- trechmanni, Plagioptychus trechmanni Chubb, 1956 † - (PLAGIOPTYCHIDAE) (FOSSIL)
- trechmanni, Talantodiscus trechmanni J. Marwick, 1953 † - (PLEUROTOMARIIDAE) (FOSSIL)
- trechmanni, Avicularium trechmanni Cox, 1941 † - (TRIDACNIDAE) (FOSSIL)
- trechmanni, Maoritrigonia trechmanni Fleming, 1987 † - (TRIGONIIDAE) (FOSSIL)
- trechmanni, Enaeta trechmanni P.O. Jung, 1971 † - (VOLUTIDAE) (FOSSIL)
- trecostatum, Buccinum trecostatum R. Tiba, 1980 - syn of: Buccinum trescostatum R. Tiba, 1980 - (BUCCINIDAE)
- tredi, Sitala tredi E. Fischer-Piette, Ch.P. Blanc, F. Blanc & F. Salvat, 1994 - (ARIOPHANTIDAE)
- treffortensis, Viviparus treffortensis Delafond & Depéret, 1893 † - (VIVIPARIDAE) (FOSSIL)
- tregoi, Arctohungarites tregoi Bucher, 1992 † - (LONGOBARDITIDAE) (FOSSIL)
- tregoi, Silberlingites tregoi Bucher, 1989 † - (SIBIRITIDAE) (FOSSIL)
- tregorum, Gymnites tregorum Silberling & Nichols, 1982 † - (GYMNITIDAE) (FOSSIL)
- treina, Parodostomia treina (E. Saurin, 1959) - (PYRAMIDELLIDAE)
- treina, Odostomia treina E. Saurin, 1959 - syn of: Parodostomia treina (E. Saurin, 1959) - (PYRAMIDELLIDAE)
- trekensis, Ceraunocochlis trekensis Erwin, 1988 † - (MEEKOSPIRIDAE) (FOSSIL)
- Trelania, syn of: Subgenus Sigapatella (Bicatillus) Swainson, 1840 † (CALYPTRAEIDAE) (FOSSIL)
- trelissickensis, Notadusta trelissickensis (H.H. Suter, 1917 †) - (CYPRAEIDAE) (FOSSIL)
- trelissickensis, Glycymeris trelissickensis J. Marwick, 1923 † - (GLYCYMERIDIDAE) (FOSSIL)
- trema, Narona trema A.A. Olsson, 1932 † - (CANCELLARIIDAE) (FOSSIL)
- Tremagyrus, syn of: Genus Tremanotus Hall, 1868 † (BUCANIIDAE) (FOSSIL)
- TREMANOTIDAE - syn of Family: BUCANIIDAE (FOSSIL)
- Tremanotus, Genus Tremanotus Hall, 1868 † (BUCANIIDAE) (FOSSIL)
- tremarieri, Natica tremarieri R. Tate, 1900 † - (NATICIDAE) (FOSSIL)
- Trematiconcha, Subgenus Pseudomonotis (Trematiconcha) Skwarko, 1988 † (PSEUDOMONOTIDAE) (FOSSIL)
- Trematoceras, Genus Trematoceras Eichwald, 1851 † (ORTHOCERATIDAE) (FOSSIL)
- Trematodiscus, Genus Trematodiscus Haeckel, 1860 † (NAUTILIDA (UNASSIGNED)) (FOSSIL)
- trematoides, Cephalopyge trematoides (C. Chun, 1889) - (PHYLLIROIDAE)
- Trematonotus, syn of: Genus Tremanotus Hall, 1868 † (BUCANIIDAE) (FOSSIL)
- trematus, Granoconus trematus Yü, 1979 † - (MOLLUSCA INCERTAE SEDIS) (FOSSIL)
- tremenda, Eopleurotoma tremenda M.E.A. de Boury, 1899 † - (TURRIDAE) (FOSSIL)
- tremesia, Trochoidea tremesia J.R. Bourguignat in É.A.A. Locard, 1894 - syn of: Trochoidea pyramidata (J.P.R. Draparnaud, 1805) - (HYGROMIIDAE)
- tremeza, Cypraea tremeza P.L. Duclos, 1833 - syn of: Purpurcapsula exigua (J.E. Gray, 1831) - (CYPRAEIDAE)
- tremeza, Trivia tremeza (P.L. Duclos, 1833) - (TRIVIIDAE)
- TREMOCTOPODIDAE Tryon, 1879 - Family (CEPHALOPODA-COLEOIDEA [Subclass]-OCTOPODIFORMES [Superorder]-OCTOPODA [Order]-INCIRRATA [Suborder]-ARGONAUTOIDEA [Superfamily])
- Tremoctopus, Genus Tremoctopus S. Delle Chiaje, 1830 (TREMOCTOPODIDAE)
- trempealeauense, Woosteroceras trempealeauense Ulrich & al., 1944 † - (ELLESMEROCERATIDAE) (FOSSIL)
- trempensis, Melanopsis trempensis K. Bandel, 2000 † - (MELANOPSIDAE) (FOSSIL)
- trempensis, Torallochus trempensis S. Kiel & K. Bandel, 2002 † - (TURBINIDAE) (FOSSIL)
- tremperi, Opalia tremperi P. Bartsch, 1927 - syn of: Opalia infrequens (C.B. Adams, 1852) - (EPITONIIDAE)
- tremperi, Murex tremperi W.H. Dall, 1910 - syn of: Pteropurpura macroptera tremperi W.H. Dall, 1910 - (MURICIDAE)
- tremperi, Pteropurpura macroptera tremperi W.H. Dall, 1910 - (MURICIDAE)
- tremperi, Odostomia tremperi P. Bartsch, 1927 - (PYRAMIDELLIDAE)
- tremperiana, Bathytoma tremperiana W.H. Dall, 1911 - syn of: Megasurcula tremperiana (W.H. Dall, 1911) - (BORSONIIDAE)
- tremperiana, Megasurcula tremperiana (W.H. Dall, 1911) - (PSEUDOMELATOMIDAE)
- tremperianus, Conus tremperianus W.H. Dall, 1911 - syn of: Megasurcula carpenteriana (W.M. Gabb, 1865) - (CONIDAE)
- Trempotamides, Genus Trempotamides Dominici & Kowalke, 2014 † (POTAMIDIDAE) (FOSSIL)
- tremulans, Napaeus tremulans A. Mousson, 1858 - (ENIDAE)
- tremulans, Morphotropis tremulans J. Perner, 1903 † - (ORIOSTOMATIDAE) (FOSSIL)
- tremulans, Oriostoma tremulans J. Perner, 1903 † - (ORIOSTOMATIDAE) (FOSSIL)
- tremulina, Miniaceoliva tremulina (J.B.P.A. Lamarck, 1811) - (OLIVIDAE)
- tremulina azemula, Miniaceoliva tremulina azemula (P.L. Duclos, 1835) - (OLIVIDAE)
- tremulina flammeacolor, Miniaceoliva tremulina flammeacolor E.J. Petuch & D.M. Sargent, 1986 - syn of: Miniaceoliva flammeacolor E.J. Petuch & D.M. Sargent, 1986 - (OLIVIDAE)
- tremulina fumosa, Oliva tremulina fumosa F.P. Marrat, 1871 - syn of: Oliva irisans fumosa F.P. Marrat, 1871 - (OLIVIDAE)
- tremulina nobilis, Miniaceoliva tremulina nobilis (L.A. Reeve, 1850) - (OLIVIDAE)
- tremulina tenebrosa, Miniaceoliva tremulina tenebrosa (F.P. Marrat, 1871) - (OLIVIDAE)
- trenberthae, Notocypraea comptonii trenberthae W.P. Trenberth, 1961 - (CYPRAEIDAE)
- trenberthi, Sclerodoris trenberthi (R.F. Burn, 1962) - (DISCODORIDIDAE)
- trencaleonis, Radix trencaleonis J. Gassies - syn of: Radix auricularia (C. Linnaeus, 1758) - (LYMNAEIDAE)
- trencarti, Lautoconus trencarti F. Nolf & J. Verstraeten, 2008 - (CONIDAE)
- trencarti, Crassispira trencarti P. Ryall, J. Horro & E. Rolán, 2009 - (PSEUDOMELATOMIDAE)
- Trenchia, Genus Trenchia J. Knudsen, 1964 (SEGUENZIOIDEA (UNASSIGNED))
- Trenella, Genus Trenella Parkhaev, 2001 † (TRENELLIDAE) (FOSSIL)
- TRENELLIDAE Parkhaev, 2001 † - Family (HELCIONELLOIDA-ARCHAEOBRANCHIA [Subclass]-HELCIONELLIFORMES [Order]-YOCHELCIONELLOIDEA [Superfamily]) (FOSSIL)
- trenholmii, Scaphella trenholmii M. Tuomey & Holmes, 1857 † - (VOLUTIDAE) (FOSSIL)
- trenquelleonis, Helminthoglypta trenquelleonis J.P.S. Grateloup, 1851 - syn of: Epiphragmophora tranquelleonis (J.P.S. Grateloup, 1851) - (HELMINTHOGLYPTIDAE)
- trentensis, Cyclocardia trentensis Ward, 1992 † - (CARDITIDAE) (FOSSIL)
- trentensis, Rebeccapecten trentensis (G.F. Harris, 1919 †) - (PECTINIDAE) (FOSSIL)
- trentonense, Cameroceras trentonense T.A. Conrad, 1842 † - (ENDOCERATIDAE) (FOSSIL)
- trentonensis, Archinacella trentonensis (Billings, 1865 †) - (ARCHINACELLIDAE) (FOSSIL)
- trentonensis, Cyrtolites trentonensis T.A. Conrad, 1842 † - (CYRTOLITIDAE) (FOSSIL)
- trentonensis, Omospira trentonensis Ulrich & Scofield, 1897 † - (LOXONEMATIDAE) (FOSSIL)
- trentonensis, Hormotoma trentonensis Ulrich & Scofield, 1897 † - - syn of: Omospira trentonensis Ulrich & Scofield, 1897 † - (MURCHISONIIDAE) (FOSSIL)
- trentonensis crassa, Omospira trentonensis crassa Wilson, 1951 † - (LOXONEMATIDAE) (FOSSIL)
- trentonensis plana, Omospira trentonensis plana Wilson, 1951 † - (LOXONEMATIDAE) (FOSSIL)
- treosaetes, Cuspidaria treosaetes W.H. Dall, 1925 - syn of: Cuspidaria trosaetes W.H. Dall, 1925 - (CUSPIDARIIDAE)
- trepana, Dentalium trepana Unknown - (DENTALIIDAE)
- trepidans, Cyclonema trepidans J. Perner, 1903 † - (PLATYCERATIDAE) (FOSSIL)
- trepidula, Cernuella trepidula G. Servain in G. Coutagne, 1881 - syn of: Cernuella neglecta (J.P.R. Draparnaud, 1805) - (HYGROMIIDAE)
- trepidulina, Cernuella trepidulina É.A.A. Locard, 1891 - syn of: Cernuella neglecta (J.P.R. Draparnaud, 1805) - (HYGROMIIDAE)
- trepidum, Calliostoma trepidum C. Hedley, 1907 - syn of: Laetifautor deceptus (E.A. Smith, 1899) - (CALLIOSTOMATIDAE)
- treponema, Murchisonia treponema Whidborne, 1892 † - (MURCHISONIIDAE) (FOSSIL)
- Trepospira, Genus Trepospira Ulrich & Scofield, 1897 † (EOTOMARIIDAE) (FOSSIL)
- Trepsipleura, Genus Trepsipleura Kues, 2002 † (PALAEOSTYLIDAE) (FOSSIL)
- Treptocceras, syn of: Genus Treptoceras Flower, 1942 † (PROTEOCERATIDAE) (FOSSIL)
- Treptoceras, Genus Treptoceras Flower, 1942 † (PROTEOCERATIDAE) (FOSSIL)
- tresanensis, Delphinella tresanensis (Le Hegarat, 1971 †) - (NEOCOMITIDAE) (FOSSIL)
- tresannensis, Delphinella tresannensis Le Hégarat, 1973 † - syn of: Pseudoneocomites retowskyi (Sarasin & Schönderlmayer, 1901 †) - (NEOCOMITIDAE) (FOSSIL)
- trescavicensis, Herilla pavlovici trescavicensis (A.J. Wagner, 1914) - (CLAUSILIIDAE)
- trescostatum, Buccinum trescostatum R. Tiba, 1980 - (BUCCINIDAE)
- Tresia, Genus Tresia J.L. van Goethem, 1975 (UROCYCLIDAE)
- tresmariae, Orthalicus sphinx tresmariae A.S.H. Breure, 2013 - (ORTHALICIDAE)
- Tresus, Genus Tresus J.E. Gray, 1853 (MACTRIDAE)
- Tretoceras, Genus Tretoceras Salter, 1958 † (ORTHOCERATIDAE) (FOSSIL)
- Tretospira, Genus Tretospira Koken, 1892 † (PURPURINIDAE) (FOSSIL)
- Trettinoceras, Genus Trettinoceras Nassichuk , 1975 † (SCHISTOCERATIDAE) (FOSSIL)
- treubi, Tylotoechus treubi (O. Böttger, 1890) - (PUPINIDAE)
- treva, Anachis treva (F.C. Baker, G.D. Hanna & A.M. Strong, 1939) - (COLUMBELLIDAE)
- trevallynense, Beyrichoceras trevallynense J. Brown & al., 1964 † - (MAXIGONIATITIDAE) (FOSSIL)
- trevelliana, Clavatula trevelliana J. Brown, 1827 - syn of: Curtitoma trevelliana (W. Turton, 1834) - (CLAVATULIDAE)
- trevelliana, Curtitoma trevelliana (W. Turton, 1834) - (MANGELIIDAE)
- trevelliana, Oenopota trevelliana O.A.L. Mörch, 1871 - syn of: Curtitoma trevelliana (W. Turton, 1834) - (MANGELIIDAE)
- trevelliana, Pleurotoma trevelliana W. Turton, 1834 - syn of: Curtitoma trevelliana (W. Turton, 1834) - (TURRIDAE)
- trevelliana smithii, Curtitoma trevelliana smithii (J.G. Jeffreys, 1877) - (MANGELIIDAE)
- trevellianum, Oenopota trevellianum W. Turton, 1834 - syn of: Curtitoma trevelliana (W. Turton, 1834) - (MANGELIIDAE)
- trevellianum, Pleurotoma trevellianum W. Turton, 1834 - syn of: Curtitoma trevelliana (W. Turton, 1834) - (TURRIDAE)
- trevelyana, Epitonium trevelyana Johnston, 1841 - (EPITONIIDAE)
- trevelyana, Epitonium trevelyana G. Johnston, 1841 - syn of: Epitonium trevelyana Johnston, 1841 - (EPITONIIDAE)
- Trevelyana, syn of: Genus Gymnodoris W. Stimpson, 1855 (GYMNODORIDIDAE)
- trevelyana, Oenopota trevelyana W. Turton, 1834 - syn of: Curtitoma trevelliana (W. Turton, 1834) - (MANGELIIDAE)
- trevelyana, Oenopota trevelyana D.H. Schneider, 1886 - syn of: Curtitoma trevelliana (W. Turton, 1834) - (MANGELIIDAE)
- Trevelyania, syn of: Genus Gymnodoris W. Stimpson, 1855 (GYMNODORIDIDAE)
- Trevoneites, Genus Trevoneites Becker & House, 1994 † (PARODOCERATIDAE) (FOSSIL)
- trevori, Pitar trevori K.L. Lamprell & T. Whitehead, 1990 - (VENERIDAE)
- trevorjacksoni, Campanile trevorjacksoni R. Portell & E. Donovan, 2008 † - (CAMPANILIDAE) (FOSSIL)
- trevorpaticiciorum, Naticopsis trevorpaticiciorum Peel, 1975 † - (DELPHINULOPSIDAE) (FOSSIL)
- trevorpatriciorum, Naticopsis trevorpatriciorum Peel, 1975 † - syn of: Naticopsis trevorpaticiciorum Peel, 1975 † - (DELPHINULOPSIDAE) (FOSSIL)
- trevyliana, Oenopota trevyliana W. Turton, 1834 - syn of: Curtitoma trevelliana (W. Turton, 1834) - (MANGELIIDAE)
- trewae, Eulimella trewae J.J. Van Aartsen, E. Gittenberger & J. Goud, 2000 - (PYRAMIDELLIDAE)
- trezeense, Orbignyiceras trezeense (Gérard & Contaut, 1936 †) - (LEPTOCERATOIDIDAE) (FOSSIL)
- trezonana, Camaena trezonana (G.A. Solem, 1992) - (CAMAENIDAE)
- triacantha, Peracle triacantha P. Fischer, 1882 - syn of: Peracle elata (G. Seguenza, 1875) - (PERACLIDAE)
- triacanthus, Limacina triacanthus P. Fischer, 1882 - syn of: Peracle elata (G. Seguenza, 1875) - (LIMACINIDAE)
- triacanthus, Trophon triacanthus Z.J.A. De Castellanos, E. Rolán & S. Bartolotta, 1987 - (MURICIDAE)
- Triaclymenia, Genus Triaclymenia Schindewolf , 1937 † (PARAWOCKLUMERIIDAE) (FOSSIL)
- Triacontium, Genus Triacontium Cossmann, 1922 † (APORRHAIDAE) (FOSSIL)
- triadica, Scalaria triadica E.A.L. Kittl, 1892 † - syn of: Scalaneritina triadica (E.A.L. Kittl, 1892 †) - (EPITONIIDAE) (FOSSIL)
- triadica, Rhabdoconcha triadica E.A.L. Kittl, 1894 † - (PSEUDOMELANIIDAE) (FOSSIL)
- triadica, Scalaneritina triadica (E.A.L. Kittl, 1892 †) - (SCALANERITINIDAE) (FOSSIL)
- triadica, Tenagodus triadica E.A.L. Kittl, 1892 † - (SILIQUARIIDAE) (FOSSIL)
- triadica, Sakawanella triadica K. Ichikawa, 1950 † - (TANCREDIIDAE) (FOSSIL)
- triadicum, Trematoceras triadicum (Mojsisovics, 1873 †) - (ORTHOCERATIDAE) (FOSSIL)
- triadicum, Orthoceras triadicum Mojsisovics, 1873 † - syn of: Trematoceras triadicum (Mojsisovics, 1873 †) - (ORTHOCERATIDAE) (FOSSIL)
- triadicum, Panarthron triadicum G.F. Laghi, 2005 † - (POLYPLACOPHORA (UNASSIGNED)) (FOSSIL)
- triadicus, Callotrochus triadicus (Kutassy, 1927 †) - (CALLIOSTOMATIDAE) (FOSSIL)
- triadicus, Proclydonautilus triadicus (Mojsisovics, 1873 †) - (CLYDONAUTILIDAE) (FOSSIL)
- triadicus, Turristylus triadicus (E.A.L. Kittl, 1894 †) - (COELOSTYLINIDAE) (FOSSIL)
- triadicus, Albanites triadicus (Arthaber, 1908 †) - (MEEKOCERATIDAE) (FOSSIL)
- triadicus, Nautilus triadicus Mojsisovics, 1873 † - syn of: Proclydonautilus triadicus (Mojsisovics, 1873 †) - (NAUTILIDAE) (FOSSIL)
- triadicus, Ornithopecten triadicus Salomon † - (ORNITHOPECTINIDAE) (FOSSIL)
- triadicus, Camptonectes triadicus Nakazawa 1952 † - (PECTINIDAE) (FOSSIL)
- triadicus, Pronorites triadicus Arthaber, 1908 † - syn of: Albanites triadicus (Arthaber, 1908 †) - (PRONORITIDAE) (FOSSIL)
- triadicus, Jurassiphorus triadicus F. Haas, 1953 † - (TEMNOTROPIDAE) (FOSSIL)
- Triadomegalodon, Genus Triadomegalodon Vegh-Neubrandt, 1974 † (MEGALODONTIDAE) (FOSSIL)
- Triadosinister, Genus Triadosinister Nützel, 2010 † (SETTSASSIIDAE) (FOSSIL)
- Triadoskenea, Genus Triadoskenea Bandel, 1993 † (ARCHAEOGASTROPODA (UNASSIGNED)) (FOSSIL)
- Triadoteuthis, Genus Triadoteuthis Müller, 1967 † (LIOTEUTHIDIDAE) (FOSSIL)
- Triagolytoceras, Genus Triagolytoceras † (AMMONOIDEA (UNASSIGNED)) (FOSSIL)
- Triainoceras, Genus Triainoceras Hyatt, 1884 † (TRIAINOCERATIDAE) (FOSSIL)
- TRIAINOCERATIDAE Hyatt, 1884 † - Family (CEPHALOPODA-AMMONOIDEA [Subclass]-AGONIATITIDA [Order]-PHARCICERATOIDEA [Superfamily]) (FOSSIL)
- trialata, Pteropurpura trialata (G.B. II Sowerby, 1834) - (MURICIDAE)
- trialata alba, Pteropurpura trialata alba S.S. Berry, 1912 - (MURICIDAE)
- Trialatella, Subgenus Dermomurex (Trialatella) S.S. Berry, 1964 (MURICIDAE)
- trialicii, Parthenina trialicii Peñas & Rolán, 2017 - (PYRAMIDELLIDAE)
- triancus, Discartemon triancus T. Siriboon & S. Panha, 2014 - (STREPTAXIDAE)
- Triangaphrus, Genus Triangaphrus Gründel, 2003 † (COLLONIIDAE) (FOSSIL)
- Trianglospira, Genus Trianglospira Pan, 1982 † (CAENOGASTROPODA (UNASSIGNED)) (FOSSIL)
- triangula, Mytilarca triangula Isberg, 1934 † - (AMBONYCHIIDAE) (FOSSIL)
- triangula, Cigarella triangula Astaf'yeva, 1988 † - (ATOMODESMATIDAE) (FOSSIL)
- triangula, Aturia triangula H.B. Stenzel, 1934 † - (ATURIIDAE) (FOSSIL)
- triangula, Colubraria triangula (Vasseur, 1881 †) - (COLUBRARIIDAE) (FOSSIL)
- triangula, Corbicula triangula Volobueva, 1981 † - (CYRENIDAE) (FOSSIL)
- triangula, Diplommatina triangula T.C. Yen, 1939 - (DIPLOMMATINIDAE)
- triangula, Pseudamnicola triangula Pana, 2005 † - (HYDROBIIDAE) (FOSSIL)
- triangula, Bornia triangula L.C. Glenn, 1904 † - (KELLIIDAE) (FOSSIL)
- triangula, Mactra triangula G.B. Brocchi, 1814 - syn of: Spisula subtruncata (da Costa, 1778) - (MACTRIDAE)
- triangula, Spisula subtruncata triangula (Renieri, 1804 †) - (MACTRIDAE) (FOSSIL)
- triangula, Portlandella triangula (L. Krishtofovich, 1969 †) - (NUCULANIDAE) (FOSSIL)
- triangula, Truncacila triangula Kalishevich, 1981 † - (NUCULIDAE) (FOSSIL)
- triangula, Charonia triangula Vasseur, 1881 † - (RANELLIDAE) (FOSSIL)
- triangula, Arcopagia ventricosa triangula G.F. Dollfus, Cotter & R. Gomez, 1904 † - (TELLINIDAE) (FOSSIL)
- triangula, Lampeia triangula G.M. Kamenev & V.A. Nadtochy, 1998 - (THRACIIDAE)
- triangula, Acuticosta triangula S. Tchang, K. Li & J.Y. Liu, 1965 - syn of: Acuticosta trisulcata triangula S. Tchang, K. Li & J.Y. Liu, 1965 - (UNIONIDAE)
- triangula, Acuticosta trisulcata triangula S. Tchang, K. Li & J.Y. Liu, 1965 - (UNIONIDAE)
- triangulare, Acrosterigma triangulare B.K. Raines & M. Huber, 2012 - (CARDIIDAE)
- triangulare, Glottoceras triangulare Benavides-Caceres, 1956 † - (KNEMICERATIDAE) (FOSSIL)
- triangulare, Neolepton triangulare (R.K. Dell, 1956) - (NEOLEPTONIDAE)
- triangulare, Sphaerium triangulare (T. Say, 1829) - (SPHAERIIDAE)
- triangulare, Tripleuroceras triangulare (d'Archiac & Verneuil, 1842 †) - (TRIPLEUROCERATIDAE) (FOSSIL)
- triangulare, Kindleoceras triangulare Foerste, 1924 † - (VALCOUROCERATIDAE) (FOSSIL)
- triangulare, Vascoceras triangulare Faraud, 1940 † - (VASCOCERATIDAE) (FOSSIL)
- Triangularia, Genus Triangularia Frech , 1894 † (GOSSELETINIDAE) (FOSSIL)
- triangularis, Acmaea triangularis P.P. Carpenter, 1864 - syn of: Lottia triangularis (P.P. Carpenter, 1864) - (ACMAEIDAE)
- triangularis, Anisocardia triangularis (W.I. Bean †) - (ARCTICIDAE) (FOSSIL)
- triangularis, Goodallia triangularis (G. Montagu, 1803) - (ASTARTIDAE)
- triangularis, Astarte triangularis (Montague, 1803 †) - (ASTARTIDAE) (FOSSIL)
- triangularis, Bellerophon triangularis L. Waagen, 1880 † - (BELLEROPHONTIDAE) (FOSSIL)
- triangularis, Phragmolites triangularis Ulrich & Scofield, 1897 † - (BUCANIIDAE) (FOSSIL)
- triangularis, Nemetia triangularis (Whitfield 1891) † - (CARDIIDA (UNASSIGNED)) (FOSSIL)
- triangularis, Cassis triangularis J. Coulon, 1936 - syn of: Cassis tuberosa (C. Linnaeus, 1758) - (CASSIDAE)
- triangularis, Lithoconus triangularis Finlay, 1924 † - (CONIDAE) (FOSSIL)
- triangularis, Crassatina triangularis (J.B.P.A. Lamarck, 1805 †) - (CRASSATELLIDAE) (FOSSIL)
- triangularis, Geloina triangularis (Dufour, 1881 †) - (CYRENIDAE) (FOSSIL)
- triangularis, Corbicula triangularis G.P. Deshayes, 1854 - syn of: Corbicula fluminea (O.F. Müller, 1774) - (CYRENIDAE)
- triangularis, Cystiscus triangularis T. Cossignani, 2008 - (CYSTISCIDAE)
- triangularis, Pythia triangularis W.H. Benson, 1836 - syn of: Pythia plicata (A.E.J. Férussac, 1821) - (ELLOBIIDAE)
- triangularis, Gracilitheca triangularis Valent & al., 2012 † - (GRACILITHECIDAE) (FOSSIL)
- triangularis, Sinosachites triangularis He, 1980 † - syn of: Sinosachites flabelliformis He, 1980 † - (HALKIERIIDAE) (FOSSIL)
- triangularis, Angulithes triangularis (P.D. Montfort, 1802 †) - (HERCOGLOSSIDAE) (FOSSIL)
- triangularis, Ichthyosarcolites triangularis A.G. Desmarest, 1822 † - (ICHTHYOSARCOLITIDAE) (FOSSIL)
- triangularis, Retispira triangularis E.K. Yoo, 1994 † - (KNIGHTITIDAE) (FOSSIL)
- triangularis, Lottia triangularis (P.P. Carpenter, 1864) - (LOTTIIDAE)
- triangularis, Maclurites triangularis Teichert, 1937 † - (MACLURITIDAE) (FOSSIL)
- triangularis, Mactra triangularis J.B.P.A. Lamarck, 1818 - syn of: Oxyperas lentiginosa (A.A. Gould, 1852) - (MACTRIDAE)
- triangularis, Kurtiella triangularis (R.B. Watson, 1897) - (MONTACUTIDAE)
- triangularis, Tripterotyphis triangularis (Adams, 1855) - (MURICIDAE)
- triangularis, Acanthais triangularis (H.M.D. de Blainville, 1832) - (MURICIDAE)
- triangularis, Vitularia triangularis L. Bozzetti, 2009 - (MURICIDAE)
- triangularis, Acanthina triangularis DeVries, 2003 † - (MURICIDAE) (FOSSIL)
- triangularis, Purpura triangularis H.M.D. de Blainville, 1832 - syn of: Acanthais triangularis (H.M.D. de Blainville, 1832) - (MURICIDAE)
- triangularis, Murex triangularis P.O. Jung, 1965 † - syn of: Chicoreus denegatus (P.O. Jung, 1966 †) - (MURICIDAE) (FOSSIL)
- triangularis, Myadora triangularis R.W. Dunker, 1882 - syn of: Myadora fluctuosa A.A. Gould, 1861 - (MYOCHAMIDAE)
- triangularis, Nautilus triangularis P.D. Montfort, 1802 † - (NAUTILIDAE) (FOSSIL)
- triangularis, Neritina triangularis O.A.L. Mörch, 1852 - syn of: Vittina coromandeliana (G.B. II Sowerby, 1832) - (NERITIDAE)
- triangularis, Noetia triangularis J.E. Gray, 1857 - syn of: Noetia reversa (G.B. I Sowerby, 1833) - (NOETIIDAE)
- triangularis, Nuculopsis triangularis G.B. Campbell & H. Engel, 1963 † - (NUCULIDAE) (FOSSIL)
- triangularis, Ostrea triangularis F.S. Holmes, 1856 - syn of: Crassostrea virginica (J.F. Gmelin, 1791) - (OSTREIDAE)
- triangularis, Palaeomutela triangularis Amalitsky, 1892 † - (PALAEOMUTELIDAE) (FOSSIL)
- triangularis, Triaclymenia triangularis Schindewolf, 1937 † - (PARAWOCKLUMERIIDAE) (FOSSIL)
- triangularis, Platyostoma triangularis Talent & Philip, 1956 † - (PLATYCERATIDAE) (FOSSIL)
- triangularis, Poromya triangularis W.H. Dall, 1881 - syn of: Poromya rostrata H.A. Rehder, 1943 - (POROMYIDAE)
- triangularis, Carinonychia triangularis Pojeta & al. 1986 † - (PTERIIDA (UNASSIGNED)) (FOSSIL)
- triangularis, Pteria triangularis B. Prashad, 1932 - (PTERIIDAE)
- triangularis, Pterotheca triangularis Bradley, 1930 † - (PTEROTHECIDAE) (FOSSIL)
- triangularis, Eoradiolites triangularis (A.V.M.D. D'Orbigny, 1847 †) - (RADIOLITIDAE) (FOSSIL)
- triangularis, Septa triangularis Perry, 1811 - syn of: Lotoria perryi (Perry, 1811) - (RANELLIDAE)
- triangularis, Setia triangularis (R.B. Watson, 1886) - (RISSOIDAE)
- triangularis, Rissoina triangularis R.B. Watson, 1886 - (RISSOINIDAE)
- triangularis, Wilkingia triangularis Zhang, 1977 † - (SANGUINOLITIDAE) (FOSSIL)
- triangularis, Ervilia triangularis W.H. Dall, 1898 † - (SEMELIDAE) (FOSSIL)
- triangularis, Siphogonuchites triangularis Z.X. Qian, 1977 † - (SIPHOGONUCHITIDAE) (FOSSIL)
- triangularis, Eupera triangularis G. Mandahl-Barth, 1973 - syn of: Eupera triangulum G. Mandahl-Barth, 1973 - (SPHAERIIDAE)
- triangularis, Anamenia triangularis (H. Heath, 1911) - (STROPHOMENIIDAE)
- triangularis, Tancredia triangularis C. Chen & Wen, 1979 † - (TANCREDIIDAE) (FOSSIL)
- triangularis, Tellina triangularis J.H. Chemnitz, 1782 - syn of: Tellina trilatera J.F. Gmelin, 1791 - (TELLINIDAE)
- triangularis, Tellina triangularis L.W. Dillwyn, 1817 - syn of: Tellina trilatera J.F. Gmelin, 1791 - (TELLINIDAE)
- triangularis, Tellina triangularis P.F. Röding, 1798 - syn of: Tellina trilatera J.F. Gmelin, 1791 - (TELLINIDAE)
- triangularis, Teredo triangularis C.H. Edmondson, 1942 - (TEREDINIDAE)
- triangularis, Bankia triangularis P.B. Sivickis, 1928 - syn of: Nausitora dunlopei (B.H. Wright, 1864) - (TEREDINIDAE)
- triangularis, Vasum truncatum triangularis (E.A. Smith, 1902) - (TURBINELLIDAE)
- triangularis, Solenaia triangularis P.M. Heude, 1874 - (UNIONIDAE)
- triangularis, Anodonta triangularis J.B. Trask, 1855 - syn of: Anodonta nuttalliana (I. Lea, 1838) - (UNIONIDAE)
- triangularis, Grateloupia triangularis (B. de Basterot, 1825 †) - (VENERIDAE) (FOSSIL)
- triangularis, Venus triangularis G. Montagu, 1803 - syn of: Gouldia minima (G. Montagu, 1803) - (VENERIDAE)
- triangularis, Verticordia triangularis É.A.A. Locard, 1898 - (VERTICORDIIDAE)
- triangularis fusca, Astarte triangularis fusca P. Dautzenberg & P. Durouchoux, 1913 - syn of: Goodallia triangularis (G. Montagu, 1803) - (ASTARTIDAE)
- triangularis radiata, Astarte triangularis radiata P. Dautzenberg & P. Durouchoux, 1913 - syn of: Goodallia triangularis (G. Montagu, 1803) - (ASTARTIDAE)
- triangulata, Delphinula triangulata A.G. de Rayneval & G. Ponzi, 1854 - syn of: Circulus striatus W.M. Gabb, 1873 - (ANGARIIDAE)
- triangulata, Aporrhais triangulata Gardner, 1884 † - (APORRHAIDAE) (FOSSIL)
- triangulata, Astarte triangulata Meyer, 1886 † - (ASTARTIDAE) (FOSSIL)
- triangulata, Diacavolinia triangulata S. Van Der Spoel, P. Bleeker & H. Kobayasi, 1993 - (CAVOLINIIDAE)
- triangulata, Warrana triangulata P.U. Middelfart, 2002 - (CONDYLOCARDIIDAE)
- triangulata, Puncturella triangulata W.H. Dall, 1889 - syn of: Cornisepta acuminata (R.B. Watson, 1883) - (FISSURELLIDAE)
- triangulata, Temblornia triangulata (F.M. Anderson & B. Martin, 1914 †) - (LASAEIDAE) (FOSSIL)
- triangulata, Chaenocardiola triangulata G.B. Campbell & H. Engel, 1963 † - (LUNULICARDIIDAE) (FOSSIL)
- triangulata, Mactromeris triangulata L.S. Zhidkova, 1994 † - (MACTRIDAE) (FOSSIL)
- triangulata, Muricodrupa triangulata W.H. Pease, 1866 - syn of: Muricodrupa fiscella (J.F. Gmelin, 1791) - (MURICIDAE)
- triangulata, Theliostyla triangulata W.M. Gabb, 1869 † - (NERITIDAE) (FOSSIL)
- triangulata, Nuculana triangulata Meyer, 1886 † - (NUCULANIDAE) (FOSSIL)
- triangulata, Indonellina triangulata Silantiev, Chandra & Urazaeva, 2015 † - (PROKOPIEVSKIIDAE) (FOSSIL)
- triangulata, Abra triangulata W.H. Dall, 1900 † - (SEMELIDAE) (FOSSIL)
- triangulata, Shaanxiconcha triangulata H.X. Liu, 1980 † - (SHAANXICONCHIDAE) (FOSSIL)
- triangulata, Alasmidonta triangulata I. Lea, 1858 - (UNIONIDAE)
- triangulata, Pachymyonia triangulata C.O. Waterhouse, 1969 † - (VACUNELLIDAE) (FOSSIL)
- triangulata, Zerotula triangulata A.W.B. Powell, 1937 - (ZEROTULIDAE)
- triangulatus, Stenothecoides triangulatus Koneva, 1979 † - (CAMBRIDIIDAE) (FOSSIL)
- triangulatus, Absidaticonus triangulatus Xing & al., 1984 † - (HELCIONELLIDAE) (FOSSIL)
- triangulatus, Boreotrophon triangulatus (P.P. Carpenter, 1864) - (MURICIDAE)
- triangulatus, Olingechiton triangulatus J.R.M. Bergenhayn, 1943 † - (SCANOCHITONIDAE) (FOSSIL)
- triangulatus, Strombus triangulatus K. Martin, 1879 † - (STROMBIDAE) (FOSSIL)
- triangulifera, Mitrella triangulifera H. von Maltzan, 1884 - syn of: Mitrella denticulata (P.L. Duclos, 1840) - (COLUMBELLIDAE)
- triangulifera, Columbella triangulifera H. von Maltzan, 1884 - syn of: Mitrella denticulata (P.L. Duclos, 1840) - (COLUMBELLIDAE)
- trianguliformis, Halkieria trianguliformis Missarzhevsky & Mambetov, 1981 † - (HALKIERIIDAE) (FOSSIL)
- trianguliformis, Dengyingoconus trianguliformis Xing & al., 1984 † - syn of: Ocruranus subpentaedrus H.X. Liu, 1979 † - (HALKIERIIDAE) (FOSSIL)
- triangulos, Syntomodrillia triangulos P.J. Fallon, 2016 - (DRILLIIDAE)
- triangulum, Charactoceras triangulum Frye, 1982 † - (APSIDOCERATIDAE) (FOSSIL)
- triangulum, Bassleroceras triangulum Kröger & Landing, 2008 † - (BASSLEROCERATIDAE) (FOSSIL)
- triangulum, Cryptaulia triangulum Pocta 1889 † - (HIPPURITIDA (UNASSIGNED)) (FOSSIL)
- triangulum, Prunum triangulum M. Lussi & G. Smith, 2015 - (MARGINELLIDAE)
- triangulum, Modiola triangulum F.C.L. Koch in R.A. Philippi, 1847 - syn of: Modiolus modulaides (P.F. Röding, 1798) - (MYTILIDAE)
- triangulum, Eupera triangulum G. Mandahl-Barth, 1973 - (SPHAERIIDAE)
- triangulus, Amphithalamus triangulus W.L. May, 1915 - (ANABATHRIDAE)
- triangulus, Homeochiton triangulus Hanger & al., 2000 † - (HANLEYIDAE) (FOSSIL)
- triangulus, Ecculiomphalus triangulus R.P. Whitfield, 1890 † - (OPHILETIDAE) (FOSSIL)
- triangulus, Phisonites triangulus Shevyrev, 1965 † - (XENODISCIDAE) (FOSSIL)
- Triangustoma, Genus Triangustoma A.A. Schileyko, 1984 (ENIDAE)
- Triaphorus, Genus Triaphorus Marwick, 1953 † (KALENTERIDAE) (FOSSIL)
- Triaracerithium, Genus Triaracerithium Sacco, 1895 † (CAENOGASTROPODA (UNASSIGNED)) (FOSSIL)
- triarata, Paracingulina triarata (H.A. Pilsbry, 1904) - (PYRAMIDELLIDAE)
- triarius, Aspasita triarius (E.A. Rossmässler, 1839) - (SPELAEODISCIDAE)
- triarius tatricus, Aspasita triarius tatricus (J. Hazay, 1883) - (SPELAEODISCIDAE)
- triarius trinodis, Aspasita triarius trinodis (M. von Kimakowicz, 1883) - (SPELAEODISCIDAE)
- triarmata, Riselloidea triarmata Hébert & Eudes-Deslongchamps, 1860 † - syn of: Biarmatoidella lorioli (Greppin, 1898 †) - (EUCYCLIDAE) (FOSSIL)
- triarmatus, Trochus triarmatus Hébert & Eudes-Deslongchamps, 1860 † - syn of: Biarmatoidella lorioli (Greppin, 1898 †) - (TROCHIDAE) (FOSSIL)
- Triasamnicola, Genus Triasamnicola Yen & Reeside, 1946 † (ARCHAEOGASTROPODA (UNASSIGNED)) (FOSSIL)
- triasica, Catantostoma triasica C.A. von Zittel, 1882 † - syn of: Laubella delicata (Laube, 1868 †) - (CATANTOSTOMATIDAE) (FOSSIL)
- triasica, Hamusina triasica Cox, 1949 † - syn of: Hesperisternia tortugera (A.A. Olsson, 1922 †) - (CHILODONTIDAE) (FOSSIL)
- triasicus, Hesperocirrus triasicus (L.R. Cox, 1949 †) - (CIRRIDAE) (FOSSIL)
- Triasoperna, Subgenus Inoperna (Triasoperna) Repin, 1996 † (MYTILIDAE) (FOSSIL)
- triassica, Gudrunella triassica A. Nützel & Erwin, 2004 † - (COLLONIIDAE) (FOSSIL)
- triassica, Glyptotomaria triassica Yin & E.L. Yochelson, 1983 † - (GOSSELETINIDAE) (FOSSIL)
- triassica, Pegmavalvula triassica Newell & Boyd, 1995 † - (PSEUDOMONOTIDAE) (FOSSIL)
- triassica, Pinctada triassica J.J.F. Whiteaves, 1889 † - (PTERIIDAE) (FOSSIL)
- triassicus, Permophorus triassicus Newell & Boyd, 1999 † - (KALENTERIDAE) (FOSSIL)
- Triassocirrus, Genus Triassocirrus Yin & Yochelson, 1983 † (EUOMPHALINA (UNASSIGNED)) (FOSSIL)
- Triassurella, Genus Triassurella A. Nützel & D.L. Geiger, 2006 † (SUTILIZONIDAE) (FOSSIL)
- Triaxus, Genus Triaxus Brown, 1849 † (PTERIIDAE) (FOSSIL)
- tribakus, Pallacera tribakus (Gardner, 1944 †) - (NASSARIIDAE) (FOSSIL)
- tribalteata, Volvarina tribalteata Auct. non L.A. Reeve, 1865 - syn of: Volvarina cernita (É.A.A. Locard, 1897) - (MARGINELLIDAE)
- tribalteata, Volvarina tribalteata L.A. Reeve, 1865 - syn of: Volvarina exilis (J.F. Gmelin, 1791) - (MARGINELLIDAE)
- tribalteatus, Drymaeus tribalteatus (L.A. Reeve, 1848) - (BULIMULIDAE)
- tribblei, Kioconus tribblei (J.G. Walls, 1977) - (CONIDAE)
- tribblei queenslandis, Conus tribblei queenslandis A.J. Da Motta, 1984 - syn of: Kioconus queenslandis (A.J. Da Motta, 1984) - (CONIDAE)
- Tribelopoma, Genus Tribelopoma Jacquet, Jago & Brock, 2016 † (HELCIONELLOIDEA (UNASSIGNED)) (FOSSIL)
- tribhuvana, Glessula tribhuvana Budha, 2017 - (SUBULINIDAE)
- Tribia, Genus Tribia F.P. Jousseaume, 1887 (CANCELLARIIDAE)
- Triblidium, syn of: Genus Tryblidium Angelin & Lindström, 1880 † (TRYBLIDIIDAE) (FOSSIL)
- Triblydium, syn of: Genus Tryblidium Angelin & Lindström, 1880 † (TRYBLIDIIDAE) (FOSSIL)
- Tribocystis, syn of: Genus Melloconcha T. Iredale, 1944 (HELICARIONIDAE)
- triboleti, Lytoceras triboleti (Uhlig 1902 †) - (LYTOCERATIDAE) (FOSSIL)
- Triboloceras, Genus Triboloceras Shimanskiy, 1967 † (TRIGONOCERATIDAE) (FOSSIL)
- Triboniophorus, Subgenus Aneitea (Triboniophorus) A. Humbert, 1863 (ATHORACOPHORIDAE)
- Triboplax, syn of: Genus Chiton C. Linnaeus, 1758 (CHITONIDAE)
- tribulationis, Joculator tribulationis (C. Hedley, 1909) - (CERITHIOPSIDAE)
- tribulationis, Cecilioides tribulationis (H.B. Preston, 1911) - (FERUSSACIIDAE)
- tribulationis, Heterocithara tribulationis (C. Hedley, 1909) - (MANGELIIDAE)
- tribulationis, Chrysallida tribulationis (C. Hedley, 1909) - (PYRAMIDELLIDAE)
- tribulationis, Pseudoliotia tribulationis (C. Hedley, 1909) - (TORNIDAE)
- tribulationis, Obesula tribulationis (C. Hedley, 1909) - (TRIPHORIDAE)
- tribulosum, Vasum tribulosum E.H. Vokes, 1970 † - (TURBINELLIDAE) (FOSSIL)
- Tribulus, Genus Tribulus H. Adams & A. Adams, 1853 (MURICIDAE)
- tribulus, Murex tribulus C. Linnaeus, 1758 - (MURICIDAE)
- tribulus, Drupa tribulus P.F. Röding, 1798 - syn of: Drupa ricinus (C. Linnaeus, 1758) - (MURICIDAE)
- tribulus, Murex tribulus J.H. Chemnitz, 1793 - syn of: Murex pecten J. Lightfoot, 1786 - (MURICIDAE)
- tribulus pecten, Murex tribulus pecten J. Lightfoot, 1786 - syn of: Murex pecten J. Lightfoot, 1786 - (MURICIDAE)
- tribulus ternispina, Murex tribulus ternispina M.M. Schepman, 1911 - syn of: Murex troscheli C.E. Lischke, 1868 - (MURICIDAE)
- tribulus ternispina, Murex tribulus ternispina J.B.P.A. Lamarck, 1822 - syn of: Murex ternispina J.B.P.A. Lamarck, 1822 - (MURICIDAE)
- tribunalis, Polymesoda tribunalis (T. Prime, 1870) - (CYRENIDAE)
- tribunicae, Plagigeyeria tribunicae H. Schütt, 1963 - (HYDROBIIDAE)
- tribunus, Conus tribunus J.C.H. Crosse, 1865 - syn of: Rhizoconus hyaena (C.H. Hwass, 1792) - (CONIDAE)
- tribunus, Conus tribunus J.F. Gmelin, 1791 - syn of: Conasprella centurio (I. von Born, 1778) - (CONIDAE)
- tricamerae, Hebetorthoceras tricamerae (Smith, 1938 †) - (PSEUDORTHOCERATIDAE) (FOSSIL)
- Tricarilda, Subgenus Mathilda (Tricarilda) Grundel, 1973 † (MATHILDIDAE) (FOSSIL)
- tricarina, Nehedia tricarina Caldwell & Chatterton, 1995 † - (PSEUDOBIGALEAIDAE) (FOSSIL)
- tricarinata, Aclis tricarinata R.B. Watson, 1897 - syn of: Pseudoscilla babylonia (C.B. Adams, 1845) - (ACLIDIDAE)
- tricarinata, Amathina tricarinata (C. Linnaeus, 1767) - (AMATHINIDAE)
- tricarinata, Antijanira tricarinata Gou, 1993 † - (ANTIJANIRIDAE) (FOSSIL)
- tricarinata, Architectonica tricarinata R.E.C. Stearns, 1872 - syn of: Arene tricarinata (R.E.C. Stearns, 1872) - (ARCHITECTONICIDAE)
- tricarinata, Arene tricarinata (R.E.C. Stearns, 1872) - (ARENEIDAE)
- tricarinata, Belosepia tricarinata A. Watelet, 1851 † - (BELOSAEPIIDAE) (FOSSIL)
- tricarinata, Filodrillia tricarinata (J.E. Tenison-Woods, 1878) - (BORSONIIDAE)
- tricarinata, Falsitromina tricarinata (A.W.B. Powell, 1951) - (BUCCINIDAE)
- tricarinata, Trichotropis tricarinata J.W. Brazier, 1877 - syn of: Separatista helicoides (J.F. Gmelin, 1791) - (CAPULIDAE)
- tricarinata, Galeodea tricarinata (T.A. Conrad, 1848 †) - (CASSIDAE) (FOSSIL)
- tricarinata, Tryonia tricarinata (O. Böttger, 1871) - (COCHLIOPIDAE)
- tricarinata, Cymaclymenia tricarinata C.N. Lange, 1929 † - (CYMACLYMENIIDAE) (FOSSIL)
- tricarinata, Eglisia tricarinata A. Adams & L.A. Reeve, 1850 - (EPITONIIDAE)
- tricarinata, Risselloidea tricarinata J.H.F. Douvillé, 1916 † - (EUCYCLIDAE) (FOSSIL)
- tricarinata, Ferussina tricarinata (M. Braun, 1838) † - (FERUSSINIDAE) (FOSSIL)
- tricarinata, Hemitoma tricarinata C. Linnaeus, 1767 - syn of: Amathina tricarinata (C. Linnaeus, 1767) - (FISSURELLIDAE)
- tricarinata, Hemitoma tricarinata I. von Born, 1778 - syn of: Montfortista panhi (J.R.C. Quoy, 1834) - (FISSURELLIDAE)
- tricarinata, Emarginula tricarinata H.A. Pilsbry, 1890 - syn of: Montfortista panhi (J.R.C. Quoy, 1834) - (FISSURELLIDAE)
- tricarinata, Goniasma tricarinata A. Nützel & Ketwetsuriya, 2016 † - (GONIASMATIDAE) (FOSSIL)
- tricarinata, Haloceras tricarinata (J.G. Jeffreys, 1885) - (HALOCERATIDAE)
- tricarinata, Lophonema tricarinata (Billings, 1859 †) - (HELICOTOMIDAE) (FOSSIL)
- tricarinata, Hipponix tricarinata (C. Linnaeus, 1767) - (HIPPONICIDAE)
- tricarinata, Micromelania tricarinata Lörenthey, 1893 † - (HYDROBIIDAE) (FOSSIL)
- tricarinata, Probaicalia tricarinata Pan, 1980 † - (HYDROBIIDAE) (FOSSIL)
- tricarinata, Liotia tricarinata R.E.C. Stearns, 1872 - syn of: Arene tricarinata (R.E.C. Stearns, 1872) - (LIOTIIDAE)
- tricarinata, Lophospira tricarinata J.W. Hall, 1847 † - syn of: Lophospira perangulata (J.W. Hall, 1847 †) - (LOPHOSPIRIDAE) (FOSSIL)
- tricarinata, Ekstadia tricarinata T. Soot-Ryen, 1964 † - (MALLETIIDAE) (FOSSIL)
- tricarinata, Melanopsis tricarinata (J.G. Bruguière, 1789) - (MELANOPSIDAE)
- tricarinata, Murchisonia tricarinata Sherzer & A.W. Grabau, 1910 † - syn of: Murchisonia anderdoniae E.G. Linsley, 1968 † - (MURCHISONIIDAE) (FOSSIL)
- tricarinata, Pteropurpura tricarinata (J.B.P.A. Lamarck, 1803 †) - (MURICIDAE) (FOSSIL)
- tricarinata, Nerita tricarinata J.B.P.A. Lamarck, 1804 † - (NERITIDAE) (FOSSIL)
- tricarinata, Trochonemopsis tricarinata F.B. Meek, 1871 † - syn of: Trochonemopsis meekanum Miller, 1889 † - (OMPHALOTROCHIDAE) (FOSSIL)
- tricarinata, Patella tricarinata C. Linnaeus, 1767 - syn of: Amathina tricarinata (C. Linnaeus, 1767) - (PATELLIDAE)
- tricarinata, Endothyrella plectostoma tricarinata (G.P.L.K. Gude, 1896) - (PLECTOPYLIDAE)
- tricarinata, Pleurotomaria tricarinata Klipstein, 1843 † - (PLEUROTOMARIIDAE) (FOSSIL)
- tricarinata, Tropidophora tricarinata (O.F. Müller, 1774) - (POMATIIDAE)
- tricarinata, Dorymenia tricarinata (K.H.J. Thiele, 1913) - (PRONEOMENIIDAE)
- tricarinata, Pseudotissotia nigeriensis tricarinata Reyment, 1954 † - (PSEUDOTISSOTIIDAE) (FOSSIL)
- tricarinata, Latavia tricarinata C.F. Laseron, 1951 - (PYRAMIDELLIDAE)
- tricarinata, Eucyclotoma tricarinata (L.C. Kiener, 1840) - (RAPHITOMIDAE)
- tricarinata, Eucyclotoma tricarinata L.A. Reeve, 1843 - syn of: Eucyclotoma exilis (R.W. Dunker, 1871) - (RAPHITOMIDAE)
- tricarinata, Entonomenia tricarinata (L. Salvini-Plawén, 1978) - (RHOPALOMENIIDAE)
- tricarinata, Merelina tricarinata (A.W.B. Powell, 1937) - (RISSOIDAE)
- tricarinata, Rissoina tricarinata Morris & J. Lycett, 1850 † - (RISSOINIDAE) (FOSSIL)
- tricarinata, Sinezona tricarinata I. Yaron, 1983 - syn of: Sukashitrochus dorbignyi (J.V. Audouin, 1826) - (SCISSURELLIDAE)
- tricarinata, Seguenzia tricarinata J.G. Jeffreys, 1885 - syn of: Haloceras tricarinata (J.G. Jeffreys, 1885) - (SEGUENZIIDAE)
- tricarinata, Ventsia tricarinata A. Warén & P. Bouchet, 1993 - (SEGUENZIOIDEA (UNASSIGNED))
- tricarinata, Leucorhynchia tricarinata J.C. Melvill & R. Standen, 1896 - (SKENEIDAE)
- tricarinata, Skenea tricarinata W.H. Webster, 1856 - syn of: Ammonicera rota (E. Forbes & S.C.T. Hanley, 1850) - (SKENEIDAE)
- tricarinata, Pelicaria vermis tricarinata (R.P. Lesson, 1841) - (STRUTHIOLARIIDAE)
- tricarinata, Taioma tricarinata Finlay & J. Marwick, 1937 † - (TAIOMIDAE) (FOSSIL)
- tricarinata, Senefelderiteuthis tricarinata (G.G. Münster, 1846 †) - (TEUTHIDA (UNASSIGNED)) (FOSSIL)
- tricarinata, Thyasira tricarinata W.H. Dall, 1916 - syn of: Channelaxinus excavatus (W.H. Dall, 1901) - (THYASIRIDAE)
- tricarinata, Metaxia tricarinata (W.H. Pease, 1861) - (TRIPHORIDAE)
- tricarinata, Clanculus tricarinata J.B.P.A. Lamarck, 1822 - (TROCHIDAE)
- tricarinata, Nummogaultina tricarinata J. Gründel & H.A. Kollmann, 2013 † - (TURBINIDAE) (FOSSIL)
- tricarinata, Pleurotoma tricarinata L.C. Kiener, 1840 - syn of: Eucyclotoma tricarinata (L.C. Kiener, 1840) - (TURRIDAE)
- tricarinata, Mesalia tricarinata Abbass, 1967 † - (TURRITELLIDAE) (FOSSIL)
- tricarinata, Turritella tricarinata G.B. Brocchi, 1814 - syn of: Turritella cingulata G.B. I Sowerby, 1825 - (TURRITELLIDAE)
- tricarinata, Turritella tricarinata P.P. King, 1832 - syn of: Turritella cingulata G.B. I Sowerby, 1825 - (TURRITELLIDAE)
- tricarinata, Valvata tricarinata (T. Say, 1817) - (VALVATIDAE)
- tricarinata, Vanikoro tricarinata (C.A. Récluz, 1843) - (VANIKORIDAE)
- tricarinata ambodiarensis, Tropidophora tricarinata ambodiarensis E. Fischer-Piette, Ch.P. Blanc, F. Blanc & F. Salvat, 1993 - (POMATIIDAE)
- tricarinata bakeri, Valvata tricarinata bakeri W.H. Fluck, 1932 - (VALVATIDAE)
- tricarinata basalis, Valvata tricarinata basalis E.G. Vanatta, 1915 - (VALVATIDAE)
- tricarinata bicarinata, Tropidophora tricarinata bicarinata (G.B. Sowerby, 1843) - (POMATIIDAE)
- tricarinata brevimargo, Tropidophora tricarinata brevimargo A. Mousson, 1882 - (POMATIIDAE)
- tricarinata chenui, Tropidophora tricarinata chenui E. Fischer-Piette, 1949 - (POMATIIDAE)
- tricarinata citrina, Tropidophora tricarinata citrina (G.B. Sowerby, 1843) - (POMATIIDAE)
- tricarinata confusa, Valvata tricarinata confusa Walker, 1917 - syn of: Valvata tricarinata perconfusa B. Walker, 1917 - (VALVATIDAE)
- tricarinata consanguinea, Tropidophora tricarinata consanguinea (G.B. Sowerby, 1874) - (POMATIIDAE)
- tricarinata coronata, Melanopsis tricarinata coronata J. Ahuir, 2015 - (MELANOPSIDAE)
- tricarinata dufourii, Melanopsis tricarinata dufourii A.E.J. Férussac, 1823 - syn of: Melanopsis dufourii (A.E.J. Férussac, 1823) - (MELANOPSIDAE)
- tricarinata euchila, Tropidophora tricarinata euchila (L. Pfeiffer, 1851) - (POMATIIDAE)
- tricarinata infracarinata, Valvata tricarinata infracarinata E.G. Vanatta, 1915 - (VALVATIDAE)
- tricarinata intermissa, Filodrillia tricarinata intermissa (C.F. Laseron, 1954) - (BORSONIIDAE)
- tricarinata jousseaumia, Tropidophora tricarinata jousseaumia J.F. Mabille - (POMATIIDAE)
- tricarinata kianjavatoi, Tropidophora tricarinata kianjavatoi P. Fischer - (POMATIIDAE)
- tricarinata madagascariensis, Tropidophora tricarinata madagascariensis (J.E. Gray, 1834) - (POMATIIDAE)
- tricarinata mahaderensis, Tropidophora tricarinata mahaderensis E. Fischer-Piette, M. Cauquoin & A.M. Testud, 1973 - (POMATIIDAE)
- tricarinata minor, Melanopsis tricarinata minor (J.G. Bruguière, 1789) - (MELANOPSIDAE)
- tricarinata multifasciata, Tropidophora tricarinata multifasciata (J.P.S. Grateloup, 1840) - (POMATIIDAE)
- tricarinata pentastoma, Nerita tricarinata pentastoma G.P. Deshayes, 1864 † - (NERITIDAE) (FOSSIL)
- tricarinata perconfusa, Valvata tricarinata perconfusa B. Walker, 1917 - (VALVATIDAE)
- tricarinata unicarinata, Tropidophora tricarinata unicarinata (J.B.P.A. Lamarck, 1822) - (POMATIIDAE)
- tricarinata zonulata, Tropidophora tricarinata zonulata G.B. Sowerby, 1850 - (POMATIIDAE)
- tricarinatum, Fengchengoceras tricarinatum J.K. Zhao & al., 1978 † - (ANDERSSONOCERATIDAE) (FOSSIL)
- tricarinatum, Buccinum tricarinatum W.H. Dall, 1877 - (BUCCINIDAE)
- tricarinatum, Ditropopsis tricarinatum (E.A. Smith, 1894) - (CYCLOPHORIDAE)
- tricarinatum, Dentalium tricarinatum M. Boissevain, 1906 - syn of: Rhomboxiphus tricarinatus (M. Boissevain, 1906) - (DENTALIIDAE)
- tricarinatum, Bauchioceras tricarinatum Reyment, 1954 † - (PSEUDOTISSOTIIDAE) (FOSSIL)
- tricarinatum, Metaxia tricarinatum W.H. Pease, 1861 - syn of: Metaxia tricarinata (W.H. Pease, 1861) - (TRIPHORIDAE)
- tricarinatum, Trochonema tricarinatum Billings, 1859 † - syn of: Lophonema tricarinata (Billings, 1859 †) - (TROCHONEMATIDAE) (FOSSIL)
- tricarinatus, Ammonites tricarinatus A.V.M.D. D'Orbigny, 1841 - syn of: Peroniceras subtricarinatum (A.V.M.D. D'Orbigny, 1850 †) - (AMMONITIDA (unassigned))
- tricarinatus, Lanistes tricarinatus E. Neubert & D. Van Damme, 2012 † - (AMPULLARIIDAE) (FOSSIL)
- tricarinatus, Sanyangites tricarinatus J.K. Zhao & al., 1978 † - (ARAXOCERATIDAE) (FOSSIL)
- tricarinatus, Pharkidonotus tricarinatus Shumard & Swallow, 1858 † - syn of: Pharkidonotus percarinatus (T.A. Conrad, 1842 †) - (BELLEROPHONTIDAE) (FOSSIL)
- tricarinatus, Capulus tricarinatus (C. Linnaeus, 1767) - (CAPULIDAE)
- tricarinatus, Cenoceras tricarinatus Vadasz, 1910 † - (CENOCERATIDAE) (FOSSIL)
- tricarinatus, Euchelus tricarinatus J.B.P.A. Lamarck, 1822 - syn of: Euchelus asper quadricarinatus (H.S. Holten, 1802) - (CHILODONTIDAE)
- tricarinatus, Dyris tricarinatus Boettger, 1878 † - (COCHLIOPIDAE) (FOSSIL)
- tricarinatus, Cirsochilus tricarinatus (C.R. Laws, 1939 †) - (COLLONIIDAE) (FOSSIL)
- tricarinatus, Rhomboxiphus tricarinatus (M. Boissevain, 1906) - (ENTALINIDAE)
- tricarinatus, Ficus tricarinatus J.B.P.A. Lamarck, 1803 † - (FICIDAE) (FOSSIL)
- tricarinatus, Gondwanorbis tricarinatus A. Rumi & D.E. Gutiérrez Gregoric, 2015 - (GLACIDORBIDAE)
- tricarinatus, Ichthyosarcolites tricarinatus C.F. Parona, 1921 † - (ICHTHYOSARCOLITIDAE) (FOSSIL)
- tricarinatus, Lenotropites tricarinatus Tozer, 1994 † - (LONGOBARDITIDAE) (FOSSIL)
- tricarinatus, Microdoma tricarinatus Sherzer & A.W. Grabau, 1910 † - (MICRODOMATIDAE) (FOSSIL)
- tricarinatus, Pterynotus crenulatus tricarinatus (J.B.P.A. Lamarck, 1803 †) - (MURICIDAE) (FOSSIL)
- tricarinatus, Pecten tricarinatus H.E. Anton, 1838 - syn of: Serratovola rubicunda (C.A. Récluz, 1843) - (PECTINIDAE)
- tricarinatus, Potamidopsis tricarinatus (J.B.P.A. Lamarck, 1804 †) - (POTAMIDIDAE) (FOSSIL)
- tricarinatus, Pseudarietites tricarinatus Ruan, 1981 † - (PSEUDARIETITIDAE) (FOSSIL)
- tricarinatus, Fossarulus tricarinatus Š. Brusina, 1870 † - (RISSOOIDEA (UNASSIGNED)) (FOSSIL)
- tricarinatus, Sukashitrochus tricarinatus I. Yaron, 1983 - syn of: Sukashitrochus dorbignyi (J.V. Audouin, 1826) - (SCISSURELLIDAE)
- tricarinatus, Circulus tricarinatus (J.L.M. Defrance, 1828 †) - (TORNIDAE) (FOSSIL)
- tricarinatus, Cyclostremiscus tricarinatus (C.B. Adams, 1852) - (TORNIDAE)
- tricarinatus, Circulus tricarinatus S.V. Wood, 1848 - syn of: Circulus striatus W.M. Gabb, 1873 - (TORNIDAE)
- tricarinatus, Trochus tricarinatus Klipstein, 1843 † - (TROCHIDAE) (FOSSIL)
- tricarinatus, Trochus tricarinatus J.B.P.A. Lamarck, 1822 - syn of: Euchelus asper quadricarinatus (H.S. Holten, 1802) - (TROCHIDAE)
- tricarinatus, Turbo tricarinatus Münster, 1841 † - syn of: Turbo subcarinatus Münster, 1841 † - (TURBINIDAE) (FOSSIL)
- tricarinatus arenulatis, Potamidopsis tricarinatus arenulatis Boussac, 1905 † - (POTAMIDIDAE) (FOSSIL)
- tricarinatus crispiacensis, Potamidopsis tricarinatus crispiacensis Boussac, 1905 † - (POTAMIDIDAE) (FOSSIL)
- tricarinatus vouastensis, Potamidopsis tricarinatus vouastensis Boussac, 1905 † - (POTAMIDIDAE) (FOSSIL)
- tricarinulatus, Turbo tricarinulatus F.M. Euthyme - syn of: Turbo cidaris J.F. Gmelin, 1791 - (TURBINIDAE)
- tricarinulatus bicarinulatus, Turbo tricarinulatus bicarinulatus F.M. Euthyme, 1885 - syn of: Turbo cidaris J.F. Gmelin, 1791 - (TURBINIDAE)
- tricarnatus, Pseudoperissolax tricarnatus (C.S. Weaver, 1905 †) - (MURICIDAE) (FOSSIL)
- tricassinaeformis, Anodonta tricassinaeformis R. Schröder, 1885 - syn of: Anodonta cygnea (C. Linnaeus, 1758) - (UNIONIDAE)
- tricastinorum, Helicella tricastinorum É.A.A. Locard, 1884 - syn of: Helicella bolenensis É.A.A. Locard, 1882 - (HYGROMIIDAE)
- tricatenaria, Compsodrillia tricatenaria (T.A. Conrad, 1862 †) - (PSEUDOMELATOMIDAE) (FOSSIL)
- tricatenatus, Trochus tricatenatus L.A. Reeve, 1861 - (TROCHIDAE)
- tricavernosa, Cymbulia tricavernosa S.P. Zhang, 1964 - (CYMBULIIDAE)
- tricenaria, Amplirhagada tricenaria F. Köhler, 2010 - (CAMAENIDAE)
- tricenicosta, Anadara tricenicosta (P. Nyst, 1848) - (ARCIDAE)
- tricenicosta, Arca tricenicosta P. Nyst, 1848 - syn of: Anadara tricenicosta (P. Nyst, 1848) - (ARCIDAE)
- triceps, Neoshumardites triceps Ruzhentsev, 1936 † - (SOMOHOLITIDAE) (FOSSIL)
- trichalis, Erectidens trichalis H.A. Pilsbry, 1953 - (POLYGYRIDAE)
- Trichamathina, Genus Trichamathina T. Habe, 1962 (CAPULIDAE)
- Trichelix, syn of: Genus Moellendorffia C.M.F. Ancey, 1887 (CAMAENIDAE)
- Tricheolota, syn of: Genus Tricheulota H.A. Pilsbry, 1895 (BRADYBAENIDAE)
- Tricheulota, Genus Tricheulota H.A. Pilsbry, 1895 (BRADYBAENIDAE)
- Trichia, Genus Trichia J.D.W. Hartmann, 1841 (HYGROMIIDAE)
- Trichia, syn of: Genus Trochulus J.D.W. Hartmann 1840 (HYGROMIIDAE)
- Trichichama, Subgenus Chama (Trichichama) Tapaswi, 1979 (CHAMIDAE)
- Trichifusus, Genus Trichifusus Bandel, 2000 † (FASCIOLARIIDAE) (FOSSIL)
- trichinopolitensis, Hercoglossa trichinopolitensis (Blanford, 1861 †) - (HERCOGLOSSIDAE) (FOSSIL)
- trichinopolitensis, Rimella trichinopolitensis L. Spengler, 1914 † - (RIMELLIDAE) (FOSSIL)
- trichinopolitensis, Voluta trichinopolitensis E. Forbes, 1846 † - (VOLUTIDAE) (FOSSIL)
- Trichiplatula, syn of: Genus Trichiplicatula Chiplonkar & Tapaswi, 1975 † (PLICATULIDAE) (FOSSIL)
- Trichiplicatula, Genus Trichiplicatula Chiplonkar & Tapaswi, 1975 † (PLICATULIDAE) (FOSSIL)
- Trichites, Genus Trichites Lhuyd, 1760 † (PINNIDAE) (FOSSIL)
- Trichobensonia, Subgenus Glyptobensonia (Trichobensonia) O.F. von Möllendorff, 1902 (ARIOPHANTIDAE)
- Trichobradybaena, Genus Trichobradybaena Wu & Guo, 2003 (CAMAENIDAE)
- Trichocathaica, Subgenus Laeocathaica (Trichocathaica) G.P.L.K. Gude, 1919 (BRADYBAENIDAE)
- Trichochloritis, syn of: Genus Chloritis H.H. Beck, 1837 (CAMAENIDAE)
- Trichoconcha, syn of: Genus Torellia S.L. Lovén in J.G. Jeffreys, 1867 (CAPULIDAE)
- Trichocyclus, syn of: Genus Clione P.S. Pallas, 1774 (CLIONIDAE)
- trichoda, Helix trichoda D'Orbigny, 1835 - syn of: Naesiotus trichodes (A.V.M.D. D'Orbigny, 1835) - (HELICIDAE)
- trichodes, Naesiotus trichodes (A.V.M.D. D'Orbigny, 1835) - (BULIMULIDAE)
- trichodes, Microdaphne trichodes (W.H. Dall, 1919) - (RAPHITOMIDAE)
- Trichodina, syn of: Subgenus Bocageia (Petriola) W.H. Dall, 1905 (SUBULINIDAE)
- Trichodiscina, Subgenus Averellia (Trichodiscina) E.C. Von Martens, 1892 (XANTHONYCHIDAE)
- Trichodiscus, syn of: Subgenus Averellia (Trichodiscina) E.C. Von Martens, 1892 (XANTHONYCHIDAE)
- Trichohelicina, Subgenus Helicina (Trichohelicina) W.K. Weyrauch, 1966 (HELICINIDAE)
- Trichomusculus, syn of: Genus Gregariella T.A. de M. Monterosato, 1884 (MYTILIDAE)
- Trichomya, Genus Trichomya H.F.A. von Ihering, 1900 (MYTILIDAE)
- Trichomyella, Genus Trichomyella Cox, 1969 † (PHOLADOMYOIDEA (UNASSIGNED)) (FOSSIL)
- Trichonia, Genus Trichonia H. Schütt, 1980 (HYDROBIIDAE)
- trichoniana, Islamia trichoniana P. Radoman, 1979 - (HYDROBIIDAE)
- trichonica, Trichonia trichonica (P. Radoman, 1973) - (HYDROBIIDAE)
- trichonis, Pseudobithynia trichonis P. Glöer, C. Albrecht & T. Wilke, 2007 - (BITHYNIIDAE)
- Trichosirius, syn of: Genus Trichotropis W.J. Broderip & G.B. Sowerby, 1829 (CAPULIDAE)
- Trichotheba, Subgenus Rhytidotheba (Trichotheba) Neiber & Hausdorf, 2017 (HYGROMIIDAE)
- trichothroa, Helix trichothroa L. Benoit, 1882 - syn of: Campylaea planospira benedicta (W. Kobelt, 1872) - (HELICIDAE)
- trichotomus, Etheripecten trichotomus (Kegel & Costa, 1951 †) - (HETEROPECTINIDAE) (FOSSIL)
- Trichotoxon, Genus Trichotoxon H.R. Simroth, 1889 (UROCYCLIDAE)
- TRICHOTROPIDAE - syn of Family: CAPULIDAE
- trichotropis, Plectotropis trichotropis (L. Pfeiffer, 1850) - (BRADYBAENIDAE)
- Trichotropis, Genus Trichotropis W.J. Broderip & G.B. Sowerby, 1829 (CAPULIDAE)
- trichotropis laciniata, Plectotropis trichotropis laciniata (P.M. Heude, 1882) - (BRADYBAENIDAE)
- trichotropoides, Haloceras trichotropoides A. Warén & P. Bouchet, 1991 - (HALOCERATIDAE)
- trichotropoides, Purpura trichotropoides R.P. Montrouzier in S.M. Souverbie, 1861 - syn of: Coralliophila erosa (P.F. Röding, 1798) - (MURICIDAE)
- trichroa, Helicostyla mirabilis trichroa H.A. Pilsbry, 1892 - (BRADYBAENIDAE)
- trichroa, Pleuropoma trichroa (A.J. Wagner, 1905) - (HELICINIDAE)
- trichroma, Oliva carneola trichroma P. Dautzenberg, 1927 - (OLIVIDAE)
- trichroma, Opimaphora trichroma C.F. Laseron, 1958 - (TRIPHORIDAE)
- trichroma, Leidyula trichroma (F. Baker, 1935) - (VERONICELLIDAE)
- tricincta, Amastra tricincta A. Hyatt & H.A. Pilsbry, 1911 - (AMASTRIDAE)
- tricincta, Tomopleura tricincta S. Gofas & E. Rolán, 2009 - (BORSONIIDAE)
- tricincta, Cirsochilus tricincta (P. Marshall, 1919 †) - (COLLONIIDAE) (FOSSIL)
- tricincta, Clathroscala tricincta (P. Marshall, 1918 †) - (EPITONIIDAE) (FOSSIL)
- tricincta, Papyriscala tricincta A.N. Golikov, 1967 - syn of: Epitonium latifasciatum (G.B. II Sowerby, 1874) - (EPITONIIDAE)
- tricincta, Amberleya tricincta Lycett † - (EUCYCLIDAE) (FOSSIL)
- tricincta, Glatziella tricincta Schindewolf, 1937 † - (GLATZIELLIDAE) (FOSSIL)
- tricincta, Devonorhineoderma tricincta (G.A. Goldfuss, 1844 †) - (GOSSELETINIDAE) (FOSSIL)
- tricincta, Echinolittorina tricincta D.G. Reid, 2007 - (LITTORINIDAE)
- tricincta, Cryptospira tricincta (R.B. Hinds, 1844) - (MARGINELLIDAE)
- tricincta, Marginella tricincta R.B. Hinds, 1844 - syn of: Cryptospira tricincta (R.B. Hinds, 1844) - (MARGINELLIDAE)
- tricincta, Microdoma tricincta Jakowlew, 1899 † - syn of: Microdoma anomalum Jakowlew, 1899 † - (MICRODOMATIDAE) (FOSSIL)
- tricincta, Koloonella tricincta (R. Tate, 1898) - (MURCHISONELLIDAE)
- tricincta, Murchisonia tricincta d'Archiac & de Verneuil, 1842 † - (MURCHISONIIDAE) (FOSSIL)
- tricincta, Cerithiella tricincta P. Marshall, 1919 † - (NEWTONIELLIDAE) (FOSSIL)
- tricincta, Chrysallida tricincta R.A. Philippi - (PYRAMIDELLIDAE)
- tricincta, Chrysallida tricincta J.G. Jeffreys, 1856 - syn of: Odostomella doliolum (R.A. Philippi, 1844) - (PYRAMIDELLIDAE)
- tricincta, Putilla tricincta (A. Adams, 1861) - (SEGUENZIOIDEA (UNASSIGNED))
- tricincta, Granuliterebra tricincta (E.A. Smith, 1877) - (TEREBRIDAE)
- tricincta, Terebra tricincta E.A. Smith, 1877 - syn of: Granuliterebra tricincta (E.A. Smith, 1877) - (TEREBRIDAE)
- tricincta, Viriola tricincta (R.W. Dunker, 1882) - (TRIPHORIDAE)
- tricincta, Triphora tricincta R.W. Dunker, 1882 - syn of: Viriola tricincta (R.W. Dunker, 1882) - (TRIPHORIDAE)
- tricincta, Pleurotoma tricincta G.A. Brugnone, 1862 - syn of: Drilliola loprestiana (P. Calcara, 1841) - (TURRIDAE)
- tricincta, Turritella tricincta Münster, 1841 † - (TURRITELLIDAE) (FOSSIL)
- tricincta, Notopala tricincta (E.A. Smith, 1882) - (VIVIPARIDAE)
- tricincta, Ericusa fulgetrum tricincta J.C. Verco, 1912 - (VOLUTIDAE)
- tricincta bicincta, Odostomia tricincta bicincta N. Tiberi, 1868 - syn of: Odostomella bicincta (N. Tiberi, 1868) - (PYRAMIDELLIDAE)
- tricinctum, Cerithium tricinctum G.B. Brocchi, 1814 † - syn of: Ptychopotamides tricinctus (G.B. Brocchi, 1814 †) - (CERITHIIDAE) (FOSSIL)
- tricinctum, Trochonema tricinctum J. Perner, 1903 † - (TROCHONEMATIDAE) (FOSSIL)
- tricinctus, Bostryx tricinctus L.A. Reeve, 1848 - (BULIMULIDAE)
- tricinctus, Drymaeus poecilus tricinctus J.J. Parodíz, 1962 - (BULIMULIDAE)
- tricinctus, Cystiscus tricinctus F. Boyer, 2003 - (CYSTISCIDAE)
- tricinctus, Bembexia tricinctus (A. Römer, 1843 †) - (EOTOMARIIDAE) (FOSSIL)
- tricinctus, Orthalicus ferussaci tricinctus E.C. Von Martens, 1893 - (ORTHALICIDAE)
- tricinctus, Ptychopotamides tricinctus (G.B. Brocchi, 1814 †) - (POTAMIDIDAE) (FOSSIL)
- tricinctus, Viviparus tricinctus Y.Y. Liu, W.Z. Zhang & Y.X. Wang, 1994 - (VIVIPARIDAE)
- tricingulata, Collonista tricingulata E.C. Von Martens, 1880 - syn of: Collonista purpurata (G.P. Deshayes, 1863) - (COLLONIIDAE)
- tricingulata, Isotriphora tricingulata E. Rolán & R. Fernández-Garcés, 2015 - (TRIPHORIDAE)
- tricingulata, Austrocochlea tricingulata (A. Adams, 1853) - (TROCHIDAE)
- tricingulatum, Ptychocerithium tricingulatum E.W. Vredenburg, 1928 † - (CERITHIIDAE) (FOSSIL)
- tricingulatum, Ataxocerithium tricingulatum J. Marwick, 1924 † - (NEWTONIELLIDAE) (FOSSIL)
- tricingulatum, Orthonema tricingulatum Erwin, 1988 † - (ORTHONEMATIDAE) (FOSSIL)
- tricingulatus, Drymaeus tricingulatus (H.E. Anton, 1839) - (BULIMULIDAE)
- tricingulatus, Clanculus tricingulatus N.H. Ludbrook, 1978 † - (TROCHIDAE) (FOSSIL)
- tricingulatus, Turbo tricingulatus Klipstein, 1843 † - syn of: Turbo subcarinatus Münster, 1841 † - (TURBINIDAE) (FOSSIL)
- Tricla, syn of: Genus Cavolinia P.C. Abildgaard, 1791 (CAVOLINIIDAE)
- Tricla, syn of: Genus Scaphander P.D. Montfort, 1810 (SCAPHANDRIDAE)
- triclava, Lamprotula triclava (P.M. Heude, 1877) - (UNIONIDAE)
- triclotae, Myrtea triclotae R. von Cosel & P. Bouchet, 2008 - (LUCINIDAE)
- triclotae, Dermomurex triclotae (R. Houart, 2001) - (MURICIDAE)
- triclotae, Trialatella triclotae R. Houart, 2001 - syn of: Dermomurex triclotae (R. Houart, 2001) - (MURICIDAE)
- triclotae, Similiphora triclotae P. Bouchet, 1997 - (TRIPHORIDAE)
- Tricola, syn of: Genus Tricolia A. Risso, 1826 (PHASIANELLIDAE)
- Tricolia, Genus Tricolia A. Risso, 1826 (PHASIANELLIDAE)
- Tricoliella, syn of: Genus Tricolia A. Risso, 1826 (PHASIANELLIDAE)
- Tricolietta, Subgenus Tricolia (Tricolietta) H. Nordsieck, 1973 (PHASIANELLIDAE)
- tricollis, Ljudmilena tricollis (A. Mousson, 1876) - (ENIDAE)
- tricollis excellens, Buliminus tricollis excellens O. von Retowski, 1889 - syn of: Ljudmilena tricollis (A. Mousson, 1876) - (ENIDAE)
- TRICOLNATICOPSIDAE Bandel, 2007 † - Family (GASTROPODA-NERITIMORPHA [Subclass]-CYCLONERITIMORPHA [Order]-NERITOPSOIDEA [Superfamily]) (FOSSIL)
- Tricolnaticopsis, Genus Tricolnaticopsis Bandel, 2007 † (TRICOLNATICOPSIDAE) (FOSSIL)
- Tricoloceras, Genus Tricoloceras Whitehouse, 1928 † (PTYCHOCERATIDAE) (FOSSIL)
- tricolor, Achatinellastrum vulpina tricolor E.A. Smith, 1873 - (ACHATINELLIDAE)
- tricolor, Plekocheilus tricolor L. Pfeiffer, 1852 - (AMPHIBULIMIDAE)
- tricolor, Ancillaria tricolor Sowerby, 1859 - syn of: Baryspira nana (R.B. Watson, 1886) - (ANCILLARIIDAE)
- tricolor, Caliphylla tricolor S. Trinchese, 1870 - syn of: Caliphylla mediterranea (A. da Costa, 1867) - (CALIPHYLLIDAE)
- tricolor, Calliostoma tricolor W.M. Gabb, 1865 - (CALLIOSTOMATIDAE)
- tricolor, Crystallopsis tricolor (L. Pfeiffer, 1849) - (CAMAENIDAE)
- tricolor, Amphidromus pervariabilis tricolor A.R.J.B. Bavay & P. Dautzenberg, 1909 - (CAMAENIDAE)
- tricolor, Cardita tricolor G.B. I Sowerby, 1833 - syn of: Cardites laticostatus (G.B. I Sowerby, 1833) - (CARDITIDAE)
- tricolor, Cardites tricolor G.B. I Sowerby, 1833 - syn of: Cardites laticostatus (G.B. I Sowerby, 1833) - (CARDITIDAE)
- tricolor, Ondulopsis tricolor A. Cecalupo & I. Perugia, 2012 - (CERITHIOPSIDAE)
- tricolor, Felimare tricolor (F.J. Cantraine, 1835) - (CHROMODORIDIDAE)
- tricolor, Hypselodoris tricolor F.J. Cantraine, 1835 - syn of: Felimare tricolor (F.J. Cantraine, 1835) - (CHROMODORIDIDAE)
- tricolor, Mexichromis tricolor F.J. Cantraine, 1835 - syn of: Felimare tricolor (F.J. Cantraine, 1835) - (CHROMODORIDIDAE)
- tricolor, Glossodoris tricolor F.J. Cantraine, 1835 - syn of: Felimare tricolor (F.J. Cantraine, 1835) - (CHROMODORIDIDAE)
- tricolor, Lienardia tricolor (J.W. Brazier, 1876) - (CLATHURELLIDAE)
- tricolor, Clathurella tricolor J.W. Brazier, 1876 - syn of: Lienardia tricolor (J.W. Brazier, 1876) - (CLATHURELLIDAE)
- tricolor, Pusia tricolor (J.F. Gmelin, 1791) - (COSTELLARIIDAE)
- tricolor, Pusia tricolor R.P. Montrouzier, 1861 - syn of: Pusia luculentum (L.A. Reeve, 1845) - (COSTELLARIIDAE)
- tricolor, Doris tricolor (K. Baba, 1938) - (DORIDIDAE)
- tricolor, Doris tricolor F.J. Cantraine, 1841 - syn of: Felimare tricolor (F.J. Cantraine, 1835) - (DORIDIDAE)
- tricolor, Bellaspira tricolor P.J. Fallon, 2016 - (DRILLIIDAE)
- tricolor, Eubranchus tricolor E. Forbes, 1838 - (EUBRANCHIDAE)
- tricolor, Niso tricolor W.H. Dall, 1889 - (EULIMIDAE)
- tricolor, Mitra tricolor R.P. Montrouzier, 1861 - syn of: Pusia luculentum (L.A. Reeve, 1845) - (MITRIDAE)
- tricolor, Plaxiphora tricolor K.H.J. Thiele, 1909 - (MOPALIIDAE)
- tricolor, Murex tricolor A. Valenciennes, 1832 - syn of: Takia regius (W.J. Swainson, 1821) - (MURICIDAE)
- tricolor, Nerita tricolor J.F. Gmelin, 1791 - syn of: Nerita versicolor J.F. Gmelin, 1791 - (NERITIDAE)
- tricolor, Oliva tricolor J.B.P.A. Lamarck, 1811 - (OLIVIDAE)
- tricolor, Oliva tricolor P.L. Duclos, 1835 - syn of: Oliva tricolor philantha P.L. Duclos, 1835 - (OLIVIDAE)
- tricolor, Onchidium tricolor H.R. Simroth, 1918 - (ONCHIDIIDAE)
- tricolor, Tricolia tricolor (M.E.J. Bucquoy, P. Dautzenberg & G.F. Dollfus, 1883) - (PHASIANELLIDAE)
- tricolor, Tricolia tricolor T.A. de M. Monterosato, 1884 - syn of: Tricolia pullus (C. Linnaeus, 1758) - (PHASIANELLIDAE)
- tricolor, Polycera tricolor G.A. Robilliard, 1971 - (POLYCERIDAE)
- tricolor, Pirenella tricolor P.M. Pallary, 1904 - syn of: Potamides conicus tricolor P.M. Pallary, 1904 - (POTAMIDIDAE)
- tricolor, Potamides conicus tricolor P.M. Pallary, 1904 - (POTAMIDIDAE)
- tricolor, Raphitoma tricolor A. Risso, 1826 - syn of: Raphitoma linearis (G. Montagu, 1803) - (RAPHITOMIDAE)
- tricolor, Rissoa tricolor A. Risso, 1826 - syn of: Rissoa violacea A.G. Desmarest, 1814 - (RISSOIDAE)
- tricolor, Terebra tricolor G.B. I Sowerby, 1825 - (TEREBRIDAE)
- tricolor, Nanaphora tricolor C.F. Laseron, 1958 - (TRIPHORIDAE)
- tricolor, Mastonia tricolor F.P. Jousseaume, 1884 - (TRIPHORIDAE)
- tricolor, Jujubinus tricolor A. Risso, 1826 - syn of: Jujubinus exasperatus tricolor (A. Risso, 1826) - (TROCHIDAE)
- tricolor, Jujubinus exasperatus tricolor (A. Risso, 1826) - (TROCHIDAE)
- tricolor, Turbo tricolor A. Risso, 1826 - syn of: Melarhaphe neritoides (C. Linnaeus, 1758) - (TURBINIDAE)
- tricolor, Pleurotoma tricolor A. Risso, 1826 - syn of: Raphitoma linearis (G. Montagu, 1803) - (TURRIDAE)
- tricolor, Unio tricolor H.C. Küster, 1856 - syn of: Lamellidens generosus (A.A. Gould, 1847) - (UNIONIDAE)
- tricolor, Anoma tricolor L. Pfeiffer, 1852 - (UROCOPTIDAE)
- tricolor, Venus tricolor W.J. Broderip & G.B. I Sowerby, 1835 - syn of: Leukoma grata (T. Say, 1831) - (VENERIDAE)
- tricolor, Voluta tricolor J.F. Gmelin, 1791 - syn of: Pusia tricolor (J.F. Gmelin, 1791) - (VOLUTIDAE)
- tricolor abbasi, Oliva tricolor abbasi (N.N. Thach & D.P. Berschauer, 2016) - (OLIVIDAE)
- tricolor farrani, Eubranchus tricolor farrani J. Alder & A. Hancock, 1844 - syn of: Eubranchus farrani (J. Alder & A. Hancock, 1844) - (EUBRANCHIDAE)
- tricolor palawanensis, Oliva tricolor palawanensis P. Bartsch, 1918 - (OLIVIDAE)
- tricolor philanta, Oliva tricolor philanta P.L. Duclos, 1835 - syn of: Oliva tricolor philantha P.L. Duclos, 1835 - (OLIVIDAE)
- tricolor philantha, Oliva tricolor philantha P.L. Duclos, 1835 - (OLIVIDAE)
- tricolor subviridis, Oliva tricolor subviridis G. Perry, 1811 - (OLIVIDAE)
- tricolorata, Aglaja tricolorata S.A. Renier, 1807 - (AGLAJIDAE)
- tricolorata, Hypselodoris tricolorata F.J. Cantraine - syn of: Felimare villafranca (A. Risso, 1818) - (CHROMODORIDIDAE)
- tricolorata, Mitromorpha tricolorata B. Amati, C. Smriglio & M. Oliverio, 2015 - (MITROMORPHIDAE)
- tricolorata, Thais tricolorata L. Bozzetti, 2010 - (MURICIDAE)
- tricolore, Pseudaptetoceras tricolore Westermann & Riccardi, 1982 † - (HAMMATOCERATIDAE) (FOSSIL)
- triconcava, Lenatheca triconcava (A.V. Sysoev, 1968 †) - (ORTHOTHECIDAE) (FOSSIL)
- triconica, Splendrillia triconica F.E. Wells, 1995 - (DRILLIIDAE)
- tricoratus, Conus tricoratus R.C. Hoerle, 1976 † - (CONIDAE) (FOSSIL)
- tricordata, Egestas tricordata (A.G. Beu, 1970 †) - (PTYCHATRACTIDAE) (FOSSIL)
- tricordata, Oscilla tricordata (S. Nomura, 1938) - (PYRAMIDELLIDAE)
- tricornis, Pustularia cicercula tricornis F.P. Jousseaume, 1874 - (CYPRAEIDAE)
- Tricornis, Genus Tricornis F.P. Jousseaume, 1886 (STROMBIDAE)
- tricornis, Tricornis tricornis (J. Lightfoot, 1786) - (STROMBIDAE)
- tricornis erythraeensis, Tricornis tricornis erythraeensis E. Romagna-Manoja, 1977 - (STROMBIDAE)
- tricornis indecoratus, Tricornis tricornis indecoratus F.Jr. Lorenz & V. Wiese, 1990 - (STROMBIDAE)
- tricoronis, Vokesimurex tricoronis (S.S. Berry, 1960) - (MURICIDAE)
- tricosa, Helicaulax tricosa (Saul & W.P. Popenoe, 1993 †) - (APORRHAIDAE) (FOSSIL)
- tricosa, Condylocuna tricosa P.U. Middelfart, 2002 - syn of: Benthocardiella io (P. Bartsch, 1915) - (CONDYLOCARDIIDAE)
- tricostalis, Basterotia tricostalis G.B. III Sowerby, 1897 - (BASTEROTIIDAE)
- tricostalis, Chiton tricostalis H.A. Pilsbry, 1894 - (CHITONIDAE)
- tricostalis, Haliotis tricostalis J.B.P.A. Lamarck, 1822 - syn of: Haliotis scalaris (W.E. Leach, 1814) - (HALIOTIDAE)
- tricostata, Callispira tricostata Mazaev, 2011 † - (ACANTHONEMATIDAE) (FOSSIL)
- tricostata, Amathina tricostata J.F. Gmelin, 1791 - syn of: Amathina tricarinata (C. Linnaeus, 1767) - (AMATHINIDAE)
- tricostata, Dimorphosoma tricostata (A.V.M.D. D'Orbigny, 1843 †) - (APORRHAIDAE) (FOSSIL)
- tricostata, Hemitoma tricostata G.B. I Sowerby, 1824 - syn of: Hemitoma octoradiata (J.F. Gmelin, 1791) - (FISSURELLIDAE)
- tricostata, Haliotis tricostata W. Wood, 1828 - syn of: Haliotis scalaris (W.E. Leach, 1814) - (HALIOTIDAE)
- tricostata, Schasicheila vanattai tricostata H.A. Pilsbry, 1903 - (HELICINIDAE)
- tricostata, Glyptospira tricostata Erwin, 1988 † - (MICRODOMATIDAE) (FOSSIL)
- tricostata, Ecphora tricostata Martin, 1904 † - (MURICIDAE) (FOSSIL)
- tricostata, Ecphora tricostata Ward, 1992 † - (MURICIDAE) (FOSSIL)
- tricostata, Jullienia tricostata G.P. Deshayes, 1876 - (POMATIOPSIDAE)
- tricostata, Rostellaria tricostata A.V.M.D. D'Orbigny, 1843 † - syn of: Dimorphosoma tricostata (A.V.M.D. D'Orbigny, 1843 †) - (ROSTELLARIIDAE) (FOSSIL)
- tricostata, Solariella tricostata (T.A. Conrad, 1833 †) - (SOLARIELLIDAE) (FOSSIL)
- tricostata, Turritella tricostata Münster, 1841 † - (TURRITELLIDAE) (FOSSIL)
- tricostata, Paludina tricostata R.P. Lesson, 1831 - (VIVIPARIDAE)
- tricostata, Xenophora tricostata G. Fischer von Waldheim, 1807 - syn of: Xenophora conchyliophora (I. von Born, 1780) - (XENOPHORIDAE)
- tricostatum, Buccinum tricostatum R. Tiba, 1980 - syn of: Buccinum trescostatum R. Tiba, 1980 - (BUCCINIDAE)
- tricostatus, Nodosotrochus tricostatus J. Gründel & A. Nützel, 2015 † - (EUCYCLOSCALIDAE) (FOSSIL)
- tricostatus, Fusus tricostatus Seeley † - (FASCIOLARIIDAE) (FOSSIL)
- tricostatus, Ficus tricostatus G.P. Deshayes, 1835 † - (FICIDAE) (FOSSIL)
- tricostatus, Trochoceramus tricostatus Alencáster & Omaña, 2006 † - (INOCERAMIDAE) (FOSSIL)
- tricostatus, Potamolithus tricostatus (A. Brot, 1867) - (LITHOGLYPHIDAE)
- tricostatus, Murex tricostatus G. Fischer von Waldheim, 1807 - syn of: Chicoreus virgineus (P.F. Röding, 1798) - (MURICIDAE)
- tricostatus, Abyssotrophon tricostatus R.V. Egorov, 1993 - syn of: Abyssotrophon soyoae (T.A. Okutani, 1959) - (MURICIDAE)
- tricostatus, Didymoceras tricostatus (R.P. Whitfield, 1897 †) - (NOSTOCERATIDAE) (FOSSIL)
- tricostatus, Pectinatites tricostatus Mesezhnikov, 1984 † - (PERISPHINCTIDAE) (FOSSIL)
- tricostatus, Turbo tricostatus F.W. Hutton, 1884 - syn of: Turbo petholatus C. Linnaeus, 1758 - (TURBINIDAE)
- tricostatus, Anodon tricostatus G.B. Sowerby, 1870 - syn of: Sinanodonta woodiana (I. Lea, 1834) - (UNIONIDAE)
- tricostulatus, Wheatleyites tricostulatus Buckman † - (AMMONOIDEA (UNASSIGNED)) (FOSSIL)
- tricosum, Claviderma tricosum A.H. Scheltema & D. Ivanov, 2000 - (PROCHAETODERMATIDAE)
- tricristatum, Richeiceras tricristatum (Oppel, 1863 †) - (OPPELIIDAE) (FOSSIL)
- Tricula, Genus Tricula W.H. Benson, 1843 (POMATIOPSIDAE)
- triculiformis, Nurekia triculiformis Z.I. Izzatullaev, T.Y. Sitnikova & Y.I. Starobogatov, 1985 - (HYDROBIIDAE)
- tricuspe, Stephopoma tricuspe O.A.L. Mörch, 1861 - (VERMETIDAE)
- tricuspe, Vermetus tricuspe G.B. Sowerby, 1892 - syn of: Stephopoma quincunx (K.H. Barnard, 1963) - (VERMETIDAE)
- tricuspidata, Armina tricuspidata T.E. Thompson, G. Cattaneo & Y.M. Wong, 1990 - (ARMINIDAE)
- tricuspidata, Vaginella tricuspidata Zorn & Janssen, 1993 † - (CAVOLINIIDAE) (FOSSIL)
- tricuspidata, Squamatoherpia tricuspidata T. Büchinger & C. Handl, 1996 - (DONDERSIIDAE)
- tricuspidata, Chondrula microtragus tricuspidata H.C. Küster, 1846 - (ENIDAE)
- tricuspidatus, Pterynotus crenulatus tricuspidatus G.P. Deshayes, 1835 † - (MURICIDAE) (FOSSIL)
- tricuspis, Cryptaulax tricuspis (F. Schröder, 1995 †) - (CRYPTAULACIDAE) (FOSSIL)
- tricuspis, Procerithium tricuspis F. Schröder, 1995 † - syn of: Cryptaulax tricuspis (F. Schröder, 1995 †) - (PROCERITHIIDAE) (FOSSIL)
- tricuspis, Tapes tricuspis (K.E.I. von Eichwald, 1829 †) - (VENERIDAE) (FOSSIL)
- tricyclica, Diplotheca tricyclica Bergesch & Moestrup, 2008 † - (DIPLOTHECIDAE) (FOSSIL)
- Tridachia, syn of: Genus Elysia A. Risso, 1818 (PLAKOBRANCHIDAE)
- Tridachiella, syn of: Genus Elysia A. Risso, 1818 (PLAKOBRANCHIDAE)
- Tridachnes, syn of: Genus Tridacna J.G. Bruguière, 1797 (TRIDACNIDAE)
- tridacna, Notoplax tridacna (A. de Rochebrune, 1881) - (ACANTHOCHITONIDAE)
- Tridacna, Genus Tridacna J.G. Bruguière, 1797 (TRIDACNIDAE)
- tridacnaeformis, Nicaisolopha tridacnaeformis (Cox, 1927) - (OSTREIDAE)
- tridacnaeformis, Ostrea tridacnaeformis L.R. Cox, 1927 - syn of: Nicaisolopha tridacnaeformis (Cox, 1927) - (OSTREIDAE)
- TRIDACNIDAE Lamarck, 1819 - Family (BIVALVIA-HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-VENERIDA [Order]-CARDIOIDEA [Superfamily])
- tridacniformis, Condylocardia tridacniformis C. Salas & E. Rolán, 1990 - (CONDYLOCARDIIDAE)
- Tridacnodites, syn of: Genus Tridacna J.G. Bruguière, 1797 (TRIDACNIDAE)
- tridacnoides, Cardita tridacnoides K.T. Menke, 1843 - syn of: Cardita crassicosta (J.B.P.A. Lamarck, 1819) - (CARDITIDAE)
- tridacnoides, Venus tridacnoides J.F. Gmelin, 1791 - syn of: Mercenaria campechiensis (J.F. Gmelin, 1791) - (VENERIDAE)
- tridacnoides, Mercenaria campechiensis tridacnoides J.B.P.A. Lamarck, 1818 - (VENERIDAE)
- tridacnula, Carditella tridacnula P.G. Oliver & H.C.G. Chesney, 1997 - (CONDYLOCARDIIDAE)
- tridactila, Onchidoris tridactila J.A. Ortea & E. Ballesteros, 1982 - (ONCHIDORIDIDAE)
- tridactyla, Aporrhais tridactyla (A. Braun, 1850 †) - (APORRHAIDAE) (FOSSIL)
- tridactyla, Trietteia tridactyla (Buvignier, 1843 †) - (APORRHAIDAE) (FOSSIL)
- tridactyla, Dicroloma tridactyla Buvignier, 1843 † - syn of: Trietteia tridactyla (Buvignier, 1843 †) - (APORRHAIDAE) (FOSSIL)
- tridactyla, Rostellaria tridactyla Buvignier, 1843 † - syn of: Trietteia tridactyla (Buvignier, 1843 †) - (ROSTELLARIIDAE) (FOSSIL)
- tridactyla, Sonninia tridactyla Buckman † - (SONNINIIDAE) (FOSSIL)
- tridactylus, Undoriptera tridactylus A.V. Guzhov, 2014 † - (APORRHAIDAE) (FOSSIL)
- Tridactylus, Genus Tridactylus Gardner, 1875 † (CAENOGASTROPODA (UNASSIGNED)) (FOSSIL)
- tridadina, Drillia tridadina W.C. Mansfield, 1925 † - (DRILLIIDAE) (FOSSIL)
- tridens, Arcestes tridens Rothpletz, 1892 † - syn of: Stacheoceras tridens (Rothpletz, 1892 †) - (ARCESTIDAE) (FOSSIL)
- tridens, Nenia tridens (A. Schweigger, 1820) - (CLAUSILIIDAE)
- tridens, Azeca tridens R. Pulteney, 1799 - syn of: Azeca goodalli (A.E.J. Férussac, 1821) - (COCHLICOPIDAE)
- tridens, Opisthostoma tridens J.J. Vermeulen, 1991 - (DIPLOMMATINIDAE)
- tridens, Pedipes tridens L. Pfeiffer, 1854 - syn of: Pedipes ovalis C.B. Adams, 1849 - (ELLOBIIDAE)
- tridens, Chondrula tridens (O.F. Müller, 1774) - (ENIDAE)
- tridens, Helix tridens O.F. Müller, 1774 - syn of: Chondrula tridens (O.F. Müller, 1774) - (HELICIDAE)
- tridens, Helicina tridens G.B. Sowerby, 1866 - syn of: Lucidella nana L. Pfeiffer, 1857 - (HELICINIDAE)
- tridens, Helicodiscus tridens J.P.E. Morrison, 1935 - (HELICODISCIDAE)
- tridens, Stacheoceras tridens (Rothpletz, 1892 †) - (NEOSTACHEOCERATIDAE) (FOSSIL)
- tridens, Spixia tridens P.H. Scott, 1967 - (ODONTOSTOMIDAE)
- tridens, Proplanulites tridens Buckman † - (PERISPHINCTIDAE) (FOSSIL)
- tridens, Pharciceras tridens (C.L.F. von Sandberger & C.L.F. von Sandberger, 1850 †) - (PHARCICERATIDAE) (FOSSIL)
- tridens, Pholadidea tridens (J.E. Gray, 1843) - (PHOLADIDAE)
- tridens, Heligmopsis tridens Arnaud † - (PTERIIDA (UNASSIGNED)) (FOSSIL)
- tridens, Acanthoscaphites tridens (Kner, 1848 †) - (SCAPHITIDAE) (FOSSIL)
- tridens, Sepiola tridens Heij & J. Goud, 2010 - (SEPIOLIDAE)
- tridens, Gulella tridens M. Connolly, 1939 - syn of: Gulella leucocion M. Connolly, 1929 - (STREPTAXIDAE)
- tridens, Paravitrea tridens H.A. Pilsbry, 1946 - (ZONITIDAE)
- tridens albolimbata, Chondrula tridens albolimbata (L. Pfeiffer, 1859) - (ENIDAE)
- tridens intermedia, Gulella tridens intermedia M. Connolly, 1939 - syn of: Gulella leucocion M. Connolly, 1929 - (STREPTAXIDAE)
- tridens martynovi, Chondrula tridens martynovi N. Gural-Sverlova & R.I. Gural, 2010 - (ENIDAE)
- tridens terkensis, Chondrula tridens terkensis O. von Retowski, 1914 - syn of: Chondrula tridens (O.F. Müller, 1774) - (ENIDAE)
- tridensCLF, Goniatites tridensCLF von Sandberger, 1850 † - syn of: Pharciceras tridens (C.L.F. von Sandberger & C.L.F. von Sandberger, 1850 †) - (GONIATITIDAE) (FOSSIL)
- Tridensiana, syn of: Genus Chondrula H.H. Beck, 1837 (ENIDAE)
- tridentalis, Pupilla tridentalis A. Michaud, 1831 - syn of: Pupilla triplicata (S.E. Studer, 1820) - (PUPILLIDAE)
- Tridentarius, Genus Tridentarius G.C. Kronenberg & G.J. Vermeij, 2002 (STROMBIDAE)
- tridentata, Marathonites tridentata Ruzhentsev, 1933 † - syn of: Kargalites typicus (Ruzhentsev, 1933 †) - (ADRIANITIDAE) (FOSSIL)
- tridentata, Anomia tridentata P. Forsskål in C. Niebuhr, 1775 - syn of: Cavolinia tridentata (P. Forsskål in C. Niebuhr, 1775) - (ANOMIIDAE)
- tridentata, Pollia tridentata (M. Tuomey & F.S. Holmes, 1858 ) - (BUCCINIDAE)
- tridentata, Pleuromeris tridentata (T. Say, 1826) - (CARDITIDAE)
- tridentata, Cardita tridentata F.S. Holmes, 1860 † - (CARDITIDAE) (FOSSIL)
- tridentata, Cardita tridentata L.A. Reeve, 1843 - syn of: Purpurocardia purpurata (G.P. Deshayes, 1854) - (CARDITIDAE)
- tridentata, Cavolinia tridentata (P. Forsskål in C. Niebuhr, 1775) - (CAVOLINIIDAE)
- tridentata, Thetidos tridentata A.E. Fedosov & N. Puillandre, 2012 - (CLATHURELLIDAE)
- tridentata, Pertusiconcha tridentata S.D. Chistikov, 1982 - (ENTALINIDAE)
- tridentata, Hydroginella tridentata (R. Tate, 1878) - (MARGINELLIDAE)
- tridentata, Serrata tridentata R. Tate, 1878 - syn of: Hydroginella tridentata (R. Tate, 1878) - (MARGINELLIDAE)
- tridentata, Volvarina tridentata R. Tate, 1878 - syn of: Hydroginella tridentata (R. Tate, 1878) - (MARGINELLIDAE)
- tridentata, Triodopsis tridentata (T. Say, 1816) - (POLYGYRIDAE)
- tridentata, Turbonilla tridentata (P.P. Carpenter, 1864) - (PYRAMIDELLIDAE)
- tridentata, Ringicula tridentata R.J.L. Guppy, 1873 - syn of: Ringicula semistriata A.V.M.D. D'Orbigny, 1842 - (RINGICULIDAE)
- tridentata, Zilchistrophia tridentata (W.K. Weyrauch, 1960) - (SCOLODONTIDAE)
- tridentata, Tegula tridentata (V.L.V. Potiez & A. Michaud, 1838) - (TEGULIDAE)
- tridentata, Vertigo tridentata A.J.C. Wolf, 1870 - (VERTIGINIDAE)
- tridentata, Zebina tridentata (A. Michaud, 1830) - (ZEBINIDAE)
- tridentata affinis, Cavolinia tridentata affinis D'Orbigny, 1836 - syn of: Cavolinia tridentata (P. Forsskål in C. Niebuhr, 1775) - (CAVOLINIIDAE)
- tridentata atlantica, Cavolinia tridentata atlantica S. Van Der Spoel, 1974 - (CAVOLINIIDAE)
- tridentata bermudensis, Cavolinia tridentata bermudensis S. Van Der Spoel, 1974 - syn of: Cavolinia tridentata (P. Forsskål in C. Niebuhr, 1775) - (CAVOLINIIDAE)
- tridentata crassilabrum, Rissoina tridentata crassilabrum A. Garrett, 1857 - syn of: Rissoina crassilabrum (A. Garrett, 1857) - (RISSOINIDAE)
- tridentata dakarensis, Cavolinia tridentata dakarensis S. Van Der Spoel, 1974 - (CAVOLINIIDAE)
- tridentata danae, Cavolinia tridentata danae S. Van Der Spoel, 1974 - syn of: Cavolinia tridentata (P. Forsskål in C. Niebuhr, 1775) - (CAVOLINIIDAE)
- tridentata decemcostata, Pleuromeris tridentata decemcostata T.A. Conrad, 1867 † - syn of: Pleuromeris decemcostata T.A. Conrad, 1867 † - (CARDITIDAE) (FOSSIL)
- tridentata edentilabris, Triodopsis tridentata edentilabris H.A. Pilsbry, 1894 - (POLYGYRIDAE)
- tridentata kraussi, Cavolinia tridentata kraussi J.J. Tesch, 1913 - syn of: Cavolinia tridentata (P. Forsskål in C. Niebuhr, 1775) - (CAVOLINIIDAE)
- tridentata occidentalis, Cavolinia tridentata occidentalis W.H. Dall, 1908 - (CAVOLINIIDAE)
- tridentata platea, Cavolinia tridentata platea J.J. Tesch, 1948 - syn of: Cavolinia tridentata (P. Forsskål in C. Niebuhr, 1775) - (CAVOLINIIDAE)
- tridentata teschi, Cavolinia tridentata teschi S. Van Der Spoel, 1974 - syn of: Cavolinia tridentata (P. Forsskål in C. Niebuhr, 1775) - (CAVOLINIIDAE)
- tridentatum, Cerion tridentatum H.A. Pilsbry & E.G. Vanatta, 1895 - (CERIONIDAE)
- tridentatum, Saraphia tridentatum (A. Risso, 1826) - (ELLOBIIDAE)
- tridentatum, Canarium tridentatum J.F. Gmelin, 1791 - syn of: Tridentarius dentatus (C. Linnaeus, 1758) - (STROMBIDAE)
- tridentatum costellatum, Cerion tridentatum costellatum H.A. Pilsbry, 1946 - (CERIONIDAE)
- tridentatum elongatum, Saraphia tridentatum elongatum (A. Villa & J. Villa, 1841) - (ELLOBIIDAE)
- tridentatum rocai, Cerion tridentatum rocai W.J. Clench & C.G. Aguayo, 1953 - (CERIONIDAE)
- tridentatus, Diaplococeras tridentatus Golubic, 1998 † - (CERATITIDA (UNASSIGNED)) (FOSSIL)
- tridentatus, Boucardicus tridentatus K.C. Emberton & T.A. Pearce, 1999 - (CYCLOPHORIDAE)
- tridentatus, Melampus tridentatus Edwards, 1852 † - (ELLOBIIDAE) (FOSSIL)
- tridentatus, Ischnochiton tridentatus H.A. Pilsbry, 1893 - (ISCHNOCHITONIDAE)
- tridentatus, Ocenebra tridentatus R. Tate, 1888 † - (MURICIDAE) (FOSSIL)
- tridentatus, Parapronorites tridentatus Schulga-Nesterenko, 1916 † - syn of: Neopronorites permicus (Tchernow, 1907 †) - (PRONORITIDAE) (FOSSIL)
- tridentatus, Strombus tridentatus J.F. Gmelin, 1791 - syn of: Tridentarius dentatus (C. Linnaeus, 1758) - (STROMBIDAE)
- Tridentifera, Genus Tridentifera W.F. Ponder, 1966 (RASTODENTIDAE)
- tridentiformis, Azeca tridentiformis F. Gottschick, 1911 † - (COCHLICOPIDAE) (FOSSIL)
- tridentiformis austriaca, Azeca tridentiformis austriaca Lueger, 1981 † - (COCHLICOPIDAE) (FOSSIL)
- tridentina, Helix tridentina A.E.J. Férussac, 1832 - (HELICIDAE)
- tridentina, Pleurodonte tridentina (A.E.J. Férussac in L. Pfeiffer, 1842) - (PLEURODONTIDAE)
- tridentina subsloaneana, Succinea tridentina subsloaneana H.A. Pilsbry, 1889 - syn of: Pleurodonte tridentina (A.E.J. Férussac in L. Pfeiffer, 1842) - (SUCCINEIDAE)
- tridentinum, Vitrinobrachium tridentinum L. Forcart, 1956 - (VITRINIDAE)
- tridentinus, Wasatchites tridentinus Spath, 1934 † - (PRIONITIDAE) (FOSSIL)
- Tridentistrophia, syn of: Subgenus Cerion (Diacerion) W.H. Dall, 1894 (CERIONIDAE)
- Tridentites, Genus Tridentites † (PROLECANITIDA (UNASSIGNED)) (FOSSIL)
- tridesmia, Crockerella tridesmia (S.S. Berry, 1941) - (CLATHURELLIDAE)
- tridigitata, Alaria tridigitata L.É.S. Piette, 1905 † - syn of: Dicroloma tridigitatum (L.É.S. Piette, 1905 †) - (APORRHAIDAE) (FOSSIL)
- tridigitatua, Pterocera tridigitatua L.É.S. Piette, 1905 † - syn of: Dicroloma tridigitatum (L.É.S. Piette, 1905 †) - (STROMBIDAE) (FOSSIL)
- tridigitatum, Dicroloma tridigitatum (L.É.S. Piette, 1905 †) - (APORRHAIDAE) (FOSSIL)
- Tridonax, syn of: Genus Donax C. Linnaeus, 1758 (DONACIDAE)
- Tridonta, syn of: Genus Astarte J. de C. Sowerby, 1816 (ASTARTIDAE)
- Tridopsis, syn of: Genus Triodopsis C.S. Rafinesque, 1819 (POLYGYRIDAE)
- tridorsatum, Peroniceras tridorsatum (F. Schlüter, 1867 †) - (COLLIGNONICERATIDAE) (FOSSIL)
- Triellsiphon, syn of: Genus Siphonaria G.B. Sowerby, 1823 (SIPHONARIIDAE)
- triembola, Parreysia triembola W.H. Benson, 1855 - (UNIONIDAE)
- Triendoceras, Genus Triendoceras Flower , 1958 † (ENDOCERATIDAE) (FOSSIL)
- triens, Prionoceras triens W. Korn, Bockwinkel & Ebbighausen, 2014 † - (PRIONOCERATIDAE) (FOSSIL)
- trieres, Calliotropis trieres C. Vilvens, 2007 - (CALLIOTROPIDAE)
- Trietteia, Subgenus Pietteia (Trietteia) Conti & Szabó, 1987 † (APORRHAIDAE) (FOSSIL)
- trifaciata, Exilia trifaciata F. Traub, 1938 † - (PTYCHATRACTIDAE) (FOSSIL)
- Trifaricardium, Genus Trifaricardium J.T. Kuroda & T. Habe, 1951 (CARDIIDAE)
- trifascialis, Murex trifascialis J.P.S. Grateloup, 1840 † - (MURICIDAE) (FOSSIL)
- trifasciata, Barleeia trifasciata T. Habe, 1960 - (BARLEEIIDAE)
- trifasciata, Engina trifasciata (L.A. Reeve, 1846) - (BUCCINIDAE)
- trifasciata, Bulla trifasciata G.B. II Sowerby, 1868 - syn of: Bulla ampulla C. Linnaeus, 1758 - (BULLIDAE)
- trifasciata, Beddomea trifasciata (J.F. Gmelin, 1786) - (CAMAENIDAE)
- trifasciata, Mauritia trifasciata J.F. Gmelin, 1791 - syn of: Mauritia mauritiana (C. Linnaeus, 1758) - (CYPRAEIDAE)
- trifasciata, Epitonium trifasciata G.B. II Sowerby, 1844 - syn of: Epitonium clementinum (J.P.S. Grateloup, 1840) - (EPITONIIDAE)
- trifasciata, Eulima trifasciata Auct. non J. Adams, 1800 - syn of: Eulima bilineata J. Alder, 1848 - (EULIMIDAE)
- trifasciata, Eulima trifasciata J. Adams, 1800 - syn of: Cingula trifasciata (J. Adams, 1800) - (EULIMIDAE)
- trifasciata, Plebecula trifasciata R.T. Lowe, 1855 - syn of: Actinella nitidiuscula (G.B. I Sowerby, 1824) - (HYGROMIIDAE)
- trifasciata, Tenaturris trifasciata L.A. Reeve, 1845 - syn of: Tenaturris trilineata (C.B. Adams, 1845) - (MANGELIIDAE)
- trifasciata, Zemelanopsis trifasciata (J.E. Gray, 1843) - (MELANOPSIDAE)
- trifasciata, Bullia trifasciata E.A. Smith, 1904 - (NASSARIIDAE)
- trifasciata, Nassa trifasciata A. Adams, 1853 - syn of: Nassarius vinctus (F.P. Marrat, 1877) - (NASSARIIDAE)
- trifasciata, Nassa trifasciata J.F. Gmelin, 1791 - syn of: Nassarius dorsatus (P.F. Röding, 1798) - (NASSARIIDAE)
- trifasciata, Nassa trifasciata Mac Andrew, 1856 † - syn of: Tritia ovoidea (É.A.A. Locard, 1886 †) - (NASSARIIDAE) (FOSSIL)
- trifasciata, Tritia trifasciata A. Adams, 1853 - syn of: Nassarius vinctus (F.P. Marrat, 1877) - (NASSARIIDAE)
- trifasciata, Theodoxus trifasciata K.T. Menke, 1828 - syn of: Theodoxus fluviatilis (C. Linnaeus, 1758) - (NERITIDAE)
- trifasciata, Planaxis trifasciata A. Risso, 1826 † - syn of: Tritia corniculum (A.G. Olivi, 1792 †) - (PLANAXIDAE) (FOSSIL)
- trifasciata, Gari trifasciata J.F. Gmelin, 1791 - syn of: Gari fervensis (J.F. Gmelin, 1791) - (PSAMMOBIIDAE)
- trifasciata, Tiberia trifasciata (C.B. Adams, 1863) - (PYRAMIDELLIDAE)
- trifasciata, Cingula trifasciata (J. Adams, 1800) - (RISSOIDAE)
- trifasciata, Tellina trifasciata C. Linnaeus, 1758 - syn of: Donax trifasciatus (C. Linnaeus, 1758) - (TELLINIDAE)
- trifasciata, Lachryma trifasciata B.C. Cotton & F.C. Godfrey, 1932 - syn of: Proterato lachryma (G.B. II Sowerby, 1832) - (TRIVIIDAE)
- trifasciata rupestris, Cingula trifasciata rupestris (E. Forbes, 1840) - (RISSOIDAE)
- trifasciatum, Buccinum trifasciatum J.F. Gmelin, 1791 - syn of: Nassarius dorsatus (P.F. Röding, 1798) - (BUCCINIDAE)
- trifasciatus, Bulimulus trifasciatus W.E. Leach, 1814 - (BULIMULIDAE)
- trifasciatus, Donax trifasciatus (C. Linnaeus, 1758) - (DONACIDAE)
- trifasciatus, Donax trifasciatus A. Risso, 1826 - syn of: Donax semistriatus G.S. Poli, 1795 - (DONACIDAE)
- trifasciatus, Nassarius trifasciatus A. Adams, 1853 - syn of: Nassarius elatus (A.A. Gould, 1845) - (NASSARIIDAE)
- trifasciatus, Theodoxus trifasciatus (J.P.S. Grateloup, 1839 †) - (NERITIDAE) (FOSSIL)
- trifasciatus, Turbo trifasciatus J. Adams, 1800 - syn of: Cingula trifasciata (J. Adams, 1800) - (TURBINIDAE)
- Trifaux, Genus Trifaux F.C. Baker, 1935 (SAGDIDAE)
- trifibra, Baylea trifibra Rollins, 1975 † - (GOSSELETINIDAE) (FOSSIL)
- trifida, Dicroloma trifida (B. Phillips, 1829 †) - (APORRHAIDAE) (FOSSIL)
- trifida, Alaria trifida B. Phillips in Morris & J. Lycett, 1851 † - syn of: Dicroloma cirrus (Eudes-Deslongchamps, 1843 †) - (APORRHAIDAE) (FOSSIL)
- trifida, Ceratosoma trifida J.E. Gray, 1850 - syn of: Ceratosoma trilobatum (J.E. Gray, 1827) - (CHROMODORIDIDAE)
- trifida, Doris trifida J.E. Gray, 1850 - syn of: Ceratosoma trilobatum (J.E. Gray, 1827) - (DORIDIDAE)
- trifida, Tripoplax trifida (P.P. Carpenter, 1864) - (ISCHNOCHITONIDAE)
- trifida, Chlamys trifida R.W. Dunker, 1877 - syn of: Pecten jickelii R.W. Dunker, 1882 - (PECTINIDAE)
- trifida, Odostomia trifida J.G. Totten, 1834 - syn of: Boonea bisuturalis (T. Say, 1822) - (PYRAMIDELLIDAE)
- trifida, Rostellaria trifida B. Phillips, 1829 † - syn of: Dicroloma trifida (B. Phillips, 1829 †) - (ROSTELLARIIDAE) (FOSSIL)
- trifida, Rostellaria trifida Eudes-Deslongchamps, 1842 † - syn of: Dicroloma eudesii (L.É.S. Piette, 1864 †) - (ROSTELLARIIDAE) (FOSSIL)
- trifidium, Vepricardium trifidium G.P. Deshayes, 1858 † - syn of: Orthocardium trifidum (G.P. Deshayes, 1858 †) - (CARDIIDAE) (FOSSIL)
- trifidum, Cacheoceras trifidum Flower, 1968 † - (ALLOTRIOCERATIDAE) (FOSSIL)
- trifidum, Peltoceras trifidum F.A. von Quenstedt, 1887 † - (ASPIDOCERATIDAE) (FOSSIL)
- trifidum, Orthocardium trifidum (G.P. Deshayes, 1858 †) - (CARDIIDAE) (FOSSIL)
- trifidum, Labeceras trifidum Whitehouse, 1926 † - (LABECERATIDAE) (FOSSIL)
- trifidus, Epihoplites trifidus (Spath 1923 †) - (HOPLITIDAE) (FOSSIL)
- trifidus, Trachydermon trifidus P.P. Carpenter, 1864 - syn of: Tripoplax trifida (P.P. Carpenter, 1864) - (LEPIDOCHITONIDAE)
- trifidus, Aktubites trifidus Ruzhentsev, 1955 † - (PARASHUMARDITIDAE) (FOSSIL)
- trifidus, Unio trifidus I. Lea, 1860 - syn of: Diplodon parallelopipedon (I. Lea, 1834) - (UNIONIDAE)
- trifilaris, Pilorcula trifilaris (A. Mousson, 1856) - (ORCULIDAE)
- trifilaris, Trochozonites trifilaris C. Dupuis & S. Putzeys, 1902 - (UROCYCLIDAE)
- trifilaris ituriensis, Trochozonites trifilaris ituriensis H.A. Pilsbry, 1919 - (UROCYCLIDAE)
- trifilaris longior, Pilorcula trifilaris longior B. Hausdorf, 1996 - (ORCULIDAE)
- trifilaris quadrifilaris, Pilorcula trifilaris quadrifilaris (O.W. Von Rosen, 1905) - (ORCULIDAE)
- trifilata, Peruvispira trifilata (J.B.M. Dana 1847 †) - (GOSSELETINIDAE) (FOSSIL)
- trifilata, Pleurotomaria trifilata J.B.M. Dana, 1847 † - syn of: Peruvispira trifilata (J.B.M. Dana 1847 †) - (PLEUROTOMARIIDAE) (FOSSIL)
- trifilis, Clio trifilis F.H. Troschel, 1854 - syn of: Cavolinia tridentata (P. Forsskål in C. Niebuhr, 1775) - (CLIIDAE)
- trifilosa, Zafrona trifilosa (E.A. Smith, 1882) - (COLUMBELLIDAE)
- trifilosa, Pleurotoma trifilosa E.A. Smith, 1882 - syn of: Zafrona trifilosa (E.A. Smith, 1882) - (TURRIDAE)
- trifoliata, Austrocardiella trifoliata (C. Hedley, 1906) - (CONDYLOCARDIIDAE)
- trifoliata, Condylocardia trifoliata C. Hedley, 1906 - syn of: Austrocardiella trifoliata (C. Hedley, 1906) - (CONDYLOCARDIIDAE)
- trifoliatum, Phylloceras trifoliatum M. von Neumayr, 1871 † - (PHYLLOCERATIDAE) (FOSSIL)
- trifolium, Altrix trifolium (W.H. Dall, 1881) - (FISSURELLIDAE)
- trifolium, Puncturella trifolium W.H. Dall, 1881 - syn of: Altrix trifolium (W.H. Dall, 1881) - (FISSURELLIDAE)
- TRIFORIDAE - syn of Family: TRIPHORIDAE
- triforis, Triphora triforis Orbigny, 1850 † - (TRIPHORIDAE) (FOSSIL)
- Triforis, syn of: Genus Triphora H.M.D. De Blainville, 1828 (TRIPHORIDAE)
- triforme, Discors triforme (Sowerby, 1840 †) - (CARDIIDAE) (FOSSIL)
- triformis, Arctohungarites triformis (Mojsisovics, 1886 †) - (LONGOBARDITIDAE) (FOSSIL)
- triformis, Pterochelus triformis (L.A. Reeve, 1845) - (MURICIDAE)
- triformis, Lanceolaria triformis (P.M. Heude, 1877) - (UNIONIDAE)
- trifractus, Orthalicus princeps trifractus (H.A. Pilsbry, 1899) - (ORTHALICIDAE)
- trifuniculata, Chrysallida trifuniculata (E. Saurin, 1962) - (PYRAMIDELLIDAE)
- trifurcata, Cyrtorostra trifurcata (Reed, 1944 †) - (DELTOPECTINIDAE) (FOSSIL)
- trifurcata, Blanfordinia trifurcata Reed, 1944 † - syn of: Cyrtorostra trifurcata (Reed, 1944 †) - (DELTOPECTINIDAE) (FOSSIL)
- Trifurcatoceras, Genus Trifurcatoceras Obata, 1940 † (ENDOCERIDA (UNASSIGNED)) (FOSSIL)
- trifurcatum, Rhytidoceras trifurcatum M. Collignon, 1951 † - syn of: Erioliceras elegans (Van Hoepen, 1955 †) - (BRANCOCERATIDAE) (FOSSIL)
- trifurcatum, Christioceras trifurcatum Nassichuk & Furnish, 1965 † - (CHRISTIOCERATIDAE) (FOSSIL)
- trifurcatum, Yinoceras trifurcatum W.C. Zhou, 1985 † - (PSEUDOHALORITIDAE) (FOSSIL)
- trifurcatus, Colchidites trifurcatus Kakabadze, 1971 † - (ANCYLOCERATIDAE) (FOSSIL)
- trifurcatus, Acanthohoplites trifurcatus M. Collignon, 1962 † - (DESHAYESITIDAE) (FOSSIL)
- trifurgatus, Bigotites trifurgatus Buckman † - (PERISPHINCTIDAE) (FOSSIL)
- trigalensis, Polymesoda trigalensis A.A. Olsson, 1931 † - (CYRENIDAE) (FOSSIL)
- trigalensis, Mytilopsis trigalensis A.A. Olsson, 1931 † - (DREISSENIDAE) (FOSSIL)
- trigammephora, Epiphragmophora trigammephora (A.V.M.D. D'Orbigny, 1835) - (EPIPHRAGMOPHORIDAE)
- trigammophora, Epiphragmophora trigammophora A.V.M.D. D'Orbigny, 1835 - syn of: Epiphragmophora trigammephora (A.V.M.D. D'Orbigny, 1835) - (EPIPHRAGMOPHORIDAE)
- triganceae, Galeodea triganceae R.K. Dell, 1953 - (CASSIDAE)
- trigeminata, Cerithiopsis trigeminata G.P. Deshayes, 1864 † - (CERITHIOPSIDAE) (FOSSIL)
- trigeri, Valvata trigeri G.P. Deshayes, 1862 † - (VALVATIDAE) (FOSSIL)
- triggi, Conus triggi B.C. Cotton, 1945 - syn of: Ximeniconus ximenes (J.E. Gray, 1839) - (CONIDAE)
- triggi, Eulima triggi B.C. Cotton & F.C. Godfrey, 1932 - (EULIMIDAE)
- triggi, Myadora triggi B.C. Cotton & F.C. Godfrey, 1938 - syn of: Myadora brevis (G.B. I Sowerby, 1827) - (MYOCHAMIDAE)
- triggi, Mesopeplum triggi B.C. Cotton & F.C. Godfrey, 1938 - syn of: Mesopeplum fenestratum (C. Hedley, 1901) - (PECTINIDAE)
- Triginella, Genus Triginella C.F. Laseron, 1957 (MARGINELLIDAE)
- trigintanaria, Scalina trigintanaria (T.A. Conrad, 1848 †) - (EPITONIIDAE) (FOSSIL)
- trigintaradiata, Aequipecten trigintaradiata (Sowerby, 1850 †) - (PECTINIDAE) (FOSSIL)
- triglandulata, Nematomenia triglandulata L. Salvini-Plawén, 1978 - syn of: Metamenia triglandulata (L. Salvini-Plawén, 1978) - (DONDERSIIDAE)
- triglandulata, Metamenia triglandulata (L. Salvini-Plawén, 1978) - (PRUVOTINIDAE)
- triglochis, Gulella triglochis (J.C. Melvill & J.H. Ponsonby, 1903) - (STREPTAXIDAE)
- trigoi, Coralliophila trigoi P. Mariottini, C. Smriglio & E. Rolán, 2005 - (MURICIDAE)
- trigoi, Rissoella trigoi E. Rolán & J.M. Hernández, 2004 - (RISSOELLIDAE)
- Trigoiocardia, syn of: Genus Ctenocardia H. Adams & A. Adams, 1857 (CARDIIDAE)
- Trigomyophoria, syn of: Genus Gruenewaldia Wöhrmann, 1889 † (MYOPHORIIDAE) (FOSSIL)
- trigona, Beichuania trigona H.X. Liu & Gu, 1988 † - (BEICHUANIIDAE) (FOSSIL)
- Trigona, syn of: Genus Trigonostoma H.M.D. De Blainville, 1825 (CANCELLARIIDAE)
- trigona, Cardinia trigona (A.V.M.D. D'Orbigny, 1950 †) - (CARDINIIDAE) (FOSSIL)
- trigona, Corbula trigona R.B. Hinds, 1843 - syn of: Potamocorbula adusta (L.A. Reeve, 1844) - (CORBULIDAE)
- trigona, Idonearca trigona Seguenza, 1882 † - (CUCULLAEIDAE) (FOSSIL)
- trigona, Cuspidaria trigona (R.B. Hinds, 1843) - (CUSPIDARIIDAE)
- trigona, Corbicula trigona G.P. Deshayes, 1854 - syn of: Corbicula striatella G.P. Deshayes, 1854 - (CYRENIDAE)
- trigona, Pythia trigona (F.H. Troschel, 1840) - (ELLOBIIDAE)
- trigona, Pilosabia trigona (J.F. Gmelin, 1791) - (HIPPONICIDAE)
- trigona, Erycina trigona Š. Brusina, 1865 - syn of: Abra tenuis (G. Montagu, 1803) - (LASAEIDAE)
- trigona, Mesodesma trigona G.P. Deshayes, 1832 - syn of: Atactodea striata (J.F. Gmelin, 1791) - (MESODESMATIDAE)
- trigona, Tellimya trigona K.H. Barnard, 1964 - (MONTACUTIDAE)
- trigona, Purpura trigona L.A. Reeve, 1846 - syn of: Indothais gradata (I.H. Jonas, 1846) - (MURICIDAE)
- trigona, Anodontites trigona (J.B. von Spix & J.A. Wagner, 1827) - (MYCETOPODIDAE)
- trigona, Myadora trigona L.A. Reeve, 1844 - (MYOCHAMIDAE)
- trigona, Brevinucula trigona A.E. Verrill, 1885 - syn of: Brevinucula verrilli (W.H. Dall, 1886) - (NUCULIDAE)
- trigona, Kamptoclymenia trigona Schindewolf, 1937 † - (PARAWOCKLUMERIIDAE) (FOSSIL)
- trigona, Panacca trigona T. Sasaki & T.A. Okutani, 2007 - (PARILIMYIDAE)
- trigona, Patella trigona J.F. Gmelin, 1791 - syn of: Pilosabia trigona (J.F. Gmelin, 1791) - (PATELLIDAE)
- trigona, Scrobicularia trigona F. Danilo & G.B. Sandri, 1856 - syn of: Scrobicularia cottardii (B.C.M. Payraudeau, 1826) - (SCROBICULARIIDAE)
- trigona, Leptomyaria trigona T. Habe, 1960 - (SEMELIDAE)
- trigona, Abra trigona Š. Brusina, 1865 - syn of: Abra tenuis (G. Montagu, 1803) - (SEMELIDAE)
- trigona, Tellina trigona A. Scacchi, 1835 - syn of: Diplodonta trigona (A. Scacchi, 1835) - (TELLINIDAE)
- trigona, Testacella trigona J. Gassies & P. Fischer, 1856 - syn of: Testacella maugei A.E.J. Férussac, 1819 - (TESTACELLIDAE)
- trigona, Thracia trigona A. Aradas, 1847 - syn of: Thracia convexa (Wood, 1815) - (THRACIIDAE)
- trigona, Diplodonta trigona (A. Scacchi, 1835) - (UNGULINIDAE)
- trigona, Fusconaia trigona I. Lea, 1831 - syn of: Fusconaia flava (C.S. Rafinesque, 1820) - (UNIONIDAE)
- trigona, Pelecyora trigona (L.A. Reeve, 1850) - (VENERIDAE)
- trigona, Cytherea trigona L.A. Reeve, 1864 - syn of: Meretrix attenuata R.W. Dunker, 1863 - (VENERIDAE)
- trigona, Tivela trigona A. Borchert, 1901 - syn of: Tivela dentaria (J.B.P.A. Lamarck, 1818) - (VENERIDAE)
- trigona, Dosinia trigona L.A. Reeve, 1850 - syn of: Pelecyora trigona (L.A. Reeve, 1850) - (VENERIDAE)
- trigona, Dosinia trigona P. Dautzenberg, 1923 - syn of: Costellipitar madecassinus (E. Fischer-Piette & D. Delmas, 1967) - (VENERIDAE)
- Trigona, syn of: Genus Tivela J.H.F. Link, 1807 (VENERIDAE)
- trigona amazonensis, Anodontites trigona amazonensis (I. Lea, 1860) - (MYCETOPODIDAE)
- trigona dalli, Anodontites trigona dalli F.C. Baker, 1913 - (MYCETOPODIDAE)
- trigona georginae, Anodontites trigona georginae J.E. Gray, 1834 - (MYCETOPODIDAE)
- trigona incarum, Anodontites trigona incarum (R.A. Philippi, 1869) - (MYCETOPODIDAE)
- trigona trautwinianus, Anodontites trigona trautwinianus I. Lea - syn of: Anodontites trigona (J.B. von Spix & J.A. Wagner, 1827) - (MYCETOPODIDAE)
- trigonaeformis, Pseudoheligmus trigonaeformis (Coquand 1862) † - (PTERIIDA (UNASSIGNED)) (FOSSIL)
- trigonale, Lophonychia trigonale (Cleland, 1911 †) - (AMBONYCHIIDAE) (FOSSIL)
- trigonale, Conocardium trigonale T.A. Conrad, 1840 † - syn of: Hoareicardia cuneus (T.A. Conrad, 1840 †) - (CONOCARDIIDAE) (FOSSIL)
- trigonale, Lepton trigonale R. Tate, 1879 - (LASAEIDAE)
- trigonale, Orthonychia trigonale (Barrois, 1889 †) - (ORTHONYCHIIDAE) (FOSSIL)
- trigonale, Platyceras trigonale Barrois, 1889 † - syn of: Orthonychia trigonale (Barrois, 1889 †) - (PLATYCERATIDAE) (FOSSIL)
- trigonalis, Trigonastarte trigonalis (J. de C. Sowerby 1824) † - (ASTARTIDAE) (FOSSIL)
- trigonalis, Paradoxipecten trigonalis S.Y. Feng & al., 1992 † - (AVICULOPECTINIDAE) (FOSSIL)
- trigonalis, Cardita trigonalis R. Tate, 1886 † - (CARDITIDAE) (FOSSIL)
- trigonalis, Pachydon trigonalis Nuttall, 1990 † - (CORBULIDAE) (FOSSIL)
- trigonalis, Corbula trigonalis Sowerby, 1840 † - (CORBULIDAE) (FOSSIL)
- trigonalis, Pseudoneaera trigonalis (R. Tate, 1897) - (CUSPIDARIIDAE)
- trigonalis, Notomya trigonalis Johnston, 1887 † - syn of: Megadesmus trigonalis (Johnston, 1887 †) - (EDMONDIIDAE) (FOSSIL)
- trigonalis, Wanwanella trigonalis T. Kobayashi, 1933 † - (EOPTERIIDAE) (FOSSIL)
- trigonalis, Potamomya trigonalis C.B. Adams, 1852 - syn of: Panamicorbula ventricosa (Adams & L.A. Reeve, 1850) - (ERODONIDAE)
- trigonalis, Euomphalus trigonalis G.A. Goldfuss, 1844 † - (EUOMPHALIDAE) (FOSSIL)
- trigonalis, Pycnodonte trigonalis † - (GRYPHAEIDAE) (FOSSIL)
- trigonalis, Hippocardia trigonalis B. Phillips, 1836 † - syn of: Hippocardia hibernica (J. de C. Sowerby, 1815 †) - (HIPPOCARDIIDAE) (FOSSIL)
- trigonalis, Sonneratia trigonalis Casey † - (HOPLITIDAE) (FOSSIL)
- trigonalis, Nesobornia trigonalis (M. Yokoyama, 1924) - (KELLIIDAE)
- trigonalis, Aligena trigonalis (P.P. Carpenter, 1857) - (LASAEIDAE)
- trigonalis, Lasaea trigonalis P.P. Carpenter, 1857 - syn of: Aligena trigonalis (P.P. Carpenter, 1857) - (LASAEIDAE)
- trigonalis, Orobitella trigonalis P.P. Carpenter, 1857 - syn of: Aligena trigonalis (P.P. Carpenter, 1857) - (LASAEIDAE)
- trigonalis, Isorobitella trigonalis P.P. Carpenter, 1857 - syn of: Aligena trigonalis (P.P. Carpenter, 1857) - (LASAEIDAE)
- trigonalis, Megadesmus trigonalis (Johnston, 1887 †) - (MEGADESMIDAE) (FOSSIL)
- trigonalis, Eurymya trigonalis Krasilova, 1979 † - (MODIOMORPHIDA (UNASSIGNED)) (FOSSIL)
- trigonalis, Chicoreus trigonalis Gábor, 1936 † - (MURICIDAE) (FOSSIL)
- trigonalis, Modiolus trigonalis Slodkewitsch, 1936 † - (MYTILIDAE) (FOSSIL)
- trigonalis, Gigantostrea trigonalis (T.A. Conrad, 1854 †) - (OSTREIDAE) (FOSSIL)
- trigonalis, Durga trigonalis Boehm, 1884 † - (PACHYRISMATIDAE) (FOSSIL)
- trigonalis, Palaeomutela trigonalis Amalitsky, 1892 † - (PALAEOMUTELIDAE) (FOSSIL)
- trigonalis, Pinna trigonalis (W.H. Pease, 1861) - (PINNIDAE)
- trigonalis, Cyrtopinna trigonalis W.H. Pease, 1861 - syn of: Pinna trigonalis (W.H. Pease, 1861) - (PINNIDAE)
- trigonalis, Proptychitoides trigonalis (Arthaber, 1911 †) - (PROPTYCHITIDAE) (FOSSIL)
- trigonalis, Schizodus trigonalis Sayre, 1930 † - (SCHIZODIDAE) (FOSSIL)
- trigonalis, Leptomya trigonalis (A. Adams & L.A. Reeve, 1850) - (SEMELIDAE)
- trigonalis, Thracia trigonalis A. Adams & L.A. Reeve, 1850 - syn of: Leptomya trigonalis (A. Adams & L.A. Reeve, 1850) - (THRACIIDAE)
- trigonalis, Mesochione trigonalis Tashiro, 1976 † - (VENERIDA (UNASSIGNED)) (FOSSIL)
- trigonalis, Rohea trigonalis (J. Marwick, 1927 †) - (VENERIDAE) (FOSSIL)
- trigonalis delicata, Wanwanella trigonalis delicata T. Kobayashi, 1933 † - (EOPTERIIDAE) (FOSSIL)
- trigonaperta, Personopsis trigonaperta A.G. Beu, 1998 - (PERSONIDAE)
- Trigonaphera, Genus Trigonaphera T. Iredale, 1936 (CANCELLARIIDAE)
- Trigonarca, syn of: Subgenus Cucullaea (Trigonoarca) Conrad, 1862 † (CUCULLAEIDAE) (FOSSIL)
- Trigonastarte, Genus Trigonastarte Bigot, 1885 † (ASTARTIDAE) (FOSSIL)
- trigonata, Astarte trigonata P. Nyst, 1881 - (ASTARTIDAE)
- trigonata, Crassatella trigonata J.B.P.A. Lamarck † - (CRASSATELLIDAE) (FOSSIL)
- trigonata, Avicula trigonata J.B.P.A. Lamarck, 1819 † - (PTERIIDAE) (FOSSIL)
- trigonata, Simplicicordia trigonata (M. Yokoyama, 1922 †) - (VERTICORDIIDAE) (FOSSIL)
- trigonata chaussy, Avicula trigonata chaussy J.B.C.P. de Raincourt, 1874 † - (PTERIIDAE) (FOSSIL)
- trigonatum, Vermiceras trigonatum Taylor 1998 † - (ARIETITIDAE) (FOSSIL)
- trigonatum, Hammatoceras trigonatum F.A. von Quenstedt, 1885 † - (HAMMATOCERATIDAE) (FOSSIL)
- trigonatus, Cyclostremiscus trigonatus (P.P. Carpenter, 1857) - (TORNIDAE)
- trigonella, Astarte trigonella P. Nyst, 1843 - (ASTARTIDAE)
- trigonella, Digitariopsis trigonella (Nust 1845) † - (ASTARTIDAE) (FOSSIL)
- trigonella, Luria trigonella W.J. Swainson, 1822 - syn of: Luria tessellata (W.J. Swainson, 1822) - (CYPRAEIDAE)
- trigonella, Glycymeris trigonella T.A. Conrad, 1833 † - (GLYCYMERIDIDAE) (FOSSIL)
- trigonella, Spisula trigonella (J.B.P.A. Lamarck, 1818) - (MACTRIDAE)
- trigonella, Mactra trigonella J.B.P.A. Lamarck, 1818 - syn of: Spisula trigonella (J.B.P.A. Lamarck, 1818) - (MACTRIDAE)
- Trigonella, syn of: Genus Mactra C. Linnaeus, 1767 (MACTRIDAE)
- trigonella, Tivela trigonella (J.B.P.A. Lamarck, 1818) - (VENERIDAE)
- trigonella minor, Glycymeris trigonella minor Lea, 1833 - (GLYCYMERIDIDAE)
- trigonellaris, Cardinia trigonellaris (von Schlotheim, 1820 †) - (CARDINIIDAE) (FOSSIL)
- Trigonellina, Genus Trigonellina Parnes, 1981 † (MYOPHORELLIDAE) (FOSSIL)
- Trigonellites, syn of: Genus Myophoria Bronn, 1834 † (MYOPHORIIDAE) (FOSSIL)
- trigonellus, Protoschizodus trigonellus Whidborne, 1892 † - (MOLLUSCA INCERTAE SEDIS) (FOSSIL)
- Trigonephrus, Genus Trigonephrus H.A. Pilsbry, 1905 (DORCASIIDAE)
- trigonia, Anisodonta alata trigonia (A.W.B. Powell, 1952) - (BASTEROTIIDAE)
- trigonia, Purpura trigonia L.A. Reeve, 1846 - syn of: Indothais gradata (I.H. Jonas, 1846) - (MURICIDAE)
- Trigonia, Genus Trigonia Bruguière, 1789 † (TRIGONIIDAE) (FOSSIL)
- trigonica, Nucula trigonica T.C. Lan & Y.C. Lee, 2001 - (NUCULIDAE)
- trigonicus, Conus trigonicus J.R. le B. Tomlin, 1937 † - (CONIDAE) (FOSSIL)
- TRIGONIIDA (UNASSIGNED) - Family (BIVALVIA-PALAEOHETERODONTA [Subclass]-TRIGONIIDA [Order]) (FOSSIL)
- TRIGONIIDAE Lamarck, 1819 - Family (BIVALVIA-PALAEOHETERODONTA [Subclass]-TRIGONIIDA [Order]-TRIGONIOIDEA [Superfamily])
- trigonimimus, Nodomytilus trigonimimus Kauffman & H.A. Leanza, 2004 † - (MYTILIDAE) (FOSSIL)
- Trigoniocardia, Genus Trigoniocardia W.H. Dall, 1900 (CARDIIDAE)
- trigonioides, Atalantia trigonioides Termier & Verriez, 1973 † - (MYOPHORIIDAE) (FOSSIL)
- Trigonioides, Genus Trigonioides Kobayashi & Suzuki, 1936 † (TRIGONIOIDIDAE) (FOSSIL)
- TRIGONIOIDIDAE Cox, 1952 † - Family (BIVALVIA-PALAEOHETERODONTA [Subclass]-TRIGONIIDA [Order]-TRIGONIOIDOIDEA [Superfamily]) (FOSSIL)
- trigonium, Paphies trigonium G.P. Deshayes, 1832 - syn of: Atactodea striata (J.F. Gmelin, 1791) - (MESODESMATIDAE)
- trigonium, Pinna trigonium R.W. Dunker, 1852 - syn of: Pinna bicolor J.F. Gmelin, 1791 - (PINNIDAE)
- Trigonoarca, Subgenus Cucullaea (Trigonoarca) Conrad, 1862 † (CUCULLAEIDAE) (FOSSIL)
- Trigonocallista, Genus Trigonocallista Rennie, 1930 † (VENERIDAE) (FOSSIL)
- Trigonocardia, syn of: Genus Trigoniocardia W.H. Dall, 1900 (CARDIIDAE)
- Trigonoceras, Genus Trigonoceras McCoy, 1844 † (TRIGONOCERATIDAE) (FOSSIL)
- TRIGONOCERATIDAE Hyatt, 1884 † - Family (CEPHALOPODA-NAUTILOIDEA [Subclass]-NAUTILIDA [Order]-TRIGONOCERATOIDEA [Superfamily]) (FOSSIL)
- trigonochilus, Pseudonapaeus trigonochilus (C.M.F. Ancey, 1886) - (ENIDAE)
- TRIGONOCHLAMYDIDAE Hesse, 1882 - Family (GASTROPODA-HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-PARMACELLOIDEA [Superfamily])
- Trigonochlamys, Genus Trigonochlamys O. Böttger, 1881 (TRIGONOCHLAMYDIDAE)
- Trigonoclymenia, Genus Trigonoclymenia Schindewolf, 1934 (PLATYCLYMENIIDAE) (FOSSIL)
- Trigonocoelia, syn of: Genus Limopsis A. Sasso, 1827 (LIMOPSIDAE)
- Trigonoconcha, Genus Trigonoconcha Sanchez, 1999 † (PRAENUCULIDAE) (FOSSIL)
- Trigonocrassatella, Genus Trigonocrassatella Freneix, 1972 † (CARDIIDA (UNASSIGNED)) (FOSSIL)
- Trigonodesma, Genus Trigonodesma S.V. Wood, 1864 † (NOETIIDAE) (FOSSIL)
- TRIGONODIDAE Modell, 1942 † - Family (BIVALVIA-PALAEOHETERODONTA [Subclass]-TRIGONIIDA [Order]-TRIGONODOIDEA [Superfamily]) (FOSSIL)
- Trigonodon, Subgenus Pseudodon (Trigonodon) Conrad, 1865 † (UNIONIDAE) (FOSSIL)
- Trigonodon, syn of: Genus Pseudodon A. Gould, 1844 (UNIONIDAE)
- Trigonodus, Genus Trigonodus Jelen, 1989 † (PACHYCARDIIDAE) (FOSSIL)
- trigonoelliptica, Mysella trigonoelliptica J.D. Stilwell & Zinsmeister, 1992 † - (MONTACUTIDAE) (FOSSIL)
- Trigonogastrioceras, Genus Trigonogastrioceras Librovich, 1957 † (GONIATITIDA (UNASSIGNED)) (FOSSIL)
- Trigonogastrites, Genus Trigonogastrites Zhao & al., 1978 † (PSEUDOTIROLITIDAE) (FOSSIL)
- Trigonoglyptarca, Genus Trigonoglyptarca Fang & Cope 2004 † (GLYPTARCIDAE) (FOSSIL)
- trigonoides, Didacna trigonoides (P.S. Pallas, 1771) - (CARDIIDAE)
- trigonoides, Pisidium trigonoides (W. Dybowski, 1902) - (SPHAERIIDAE)
- trigonoides, Henslowiana trigonoides W. Dybowski, 1902 - syn of: Pisidium trigonoides (W. Dybowski, 1902) - (SPHAERIIDAE)
- trigonoides, Tellina trigonoides A.W. Grabau & S.G. King, 1928 - syn of: Donax kiusiuensis (H.A. Pilsbry, 1901) - (TELLINIDAE)
- trigonoovata, Callista trigonoovata O.A. Scarlato in Volova & O.A. Scarlato, 1980 - syn of: Ezocallista brevisiphonata (P.P. Carpenter, 1864) - (VENERIDAE)
- Trigonopis, Genus Trigonopis Fischer, 1887 † (ASTARTIDAE) (FOSSIL)
- trigonopsis, Anomia trigonopsis F.W. Hutton, 1877 - (ANOMIIDAE)
- trigonopsis, Cosa trigonopsis (F.W. Hutton, 1885 †) - (PHILOBRYIDAE) (FOSSIL)
- trigonopsis descripta, Anomia trigonopsis descripta T. Iredale, 1936 - (ANOMIIDAE)
- Trigonopupa, Genus Trigonopupa Nordsieck, 2014 † (VERTIGINIDAE) (FOSSIL)
- Trigonopythia, Subgenus Pythia (Trigonopythia) W. Kobelt, 1898 (ELLOBIIDAE)
- Trigonosphaerium, syn of: Genus Sphaerium J.A. Scopoli, 1777 (SPHAERIIDAE)
- trigonostoma, Angaria trigonostoma J.B.P.A. Lamarck, 1822 - syn of: Trigonostoma scalare (J.F. Gmelin, 1791) - (ANGARIIDAE)
- trigonostoma, Tremanotus trigonostoma J.W. Hall & R.P. Whitfield, 1875 † - (BUCANIIDAE) (FOSSIL)
- Trigonostoma, Genus Trigonostoma H.M.D. De Blainville, 1825 (CANCELLARIIDAE)
- trigonostoma, Trigonostoma trigonostoma J.B.P.A. Lamarck, 1822 - syn of: Trigonostoma scalare (J.F. Gmelin, 1791) - (CANCELLARIIDAE)
- trigonostoma, Incania trigonostoma (O. Böttger, 1880) - (CLAUSILIIDAE)
- Trigonostoma, syn of: Genus Erjavecia Š. Brusina, 1870 (CLAUSILIIDAE)
- trigonostoma, Vestiella roschitzi trigonostoma (P.S. Pavlovic, 1912) - (CLAUSILIIDAE)
- trigonostoma, Azeca trigonostoma P. Fagot, 1870 - syn of: Azeca goodalli (A.E.J. Férussac, 1821) - (COCHLICOPIDAE)
- Trigonostoma, syn of: Genus Helicodonta A.E.J. Férussac in A. Risso, 1826 (HELICODONTIDAE)
- trigonostoma, Ebala trigonostoma (L. de Folin, 1872) - (MURCHISONELLIDAE)
- trigonostoma, Solaropsis trigonostoma F. Haas, 1934 - (PLEURODONTIDAE)
- trigonostoma, Eulimella trigonostoma L. de Folin, 1872 - syn of: Ebala gradata (T.A. de M. Monterosato, 1878) - (PYRAMIDELLIDAE)
- trigonostoma, Ennea trigonostoma (E.C. Von Martens, 1876) - (STREPTAXIDAE)
- trigonostoma, Leptinaria trigonostoma L. Pfeiffer, 1845 - syn of: Leptarionta trigonostoma (L. Pfeiffer, 1845) - (SUBULINIDAE)
- trigonostoma, Tornus trigonostoma (B. de Basterot, 1825 †) - (TORNIDAE) (FOSSIL)
- trigonostoma, Trigonopupa trigonostoma C.L.F. von Sandberger † - (VERTIGINIDAE) (FOSSIL)
- trigonostoma, Leptarionta trigonostoma (L. Pfeiffer, 1845) - (XANTHONYCHIDAE)
- trigonostoma elevatoconica, Leptarionta trigonostoma elevatoconica (P.H. Fischer & J.C.H. Crosse, 1872) - (XANTHONYCHIDAE)
- trigonostoma freytagiana, Leptarionta trigonostoma freytagiana (E.C. Von Martens, 1892) - (XANTHONYCHIDAE)
- trigonostoma intermedia, Leptarionta trigonostoma intermedia (P.H. Fischer & J.C.H. Crosse, 1872) - (XANTHONYCHIDAE)
- trigonostoma salleana, Leptarionta trigonostoma salleana (L. Pfeiffer, 1849) - (XANTHONYCHIDAE)
- trigonostoma stolliana, Leptinaria trigonostoma stolliana E.C. Von Martens, 1892 - syn of: Leptarionta trigonostoma stolliana (E.C. Von Martens, 1892) - (SUBULINIDAE)
- trigonostoma stolliana, Leptarionta trigonostoma stolliana (E.C. Von Martens, 1892) - (XANTHONYCHIDAE)
- trigonostomum, Solarium trigonostomum A.V.M.D. D'Orbigny, 1825 † - syn of: Tornus trigonostoma (B. de Basterot, 1825 †) - (ARCHITECTONICIDAE) (FOSSIL)
- trigonostomum, Cerithium trigonostomum J.C. Melvill, 1910 - syn of: Varicopeza pauxilla (A. Adams, 1855) - (CERITHIIDAE)
- trigonostomum, Etrema trigonostomum (R.P.J. Hervier, 1896) - (CLATHURELLIDAE)
- trigonostomum, Glyphostoma trigonostomum R.P.J. Hervier, 1896 - syn of: Etrema trigonostomum (R.P.J. Hervier, 1896) - (CLATHURELLIDAE)
- trigonostomum albescens, Etrema trigonostomum albescens (R.P.J. Hervier, 1896) - (CLATHURELLIDAE)
- trigonostomum turriculata, Etrema trigonostomum turriculata (R.P.J. Hervier, 1896) - (CLATHURELLIDAE)
- trigonostomus, Drymaeus trigonostomus (I.H. Jonas, 1844) - (BULIMULIDAE)
- trigonostomus, Dryotrochus trigonostomus L. Pfeiffer, 1845 - syn of: Leptarionta trigonostoma (L. Pfeiffer, 1845) - (XANTHONYCHIDAE)
- trigonostomus correctus, Drymaeus trigonostomus correctus L. Pfeiffer, 1852 - (BULIMULIDAE)
- Trigonothracia, Genus Trigonothracia A. Yamamoto & T. Habe, 1959 (THRACIIDAE)
- Trigonotyphis, syn of: Genus Pterotyphis F.P. Jousseaume, 1881 (MURICIDAE)
- Trigonucula, Genus Trigonucula Ichikawa, 1949 † (NUCULIDAE) (FOSSIL)
- trigonula, Lentidium trigonula T.A. de M. Monterosato, 1884 - syn of: Lentidium mediterraneum (A. da Costa, 1830) - (CORBULIDAE)
- trigonula, Etheria trigonula J.B.P.A. Lamarck, 1807 - syn of: Etheria elliptica J.B.P.A. Lamarck, 1807 - (ETHERIIDAE)
- trigonula, Miltha trigonula (G.P. Deshayes, 1830 †) - (LUCINIDAE) (FOSSIL)
- trigonula, Nucula trigonula Wood, 1840 † - (NUCULIDAE) (FOSSIL)
- trigonula, Diplodonta trigonula H.G. Bronn, 1831 † - (UNGULINIDAE) (FOSSIL)
- trigonula, Meroena trigonula (G.P. Deshayes, 1825 †) - (VENERIDAE) (FOSSIL)
- trigonularis, Murex trigonularis J.B.P.A. Lamarck, 1822 - syn of: Timbellus bednalli (J.W. Brazier, 1878) - (MURICIDAE)
- trigonularis, Myadora trigonularis J.C. Jay, 1850 - syn of: Myadora trigona L.A. Reeve, 1844 - (MYOCHAMIDAE)
- trigonularis, Cumingia trigonularis G.B. I Sowerby, 1833 - syn of: Cumingia lamellosa G.B. I Sowerby, 1833 - (SEMELIDAE)
- Trigonulina, Genus Trigonulina A.V.M.D. D'Orbigny, 1846 (VERTICORDIIDAE)
- trigonulum, Lentidium mediterraneum trigonulum T.A. de M. Monterosato, 1884 - (CORBULIDAE)
- trigonulus, Conus trigonulus J.P.S. Grateloup, 1835 † - (CONIDAE) (FOSSIL)
- trigonulus, Donax trigonulus G.P. Deshayes, 1857 † - (DONACIDAE) (FOSSIL)
- trigonulus, Murex trigonulus J.B.P.A. Lamarck, 1816 - syn of: Naquetia triqueter (I. von Born, 1778) - (MURICIDAE)
- trigonulus, Theodoxus grateloupianus trigonulus Kókay, 2006 † - (NERITIDAE) (FOSSIL)
- trigonum, Lentidium trigonum (J.B.P.A. Lamarck, 1805 †) - (CORBULIDAE) (FOSSIL)
- trigonum, Lepton trigonum L. de Folin, 1877 - syn of: Lepton subtrigonum J.G. Jeffreys in L. de Folin & J.P.L. Périer, 1873 - (LASAEIDAE)
- trigonum, Rangia trigonum S.A.A. Petit De La Saussaye, 1853 - syn of: Rangia mendica (A.A. Gould, 1851) - (MACTRIDAE)
- trigonum, Cymatium trigonum J.F. Gmelin, 1791 - syn of: Monoplex trigonus (J.F. Gmelin, 1791) - (RANELLIDAE)
- trigonum, Pisidium trigonum É.A.A. Locard, 1893 - syn of: Pisidium moitessierianum A. Paladilhe, 1866 - (SPHAERIIDAE)
- trigonum, Dilatilabrum trigonum (J.P.S. Grateloup, 1833 †) - (STROMBIDAE) (FOSSIL)
- trigonura, Diplopelycia trigonura O.A.L. Mörch † - (ARANUCIDAE) (FOSSIL)
- trigonura, Abralia trigonura S.S. Berry, 1913 - (ENOPLOTEUTHIDAE)
- trigonus, Coleolus trigonus A.V. Sysoev, 1962 † - (COLEOLIDAE) (FOSSIL)
- trigonus, Plicaustraconus trigonus (L.A. Reeve, 1848) - (CONIDAE)
- trigonus, Murex trigonus M. Rouault, 1849 † - (MURICIDAE) (FOSSIL)
- trigonus, Murex trigonus J.F. Gmelin, 1791 - syn of: Monoplex trigonus (J.F. Gmelin, 1791) - (MURICIDAE)
- trigonus, Murex trigonus J.B.P.A. Lamarck, 1822 - syn of: Naquetia cumingii (A. Adams, 1853) - (MURICIDAE)
- trigonus, Mytilus galloprovincialis trigonus É.A.A. Locard, 1889 - (MYTILIDAE)
- trigonus, Bulinus trigonus E.C. Von Martens, 1892 - (PLANORBIDAE)
- trigonus, Palaeocapulus trigonus (G.A. Goldfuss, 1844 †) - (PLATYCERATIDAE) (FOSSIL)
- trigonus, Monoplex trigonus (J.F. Gmelin, 1791) - (RANELLIDAE)
- trigonus, Anodon trigonus J.B. von Spix & J.A. Wagner, 1827 - syn of: Anodontites trigona (J.B. von Spix & J.A. Wagner, 1827) - (UNIONIDAE)
- trigonus adami, Conus trigonus adami E. Wils, 1988 - syn of: Plicaustraconus adami E. Wils, 1988 - (CONIDAE)
- trigris, Semipallium trigris (J.B.P.A. Lamarck, 1819) - (PECTINIDAE)
- Trigyra, Genus Trigyra Raymond, 1908 † (SINUITIDAE) (FOSSIL)
- Triimitoceras, Genus Triimitoceras Korn & al., 2003 † (PRIONOCERATIDAE) (FOSSIL)
- trikamnyaensis, Flemingites trikamnyaensis Smyshlyaeva & Zakharov, 2013 † - (FLEMINGITIDAE) (FOSSIL)
- trikkalinoi, Hellenites trikkalinoi Renz & Renz, 1948 † - syn of: Hellenites praematurus (Arthaber, 1911 †) - (COLUMBITIDAE) (FOSSIL)
- trikranus, Kerberites trikranus Buckman † - (AMMONOIDEA (UNASSIGNED)) (FOSSIL)
- Trilacinoceras, Genus Trilacinoceras Sweet, 1958 † (LITUITIDAE) (FOSSIL)
- trilamellata, Fectola trilamellata F.M. Climo, 1978 - (CHAROPIDAE)
- trilamellata, Cochlodinastra comensis trilamellata (A. Schmidt, 1868) - (CLAUSILIIDAE)
- trilamellata, Badiofaux trilamellata (L. Pfeiffer, 1864) - (UROCOPTIDAE)
- trilamellata tomasensis, Badiofaux trilamellata tomasensis C. de la Torre & P. Bartsch, 1972 - (UROCOPTIDAE)
- Trilamellaxis, Genus Trilamellaxis M.L. Jaume & C. de la Torre, 1972 (UROCOPTIDAE)
- Trilatella, syn of: Subgenus Dermomurex (Trialatella) S.S. Berry, 1964 (MURICIDAE)
- trilatera, Tellina trilatera J.F. Gmelin, 1791 - (TELLINIDAE)
- trilaterum, Didacna trilaterum J.F. Gmelin, 1791 - syn of: Didacna trigonoides (P.S. Pallas, 1771) - (CARDIIDAE)
- Trilemma, Genus Trilemma Blagovetshenskiy & Shumilkin, 2006 † (APORRHAIDAE) (FOSSIL)
- trilica, Siphonalia trilica Rivera, 1957 † - (BUCCINIDAE) (FOSSIL)
- trilinearis, Eopecten trilinearis (Seeley) † - (PECTINIDAE) (FOSSIL)
- trilineata, Achatinella trilineata J.T. Gulick, 1856 - syn of: Achatinella fulgens W. Newcomb, 1853 - (ACHATINELLIDAE)
- trilineata, Aclis trilineata R.B. Watson, 1897 - (ACLIDIDAE)
- trilineata, Cockriggia trilineata Lamont, 1978 † - (ARCHAEOGASTROPODA (UNASSIGNED)) (FOSSIL)
- trilineata, Anadara trilineata T.A. Conrad, 1856 † - (ARCIDAE) (FOSSIL)
- trilineata, Bothriembryon trilineata (J.R.C. Quoy & J.P. Gaimard, 1832) - (BOTHRIEMBRYONTIDAE)
- trilineata, Seila trilineata (R.A. Philippi, 1836) - (CERITHIOPSIDAE)
- trilineata, Mexichromis trilineata (A. Adams & L.A. Reeve, 1850) - (CHROMODORIDIDAE)
- trilineata, Chromodoris trilineata H.F.A. von Ihering, 1880 - syn of: Felimida krohni (J.B. Vérany, 1846) - (CHROMODORIDIDAE)
- trilineata, Pectenodoris trilineata A. Adams & L.A. Reeve, 1850 - syn of: Mexichromis trilineata (A. Adams & L.A. Reeve, 1850) - (CHROMODORIDIDAE)
- trilineata, Parviterebra trilineata (A. Adams & G.F. Angas, 1863) - (COLUMBELLIDAE)
- trilineata, Euryta trilineata A. Adams & G.F. Angas, 1863 - syn of: Parviterebra trilineata (A. Adams & G.F. Angas, 1863) - (COLUMBELLIDAE)
- trilineata, Mucronalia trilineata A. Warén, 1980 - (EULIMIDAE)
- trilineata, Niso trilineata O.A.L. Mörch, 1872 - (EULIMIDAE)
- trilineata, Flabellina trilineata (O'Donoghue, 1921) - (FLABELLINIDAE)
- trilineata, Platyzona trilineata (J.W. Hall, 1856 †) - (GONIASMATIDAE) (FOSSIL)
- trilineata, Goniodoris trilineata A. Adams & L.A. Reeve, 1850 - syn of: Mexichromis trilineata (A. Adams & L.A. Reeve, 1850) - (GONIODORIDIDAE)
- trilineata, Helix trilineata J.R.C. Quoy & J.P. Gaimard, 1832 - syn of: Bothriembryon kingii (J.E. Gray, 1825) - (HELICIDAE)
- trilineata, Hero trilineata G.O. Sars, 1850 - syn of: Hero formosa (S.L. Lovén, 1844) - (HEROIDAE)
- trilineata, Eunema trilineata J.W. Hall, 1868 † - (LOPHOSPIRIDAE) (FOSSIL)
- trilineata, Paupospira trilineata (Foerste, 1923 †) - (LOPHOSPIRIDAE) (FOSSIL)
- trilineata, Lophospira trilineata Secrist & Evitt, 1943 † - syn of: Lophospira perangulata (J.W. Hall, 1847 †) - (LOPHOSPIRIDAE) (FOSSIL)
- trilineata, Loxoplocus trilineata Pitcher, 1939 † - syn of: Loxoplocus sedgwicki J. Donald, 1906 † - (LOPHOSPIRIDAE) (FOSSIL)
- trilineata, Tenaturris trilineata (C.B. Adams, 1845) - (MANGELIIDAE)
- trilineata, Cryoturris trilineata (C.B. Adams, 1845) - (MANGELIIDAE)
- trilineata, Murchisonia trilineata (F. Sandberger & G. Sandberger, 1854 †) - (MURCHISONIIDAE) (FOSSIL)
- trilineata, Pandora trilineata T. Say, 1822 - (PANDORIDAE)
- trilineata, Phyllidia trilineata G.L.C.F.D. Cuvier, 1804 - syn of: Phyllidia varicosa J.B.P.A. Lamarck, 1801 - (PHYLLIDIIDAE)
- trilineata, Phyllidiopsis trilineata H.M.D. de Blainville, 1825 - syn of: Phyllidiella striata (L.S.R. Bergh, 1889) - (PHYLLIDIIDAE)
- trilineata, Phyllidia trilineata J.R.C. Quoy & J.P. Gaimard, 1824 - syn of: Phyllidia varicosa J.B.P.A. Lamarck, 1801 - (PHYLLIDIIDAE)
- trilineata, Anculosa trilineata T. Say, 1829 - (PLEUROCERIDAE)
- trilineata, Pleurotomaria trilineata F. Sandberger & G. Sandberger, 1854 † - syn of: Murchisonia trilineata (F. Sandberger & G. Sandberger, 1854 †) - (PLEUROTOMARIIDAE) (FOSSIL)
- trilineata, Pleurotomaria trilineata J.W. Hall, 1856 † - syn of: Platyzona trilineata (J.W. Hall, 1856 †) - (PLEUROTOMARIIDAE) (FOSSIL)
- trilineata, Chemnitzia trilineata (C.B. Adams, 1855) - (PYRAMIDELLIDAE)
- trilineata, Ranularia trilineata (L.A. Reeve, 1844) - (RANELLIDAE)
- trilineata, Impages trilineata L. Bozzetti, 2008 - (TEREBRIDAE)
- trilineata, Pleurotoma trilineata C.B. Adams, 1845 - syn of: Cryoturris trilineata (C.B. Adams, 1845) - (TURRIDAE)
- trilineata, Turritella trilineata Smith, 1817 † - (TURRITELLIDAE) (FOSSIL)
- trilineata, Vermicularia trilineata R.J.L. Guppy, 1864 † - (TURRITELLIDAE) (FOSSIL)
- trilineata calcarea, Anadara trilineata calcarea Grant & H.R. Gale, 1931 † - (ARCIDAE) (FOSSIL)
- trilineata maculata, Tenaturris trilineata maculata G.W. Nowell-Usticke, 1969 - (MANGELIIDAE)
- trilineatum, Solarium trilineatum (T.A. Conrad, 1841 †) - (ARCHITECTONICIDAE) (FOSSIL)
- trilineatum, Cerithium trilineatum R.A. Philippi, 1836 - syn of: Seila trilineata (R.A. Philippi, 1836) - (CERITHIIDAE)
- trilineatum, Pusia trilineatum M. Herrmann & G. Stossier, 2011 - (COSTELLARIIDAE)
- trilineatum, Putealiceras trilineatum L. Waagen, 1875 † - (OPPELIIDAE) (FOSSIL)
- trilineatus, Melampus trilineatus C.B. Adams, 1852 - (ELLOBIIDAE)
- trilineatus, Murex trilineatus L.A. Reeve, 1830 - syn of: Siratus ciboney trilineatus (L.A. Reeve, 1830) - (MURICIDAE)
- trilineatus, Siratus ciboney trilineatus (L.A. Reeve, 1830) - (MURICIDAE)
- trilineriana, Barbatia trilineriana H.B. Preston - (ARCIDAE)
- trilira, Turritella trilira T.A. Conrad, 1860 † - (TURRITELLIDAE) (FOSSIL)
- trilirata, Architectonica trilirata (T.A. Conrad, 1848 †) - (ARCHITECTONICIDAE) (FOSSIL)
- trilirata, Japonia trilirata (L. Pfeiffer, 1852) - (CYCLOPHORIDAE)
- trilirata, Diala trilirata J.C. Melvill, 1906 - syn of: Diala semistriata (R.A. Philippi, 1849) - (DIALIDAE)
- trilirata, Teretianax trilirata L. de Folin, 1873 - syn of: Pyramidelloides triliratus (L. de Folin, 1873) - (EULIMIDAE)
- trilirata, Rissoina trilirata P.J. Fischer, 1927 † - (RISSOINIDAE) (FOSSIL)
- trilirata, Viriola trilirata G.P. Deshayes, 1863 - syn of: Viriola albomarmorata (R.P.J. Hervier, 1898) - (TRIPHORIDAE)
- trilirata, Incatella trilirata (R.A. Philippi, 1887 †) - (TURRITELLIDAE) (FOSSIL)
- trilirata, Sublacuna trilirata K.H.J. Thiele, 1912 - syn of: Trilirata macmurdensis (C. Hedley, 1911) - (VANIKORIDAE)
- Trilirata, Genus Trilirata A. Warén & S. Hain, 1996 (ZEROTULIDAE)
- trilirata albomarmorata, Triphora trilirata albomarmorata R.P.J. Hervier, 1898 - syn of: Viriola albomarmorata (R.P.J. Hervier, 1898) - (TRIPHORIDAE)
- trilirata quadrifilosa, Japonia trilirata quadrifilosa (W.H. Benson, 1852) - (CYCLOPHORIDAE)
- triliratum, Phragmostoma triliratum J.W. Hall, 1879 † - syn of: Phragmosphaera triliratus (J.W. Hall, 1879 †) - (PTEROTHECIDAE) (FOSSIL)
- triliratus, Drepanocheilus triliratus S. Kiel & K. Bandel, 2002 † - (APORRHAIDAE) (FOSSIL)
- triliratus, Drepanocheilus triliratus L.W. Stephenson, 1941 † - (APORRHAIDAE) (FOSSIL)
- triliratus, Pyramidelloides triliratus (L. de Folin, 1873) - (EULIMIDAE)
- triliratus, Phragmosphaera triliratus (J.W. Hall, 1879 †) - (PTEROTHECIDAE) (FOSSIL)
- triliris, Euomphalus triliris Easton, 1943 † - (EUOMPHALIDAE) (FOSSIL)
- trilirus, Tympanotonos trilirus D.T. Dockery, 1993 † - (POTAMIDIDAE) (FOSSIL)
- trilix, Aforia trilix (R.B. Watson, 1881) - (COCHLESPIRIDAE)
- trilix, Ruedemannia trilix (J.W. Hall, 1862 †) - (LOPHOSPIRIDAE) (FOSSIL)
- trilix, Skenea trilix K.J. Bush, 1885 - syn of: Cyclostremiscus trilix (K.J. Bush, 1885) - (SKENEIDAE)
- trilix, Cyclostremiscus trilix (K.J. Bush, 1885) - (TORNIDAE)
- trilix, Colpospira trilix B.C. Cotton & Woods, 1935 † - (TURRITELLIDAE) (FOSSIL)
- trilloi, Jujubinus trilloi C. Smriglio, A. Di Giulio & P. Mariottini, 2014 - (TROCHIDAE)
- Triloba, Genus Triloba W. von Vest, 1867 (CLAUSILIIDAE)
- triloba, Cochlodina triloba (O. Böttger, 1870) - (CLAUSILIIDAE)
- triloba, Cavilinga triloba D.T. Dockery, 1982 † - (LUCINIDAE) (FOSSIL)
- trilobata, Antillocaprina trilobata Garcia-Barrera & al., 1998 † - (ANTILLOCAPRINIDAE) (FOSSIL)
- trilobata, Bucanella trilobata de Sowerby & Murchison, 1839 † - syn of: Tritonophon trilobatus (J. de C. Sowerby & Murchison, 1839 †) - (BUCANELLIDAE) (FOSSIL)
- trilobata, Ceratosoma trilobata J.E. Gray, 1827 - syn of: Ceratosoma trilobatum (J.E. Gray, 1827) - (CHROMODORIDIDAE)
- trilobata, Doris trilobata J.E. Gray, 1827 - syn of: Ceratosoma trilobatum (J.E. Gray, 1827) - (DORIDIDAE)
- trilobata, Laginiopsis trilobata A. Pruvot-Fol, 1922 - (LAGINIOPSIDAE)
- trilobata, Monopleura trilobata (A.V.M.D. D'Orbigny, 1841 †) - (MONOPLEURIDAE) (FOSSIL)
- trilobata, Elysia trilobata J. Heller & T.E. Thompson, 1983 - (PLAKOBRANCHIDAE)
- trilobatum, Ceratosoma trilobatum (J.E. Gray, 1827) - (CHROMODORIDIDAE)
- trilobatum, Umbeloceras trilobatum (Flower, 1952 †) - (MANDALOCERATIDAE) (FOSSIL)
- trilobatum, Platyceras trilobatum J.W. Hall, 1859 † - (PLATYCERATIDAE) (FOSSIL)
- trilobatus, Bucaniella trilobatus de Sowerby & Murchison, 1839 † - syn of: Tritonophon trilobatus (J. de C. Sowerby & Murchison, 1839 †) - (BELLEROPHONTIDAE) (FOSSIL)
- trilobatus, Bellerophon trilobatus J. de C. Sowerby & Murchison, 1839 † - syn of: Tritonophon trilobatus (J. de C. Sowerby & Murchison, 1839 †) - (BELLEROPHONTIDAE) (FOSSIL)
- trilobatus, Bellerophon trilobatus T.A. Conrad, 1839 † - syn of: Plectonotoides trilobatus (T.A. Conrad, 1839 †) - (BELLEROPHONTIDAE) (FOSSIL)
- trilobatus, Flemingites trilobatus L. Waagen, 1895 † - syn of: Flemingites flemingianus (de Koninck, 1863 †) - (FLEMINGITIDAE) (FOSSIL)
- trilobatus, Plectonotoides trilobatus (T.A. Conrad, 1839 †) - (PLECTONOTIDAE) (FOSSIL)
- trilobatus, Tritonophon trilobatus (J. de C. Sowerby & Murchison, 1839 †) - (PLECTONOTIDAE) (FOSSIL)
- trilobatus, Proptychites trilobatus (L. Waagen, 1895 †) - (PROPTYCHITIDAE) (FOSSIL)
- Trilobella, syn of: Genus Triloba W. von Vest, 1867 (CLAUSILIIDAE)
- trilobita, Bucanella trilobita T.A. Conrad, 1839 † - syn of: Plectonotoides trilobatus (T.A. Conrad, 1839 †) - (BUCANELLIDAE) (FOSSIL)
- trilobita, Eopteria trilobita Kobayashi, 1934 † - (EOPTERIIDAE) (FOSSIL)
- Trilobiticeras, Subgenus Docidoceras (Trilobiticeras) Whitehouse, 1924 † (OTOITIDAE) (FOSSIL)
- trilobitoides, Trilobiticeras trilobitoides S.S. Buckman † - (OTOITIDAE) (FOSSIL)
- Trilobopsis, Genus Trilobopsis H.A. Pilsbry, 1939 (POLYGYRIDAE)
- trilophodes, Chengjiangoconus trilophodes He & Yang, 1982 † - syn of: Ocruranus subpentaedrus H.X. Liu, 1979 † - (HALKIERIIDAE) (FOSSIL)
- trilophosensis, Theodoxus trilophosensis Rust, 1997 † - (NERITIDAE) (FOSSIL)
- trimaculata, Aldisa trimaculata T.M. Gosliner in S.V. Millen & T.M. Gosliner, 1985 - (CADLINIDAE)
- trimaculata, Asperdaphne trimaculata B.C. Cotton, 1947 - (RAPHITOMIDAE)
- trimaculata, Lioconcha trimaculata (J.B.P.A. Lamarck, 1818) - (VENERIDAE)
- Trimalaxis, Genus Trimalaxis Garvie, 1996 † (OPISTHOBRANCHIA (UNASSIGNED)) (FOSSIL)
- Trimanticoceras, Genus Trimanticoceras House , 1977 † (GEPHUROCERATIDAE) (FOSSIL)
- trimarginata, Proturritella trimarginata (K.E.I. von Eichwald, 1840 †) - (LOPHOSPIRIDAE) (FOSSIL)
- trimarginata, Turbo trimarginata d'Eichwald, 1856 † - (TURBINIDAE) (FOSSIL)
- trimarginatus, Goniobranchus trimarginatus (R. Winckworth, 1946) - (CHROMODORIDIDAE)
- trimarginatus, Chromodoris trimarginatus (R. Winckworth, 1946) - syn of: Goniobranchus trimarginatus (R. Winckworth, 1946) - (CHROMODORIDIDAE)
- trimarginatus, Trimarginites trimarginatus (Oppel, 1863 †) - (OPPELIIDAE) (FOSSIL)
- trimarginatus, Turbo trimarginatus K.E.I. von Eichwald, 1840 † - syn of: Proturritella trimarginata (K.E.I. von Eichwald, 1840 †) - (TURBINIDAE) (FOSSIL)
- Trimarginia, Genus Trimarginia Arkell, 1952 † (OPPELIIDAE) (FOSSIL)
- Trimarginites, Subgenus Oppelia (Trimarginites) Rollier, 1909 † (OPPELIIDAE) (FOSSIL)
- trimariana, Crassispira trimariana H.A. Pilsbry & H.N. Lowe, 1932 - (PSEUDOMELATOMIDAE)
- trimariana, Odostomia trimariana H.A. Pilsbry & H.N. Lowe, 1932 - (PYRAMIDELLIDAE)
- trimarianus, Mesembrinus trimarianus (E.C. Von Martens, 1893) - (BULIMULIDAE)
- trimatris, Praticolella trimatris L.R. Hubricht, 1983 - (POLYGYRIDAE)
- trimellata, Gongylostoma trimellata (L. Pfeiffer, 1864) - (UROCOPTIDAE)
- trimeni, Euplecta trimeni (F.P. Jousseaume, 1894) - (ARIOPHANTIDAE)
- trimerelloides, Pterotheca trimerelloides P.S. Clarkson & al., 1995 † - (PTEROTHECIDAE) (FOSSIL)
- trimeresurus, Thylacodes trimeresurus (T. Shikama & M. Horikoshi, 1963) - (VERMETIDAE)
- trimeris, Lirophora trimeris Gardner, 1947 † - (VENERIDAE) (FOSSIL)
- Trimeroceras, Genus Trimeroceras Hyatt, 1884 † (TRIMEROCERATIDAE) (FOSSIL)
- TRIMEROCERATIDAE Hyatt & Zittel, 1900 † - Family (CEPHALOPODA-NAUTILOIDEA [Subclass]-ONCOCERIDA [Order]) (FOSSIL)
- trimetra, Bucanella trimetra Öpik, 1953 † - syn of: Tritonophon trimetra (Öpik, 1953 †) - (BUCANELLIDAE) (FOSSIL)
- trimetra, Tritonophon trimetra (Öpik, 1953 †) - (PLECTONOTIDAE) (FOSSIL)
- trimeuselensis, Striatoconulus trimeuselensis A. Nützel & J. Gründel, 2015 † - (ATAPHRIDAE) (FOSSIL)
- trimitrodita, Drillia trimitrodita J. Gardner, 1937 † - (DRILLIIDAE) (FOSSIL)
- trimonile, Metacerithium trimonile (J.L.H. Michelin, 1838 †) - (METACERITHIIDAE) (FOSSIL)
- trimontsiana, Bulgarica varnensis trimontsiana A. Irikov, 2006 - (CLAUSILIIDAE)
- trimorpha, Holopella trimorpha L. Waagen, 1880 † - (LOXONEMATIDAE) (FOSSIL)
- trimuense, Tainoceras trimuense Reed, 1944 † - (TAINOCERATIDAE) (FOSSIL)
- trimuensis, Parallelodon trimuensis Reed, 1944 † - (PARALLELODONTIDAE) (FOSSIL)
- trimurti, Stacheoceras trimurti (Diener, 1897 †) - (NEOSTACHEOCERATIDAE) (FOSSIL)
- trimurti, Popanoceras trimurti Diener, 1897 † - syn of: Stacheoceras trimurti (Diener, 1897 †) - (PARAPOPANOCERATIDAE) (FOSSIL)
- TRIMUSCULIDAE J.Q. Burch, 1945 - Family (GASTROPODA-HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-EUPULMONATA [Order]-TRIMUSCULOIDEA [Superfamily])
- Trimusculus, Genus Trimusculus A. Schmidt, 1818 (TRIMUSCULIDAE)
- trina, Microdrillia trina W.C. Mansfield, 1925 - (BORSONIIDAE)
- trina, Pycnoptychia trina C. de la Torre & P. Bartsch, 1972 - (UROCOPTIDAE)
- trina cotorricola, Pycnoptychia trina cotorricola C. de la Torre & P. Bartsch, 1972 - (UROCOPTIDAE)
- trina nazarena, Pycnoptychia trina nazarena C. de la Torre & P. Bartsch, 1972 - (UROCOPTIDAE)
- Trinacria, syn of: Genus Siciliaria W. von Vest, 1867 (CLAUSILIIDAE)
- Trinacria, Genus Trinacria Mayer-Eymar, 1868 † (NOETIIDAE) (FOSSIL)
- trinacriae, Alvania trinacriae J.J. Oberling, 1970 - syn of: Alvania subareolata T.A. de M. Monterosato, 1869 - (RISSOIDAE)
- trinacrus, Unio trinacrus I. Lea, 1861 - syn of: Ptychobranchus foremanianus (I. Lea, 1842) - (UNIONIDAE)
- trinalis, Tessarolax trinalis A. Murphy & P.U. Rodda, 1960 † - (APORRHAIDAE) (FOSSIL)
- trincherasense, Opisthosiphon banaoense trincherasense C. de la Torre & P. Bartsch, 1941 - (POMATIIDAE)
- trincherasensis, Torrecoptis trincherasensis C. de la Torre & P. Bartsch, 1972 - (UROCOPTIDAE)
- trinchesei, Ercolania trinchesei A. Pruvot-Fol, 1951 - (LIMAPONTIIDAE)
- trinchesei, Tylodina trinchesei G.F. Mazzarelli, 1897 - syn of: Tylodina perversa (J.F. Gmelin, 1791) - (TYLODINIDAE)
- Trinchesia, Genus Trinchesia H.F.A. von Ihering, 1879 (TRINCHESIIDAE)
- trinchesii, Pleurotomaria trinchesii C. Gemmellaro, 1889 † - (PLEUROTOMARIIDAE) (FOSSIL)
- trinchesii, Tylodina trinchesii G.F. Mazzarelli, 1897 - syn of: Tylodina perversa (J.F. Gmelin, 1791) - (TYLODINIDAE)
- TRINCHESIIDAE F. Nordsieck, 1972 - Family (GASTROPODA-HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-NUDIBRANCHIA [Order]-FIONOIDEA [Superfamily])
- trinchinopolitense, Cerithium trinchinopolitense E. Forbes, 1846 - (CERITHIIDAE)
- trinchinopolitensis, Arca trinchinopolitensis E. Forbes, 1846 - (ARCIDAE)
- trinchinopolitensis, Murex trinchinopolitensis E. Forbes, 1846 - (MURICIDAE)
- trincincta, Turritella trincincta (S. Borson, 1821 †) - (TURRITELLIDAE) (FOSSIL)
- trindadense, Caecum trindadense S.F.B. de Lima, F.N. Santos & R.S. Absalão, 2013 - (CAECIDAE)
- trindadensis, Bulimulus trindadensis A.S.H. Breure & A.C. dos Santos Coelho, 1976 - syn of: Vegrandinia trindadensis (A.S.H. Breure & A.C. dos Santos Coelho, 1976) - (BULIMULIDAE)
- trindadensis, Vegrandinia trindadensis (A.S.H. Breure & A.C. dos Santos Coelho, 1976) - (SUBULINIDAE)
- Trinema, Genus Trinema Cook, 1997 † (TURRITELLIDAE) (FOSSIL)
- tringa, Nitidella tringa J.S. Schröter, 1783 - syn of: Nitidella nitida (J.B.P.A. Lamarck, 1822) - (COLUMBELLIDAE)
- tringa, Columbella tringa C. Linnaeus, 1758 - syn of: Columbella rustica (C. Linnaeus, 1758) - (COLUMBELLIDAE)
- tringa, Columbella tringa P.L. Duclos, 1840 - syn of: Pyrene flava (J.G. Bruguière, 1789) - (COLUMBELLIDAE)
- tringa, Columbella tringa J.S. Schröter, 1783 - syn of: Nitidella nitida (J.B.P.A. Lamarck, 1822) - (COLUMBELLIDAE)
- tringa, Nassa tringa S.M. Souverbie, 1864 † - syn of: Reticunassa paupera (A.A. Gould, 1850 †) - (NASSARIIDAE) (FOSSIL)
- tringa, Oliva tringa P.L. Duclos, 1840 - syn of: Oliva tricolor J.B.P.A. Lamarck, 1811 - (OLIVIDAE)
- tringa, Voluta tringa C. Linnaeus, 1758 - syn of: Columbella rustica (C. Linnaeus, 1758) - (VOLUTIDAE)
- tringa, Voluta tringa J.S. Schröter, 1783 - syn of: Nitidella nitida (J.B.P.A. Lamarck, 1822) - (VOLUTIDAE)
- tringa tankervillei, Pyrene tringa tankervillei R.P.J. Hervier, 1899 - syn of: Pyrene obtusa tankervillei R.P.J. Hervier, 1899 - (COLUMBELLIDAE)
- Trinia, syn of: Genus Heliacus D'Orbigny, 1842 (ARCHITECTONICIDAE)
- triniada, Glyphostoma triniada W.C. Mansfield, 1925 † - (CLATHURELLIDAE) (FOSSIL)
- trinidadense, Karsteniceras trinidadense Vasicek & Wledmann, 1994 † - (LEPTOCERATOIDIDAE) (FOSSIL)
- trinidadensis, Benueites trinidadensis Renz, 1982 † - (ACANTHOCERATIDAE) (FOSSIL)
- trinidadensis, Bulimulus trinidadensis A.S.H. Breure & A.C. dos Santos Coelho, 1976 - (BULIMULIDAE)
- trinidadensis, Venericardia trinidadensis C.J. Maury, 1925 † - (CARDITIDAE) (FOSSIL)
- trinidadensis, Syntomodrillia trinidadensis P.J. Fallon, 2016 - (DRILLIIDAE)
- trinidadensis, Leucozonia trinidadensis G.J. Vermeij, 1997 - (FASCIOLARIIDAE)
- trinidadensis, Leucozonia trinidadensis D. Mallard & A. Robin, 2005 - syn of: Leucozonia nassa (J.F. Gmelin, 1791) - (FASCIOLARIIDAE)
- trinidadensis, Nerita ascensionis trinidadensis G.J. Vermeij, 1970 - (NERITIDAE)
- trinidadensis, Oliva trinidadensis C.J. Maury, 1912 † - (OLIVIDAE) (FOSSIL)
- trinidadensis, Torrella trinidadensis C. de la Torre & P. Bartsch, 1941 - (POMATIIDAE)
- trinidadensis, Microceramus trinidadensis C. de la Torre & P. Bartsch, 1972 - (UROCOPTIDAE)
- Trinisphinctes
Trinisphinctes, syn of: Genus Poculisphinctes Buckman, 1920 † (PERISPHINCTIDAE) (FOSSIL)
- trinitalis, Eurytellina trinitalis (J.R. le B. Tomlin, 1929) - syn of: Tellina trinitatis (J.R. le B. Tomlin, 1929) - (TELLINIDAE)
- trinitaria, Zachrysia trinitaria (J. Gundlach in L. Pfeiffer, 1858) - (CAMAENIDAE)
- trinitaria, Hybolophus trinitaria (C.J. Maury, 1925 †) - (CRASSATELLIDAE) (FOSSIL)
- trinitaria, Kipia trinitaria Harris & Hodson 1922 † - (HIPPURITIDA (UNASSIGNED)) (FOSSIL)
- trinitaria, Pyrula trinitaria C.J. Maury, 1925 † - syn of: Ficus carbasea R.J.L. Guppy, 1866 † - (MELONGENIDAE) (FOSSIL)
- trinitaria, Varicella trinitaria (J. Gundlach in F. Poey, 1858) - (OLEACINIDAE)
- trinitaria, Tamayoa trinitaria (E.A. Smith, 1898) - (SCOLODONTIDAE)
- trinitaria, Florimetis trinitaria (W.H. Dall, 1900 †) - (TELLINIDAE) (FOSSIL)
- trinitaria, Turritella trinitaria C.J. Maury, 1925 † - syn of: Turritella abrupta E.M. Spieker, 1922 † - (TURRITELLIDAE) (FOSSIL)
- trinitaria, Brachypodella trinitaria (L. Pfeiffer, 1860) - (UROCOPTIDAE)
- trinitaria venezuelana, Hybolophus trinitaria venezuelana (F. Hodson, 1929 †) - (CRASSATELLIDAE) (FOSSIL)
- trinitarius, Drymaeus trinitarius E.A. Smith, 1896 - syn of: Drymaeus imperfectus (R.J.L. Guppy, 1866) - (BULIMULIDAE)
- trinitarius, Tenorioconus mappa trinitarius (C.H. Hwass, 1792) - (CONIDAE)
- Trinitasia, Genus Trinitasia Maury, 1928 (MACTRIDAE)
- trinitatensis, Bythinella trinitatensis E. Caziot, 1910 - (BYTHINELLIDAE)
- trinitatensis, Conus trinitatensis W.C. Mansfield, 1925 † - (CONIDAE) (FOSSIL)
- trinitatensis, Trona trinitatensis W.C. Mansfield, 1925 † - (CYPRAEIDAE) (FOSSIL)
- trinitatensis, Gibberula trinitatensis W.C. Mansfield, 1925 † - (CYSTISCIDAE) (FOSSIL)
- trinitatensis, Purpura trinitatensis R.J.L. Guppy, 1869 - syn of: Thaisella coronata (J.B.P.A. Lamarck, 1816) - (MURICIDAE)
- trinitatensis, Phos trinitatensis W.C. Mansfield, 1925 † - (NASSARIIDAE) (FOSSIL)
- trinitatensis, Nassarius trinitatensis P.O. Jung, 1969 † - (NASSARIIDAE) (FOSSIL)
- trinitatensis, Amauropsis trinitatensis W.C. Mansfield, 1925 † - (NATICIDAE) (FOSSIL)
- trinitatensis, Hindsiclava consors trinitatensis (W.C. Mansfield, 1925) - (PSEUDOMELATOMIDAE)
- trinitatis, Alaria trinitatis Tawney, 1874 † - syn of: Spiniloma trinitatis (Tawney, 1874 †) - (APORRHAIDAE) (FOSSIL)
- trinitatis, Laevicardium trinitatis J.R. le B. Tomlin, 1929 - syn of: Laevicardium pristis (J.B.G.M. Bory De Saint-Vincent, 1827) - (CARDIIDAE)
- trinitatis, Avenionia trinitatis E. Caziot, 1910 - syn of: Avenionia brevis (J.P.R. Draparnaud, 1805) - (HYDROBIIDAE)
- trinitatis, Spiniloma trinitatis (Tawney, 1874 †) - (SPINILOMATIDAE) (FOSSIL)
- trinitatis, Tellina trinitatis (J.R. le B. Tomlin, 1929) - (TELLINIDAE)
- trinitatis, Eurytellina trinitatis (J.R. le B. Tomlin, 1929) - syn of: Tellina trinitatis (J.R. le B. Tomlin, 1929) - (TELLINIDAE)
- trinitatis, Turbinella trinitatis C.J. Maury, 1925 † - (TURBINELLIDAE) (FOSSIL)
- trinitatis, Katherinella trinitatis H.B. Stenzel & al., 1957 † - (VENERIDAE) (FOSSIL)
- trinitense, Knemiceras trinitense P.H. Scott, 1940 † - syn of: Parengonoceras roemeri (Cragin, 1893 †) - (KNEMICERATIDAE) (FOSSIL)
- trinitense, Phyllopachyceras trinitense Anderson, 1938 † - (PHYLLOCERATIDAE) (FOSSIL)
- trinitensis, Neocyclotus translucidus trinitensis (R.J.L. Guppy, 1864) - (NEOCYCLOTIDAE)
- Trinitoceras, Genus Trinitoceras Flower, 1976 † (ENDOCERIDA (UNASSIGNED)) (FOSSIL)
- trinodiferus, Calyptraphorus trinodiferus T.A. Conrad, 1857 † - (ROSTELLARIIDAE) (FOSSIL)
- trinodis, Aspasita triarius trinodis (M. von Kimakowicz, 1883) - (SPELAEODISCIDAE)
- trinodosa, Trigonostoma trinodosa J.C. Chenu, 1859 - syn of: Trigonostoma tuberculosum (G.B. I Sowerby, 1832) - (CANCELLARIIDAE)
- trinodosa, Cancellaria trinodosa J.C. Chenu, 1859 - syn of: Trigonostoma tuberculosum (G.B. I Sowerby, 1832) - (CANCELLARIIDAE)
- trinodosa, Costaclymenia binodosa trinodosa C.N. Lange, 1929 † - (COSTACLYMENIIDAE) (FOSSIL)
- trinodosa, Hamulina trinodosa A.V.M.D. D'Orbigny, 1852 † - syn of: Dissimilites trinodosus (A.V.M.D. D'Orbigny, 1852 †) - (HAMULINIDAE) (FOSSIL)
- trinodosa, Nassa trinodosa E.A. Smith, 1876 - syn of: Hebra corticata (A. Adams, 1852) - (NASSARIIDAE)
- trinodosa, Chanasia trinodosa Gerard & Contaut, 1936 † - (OPPELIIDAE) (FOSSIL)
- trinodosa, Miralda trinodosa Peñas & Rolán, 2017 - (PYRAMIDELLIDAE)
- trinodosa, Rissoa trinodosa A.G. de Rayneval & G. Ponzi, 1854 - syn of: Chrysallida excavata (R.A. Philippi, 1836) - (RISSOIDAE)
- trinodosum, Barroisiceras trinodosum Moreman, 1927 † - syn of: Metoicoceras gibbosum A. Hyatt, 1903 † - (COLLIGNONICERATIDAE) (FOSSIL)
- trinodosum, Himantoceras trinodosum Thieuloy, 1965 † - (HIMANTOCERATIDAE) (FOSSIL)
- trinodosus, Dissimilites trinodosus (A.V.M.D. D'Orbigny, 1852 †) - (ACRIOCERATIDAE) (FOSSIL)
- trinodosus, Phlycticrioceras trinodosus (H.B. Geinitz, 1850 †) - (ANISOCERATIDAE) (FOSSIL)
- trinodosus, Paraceratites trinodosus (Mojsisovics, 1882 †) - (CERATITIDAE) (FOSSIL)
- trinodosus, Murex trinodosus R. Tate, 1888 † - (MURICIDAE) (FOSSIL)
- trinodosus, Pleuronautilus trinodosus Mojsisovics, 1882 † - (TAINOCERATIDAE) (FOSSIL)
- trinodosus, Argolites trinodosus Balini & al., 2006 † - (TRACHYCERATIDAE) (FOSSIL)
- trinquieri, Nisiturris trinquieri (E. Saurin, 1959) - (PYRAMIDELLIDAE)
- trintrea, Cirsotrema trintrea C. Nielsen, 2003 † - (EPITONIIDAE) (FOSSIL)
- trinurcina, Anodonta trinurcina É.A.A. Locard, 1890 - syn of: Anodonta cygnea (C. Linnaeus, 1758) - (UNIONIDAE)
- triodon, Sesara triodon Tanmuangpak & Tumpeesuwan, 2017 - (HELICARIONIDAE)
- triodon, Trifaux triodon H.B. Baker, 1935 - (SAGDIDAE)
- triodonta, Pseudobythinella triodonta Y.Y. Liu, Y.X. Wang & W.Z. Zhang, 1991 - (AMNICOLIDAE)
- triodonta, Isomeria triodonta (A.V.M.D. D'Orbigny, 1835) - (CAMAENIDAE)
- Triodonta, syn of: Genus Erycinella Conrad, 1845 † (CONDYLOCARDIIDAE) (FOSSIL)
- Triodonta, syn of: Genus Lucinoma W.H. Dall, 1901 (LUCINIDAE)
- Triodonta, syn of: Genus Daedalochila H.H. Beck, 1837 (POLYGYRIDAE)
- triodontoides, Daedalochila triodontoides T.B. Bland, 1861 - (POLYGYRIDAE)
- Triodontopsis, syn of: Genus Triodopsis C.S. Rafinesque, 1819 (POLYGYRIDAE)
- Triodopsis, Genus Triodopsis C.S. Rafinesque, 1819 (POLYGYRIDAE)
- triodos, Isabellaria perplana triodos H. Nordsieck, 1974 - (CLAUSILIIDAE)
- triodus, Helicodiscus triodus L.R. Hubricht, 1958 - (HELICODISCIDAE)
- Triomphalia, syn of: Subgenus Jouannetia (Pholadopsis) T.A. Conrad, 1849 (PHOLADIDAE)
- trionyma, Nannamoria trionyma T.A. Darragh, 1988 † - (VOLUTIDAE) (FOSSIL)
- Triopa, syn of: Genus Limacia O.F. Müller, 1781 (POLYCERIDAE)
- Triopella, syn of: Genus Aegires S.L. Lovén, 1844 (AEGIRIDAE)
- Triopha, Genus Triopha L.S.R. Bergh, 1880 (POLYCERIDAE)
- triophina, Himatella triophina L.S.R. Bergh, 1890 - syn of: Flabellina trophina (L.S.R. Bergh, 1890) - (FLABELLINIDAE)
- triornatum, Caecum triornatum L. de Folin, 1870 - syn of: Caecum bipartitum L. de Folin, 1870 - (CAECIDAE)
- triornatum, Apoderoceras triornatum S.S. Buckman † - (COELOCERATIDAE) (FOSSIL)
- Triozites, Genus Triozites Buckman, 1924 † (AMMONOIDEA (UNASSIGNED)) (FOSSIL)
- tripa, Ranularia tripa (J.B.P.A. Lamarck, 1822) - (RANELLIDAE)
- Tripachatina, Subgenus Achatina (Tripachatina) J.R. Bourguignat, 1889 (ACHATINIDAE)
- tripaloi, Bania tripaloi (Š. Brusina, 1884 †) - (HYDROBIIDAE) (FOSSIL)
- tripaloi, Melanopsis tripaloi J.R. Bourguignat, 1880 † - syn of: Melanopsis geniculata Š. Brusina, 1874 † - (MELANOPSIDAE) (FOSSIL)
- triparietalis, Cassidula triparietalis E.C. Von Martens, 1897 - (ELLOBIIDAE)
- Tripartella, Genus Tripartella Gruendel, 1998 (TRIPARTELLIDAE) (FOSSIL)
- TRIPARTELLIDAE Gründel, 2001 † - Family (GASTROPODA-CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-LITTORINOIDEA [Superfamily]) (FOSSIL)
- triparticostata, Cardita triparticostata R.B. Newton, 1922 † - (CARDITIDAE) (FOSSIL)
- tripartita, Clavatula tripartita (H.C. Weinkauff, 1876) - (CLAVATULIDAE)
- tripartita, Clione tripartita Janssen, 2012 † - (CLIONIDAE) (FOSSIL)
- tripartita, Galeomma tripartita R. von Cosel, 1995 - (GALEOMMATIDAE)
- tripartita, Mactra tripartita E. Forbes, 1846 - (MACTRIDAE)
- tripartita, Malletia tripartita B. Prashad, 1932 - (MALLETIIDAE)
- tripartita, Volvarina tripartita T. Cossignani, 2006 - (MARGINELLIDAE)
- tripartita, Goniobasis tripartita (L.A. Reeve, 1860) - (PLEUROCERIDAE)
- tripartita, Psammobia tripartita G.P. Deshayes, 1855 - syn of: Gari amethystus (W. Wood, 1815) - (PSAMMOBIIDAE)
- tripartita, Pleurotoma tripartita H.C. Weinkauff, 1876 - syn of: Clavatula tripartita (H.C. Weinkauff, 1876) - (TURRIDAE)
- tripartita, Xylophaga tripartita (Deshayes 1856) † - (XYLOPHAGAIDAE) (FOSSIL)
- Tripartites, Genus Tripartites Farsan, 1981 † (TENTACULITIDAE) (FOSSIL)
- tripartitum, Conocardium tripartitum R.M. Branson, 1942 † - (CONOCARDIIDAE) (FOSSIL)
- tripartitum, Nannolytoceras tripartitum (Raspail, 1831 †) - (NANNOLYTOCERATIDAE) (FOSSIL)
- tripartitus, Playfordites tripartitus (C.L.F. von Sandberger & C.L.F. von Sandberger, 1850 †) - (GEPHUROCERATIDAE) (FOSSIL)
- tripartitus, Goniatites tripartitus G.G. Münster, 1842 † - syn of: Prionoceras divisum (G.G. Münster, 1832 †) - (GONIATITIDAE) (FOSSIL)
- tripartitus, Acrocoelites tripartitus (von Schlotheim, 1820 †) - (MEGATEUTHIDIDAE) (FOSSIL)
- tripartitus, Mimosphinctes tripartitus Eichenberg, 1931 † - (MIMOSPHINCTIDAE) (FOSSIL)
- tripartitus, Leiosolenus tripartitus (F.P. Jousseaume, 1894) - (MYTILIDAE)
- tripartitus, Grammatodon tripartitus A.E.M. Cossmann, 1915 † - (PARALLELODONTIDAE) (FOSSIL)
- tripartitus, Unio tripartitus I. Lea, 1863 - syn of: Parreysia favidens (W.H. Benson, 1862) - (UNIONIDAE)
- tripartitus lineatus, Goniatites tripartitus lineatus G.G. Münster, 1842 † - syn of: Prionoceras divisum (G.G. Münster, 1832 †) - (GONIATITIDAE) (FOSSIL)
- triphera, Cernuella triphera J.R. Bourguignat in É.A.A. Locard, 1882 - syn of: Cernuella neglecta (J.P.R. Draparnaud, 1805) - (HYGROMIIDAE)
- triphera, Oenopota triphera (A.N. Golikov & O.A. Scarlato, 1967) - (MANGELIIDAE)
- triphera, Lora triphera A.N. Golikov & O.A. Scarlato, 1967 - syn of: Oenopota triphera (A.N. Golikov & O.A. Scarlato, 1967) - (TURRIDAE)
- tripherus, Boreotrophon tripherus W.H. Dall, 1902 - (MURICIDAE)
- triphooki, Chlamys triphooki (C.A. von Zittel, 1864 †) - (PECTINIDAE) (FOSSIL)
- Triphora, Genus Triphora H.M.D. De Blainville, 1828 (TRIPHORIDAE)
- TRIPHORIDAE J.E. Gray, 1847 - Family (GASTROPODA-CAENOGASTROPODA [Subclass]-TRIPHOROIDEA [Superfamily])
- Triphoris, syn of: Genus Triphora H.M.D. De Blainville, 1828 (TRIPHORIDAE)
- triphylla, Atagema triphylla L.S.R. Bergh, 1881 - syn of: Atagema ornata (C.G. Ehrenberg, 1831) - (DISCODORIDIDAE)
- triphyllon, Pyktes triphyllon W.P. Popenoe, 1983 † - (PUGNELLIDAE) (FOSSIL)
- triphyllum, Pharciceras triphyllum (Frech, 1888 †) - (PHARCICERATIDAE) (FOSSIL)
- triphyllum, Prolecanites triphyllum Frech, 1888 † - syn of: Pharciceras triphyllum (Frech, 1888 †) - (PROLECANITIDAE) (FOSSIL)
- Tripia, Subgenus Crassispira (Tripia) A. De Gregorio, 1890 † (PSEUDOMELATOMIDAE) (FOSSIL)
- tripictus, Mesembrinus tripictus J.A. Albers, 1857 - (BULIMULIDAE)
- tripictus hoffmanni, Mesembrinus tripictus hoffmanni E.C. Von Martens, 1893 - (BULIMULIDAE)
- Tripidotomaria, Genus Tripidotomaria † (ARCHAEOGASTROPODA (UNASSIGNED)) (FOSSIL)
- tripilia, Clathropsis tripilia (C.F. Laseron, 1951) - (CERITHIOPSIDAE)
- tripla, Bucanella tripla (R.P. Whitfield, 1889 †) - (BUCANELLIDAE) (FOSSIL)
- tripla, Bucania tripla R.P. Whitfield, 1889 † - syn of: Bucanella tripla (R.P. Whitfield, 1889 †) - (BUCANIIDAE) (FOSSIL)
- tripla, Tivela tripla (C. Linnaeus, 1758) - (VENERIDAE)
- tripla, Pelecyora tripla (A. Römer, 1860) - (VENERIDAE)
- Triplaniceras, Genus Triplaniceras Bert, 2008 † (HAMITIDAE) (FOSSIL)
- Tripleura, Genus Tripleura Sandberger, 1889 † (CARDIIDA (UNASSIGNED)) (FOSSIL)
- tripleura, Aspidotheca tripleura (A. Fuchs, 1913 †) - (PTEROTHECIDAE) (FOSSIL)
- Tripleuroceras, Genus Tripleuroceras Hyatt, 1884 † (TRIPLEUROCERATIDAE) (FOSSIL)
- TRIPLEUROCERATIDAE Foerste, 1926 † - Family (CEPHALOPODA-NAUTILOIDEA [Subclass]-ONCOCERIDA [Order]) (FOSSIL)
- tripleuroptyx, Stereophaedusa tripleuroptyx H.A. Pilsbry, 1909 - (CLAUSILIIDAE)
- triplex, Chondrina triplex C. Altimira, 1959 - syn of: Chondrina farinesii C. des Moulins, 1835 - (CHONDRINIDAE)
- triplex, Dorsoplanites triplex Spath, 1936 † - (DORSOPLANITIDAE) (FOSSIL)
- Triplex, Subgenus Chicoreus (Triplex) G. Perry, 1810 (MURICIDAE)
- triplex, Stuorella triplex Böhm, 1895 † - syn of: Codinella tardemutata (E.A.L. Kittl, 1894 †) - (STUORELLIDAE) (FOSSIL)
- triplicata, Auriculella triplicata W.H. Pease - syn of: Auriculella auricula (A.E.J. Férussac, 1821) - (ACHATINELLIDAE)
- triplicata, Eurasenia triplicata Mesezhnikov, 1984 † - (AULACOSTEPHANIDAE) (FOSSIL)
- triplicata, Chondrina triplicata P. Fagot, 1888 - syn of: Chondrina farinesii C. des Moulins, 1835 - (CHONDRINIDAE)
- triplicata, Clausilia triplicata E.C. Von Martens, 1857 - syn of: Clausilia cruciata (S.E. Studer, 1820) - (CLAUSILIIDAE)
- triplicata, Clio triplicata Audenino, 1899 † - (CLIIDAE) (FOSSIL)
- triplicata, Tralia triplicata E. Donovan, 1803 - syn of: Tralia ovula (J.G. Bruguière, 1789) - (ELLOBIIDAE)
- triplicata, Ovatella triplicata J.R. Bourguignat, 1864 - syn of: Myosotella myosotis (J.P.R. Draparnaud, 1801) - (ELLOBIIDAE)
- triplicata, Hyalina triplicata Boyer, 2017 - (MARGINELLIDAE)
- triplicata, Serrata triplicata J.S. Gaskoin, 1849 - syn of: Serrata guttula (G.B. I Sowerby, 1832) - (MARGINELLIDAE)
- triplicata, Mitra triplicata E.C. Von Martens, 1904 - (MITRIDAE)
- triplicata, Pupilla triplicata (S.E. Studer, 1820) - (PUPILLIDAE)
- triplicata, Pyramidella triplicata B. Wade, 1917 - (PYRAMIDELLIDAE)
- triplicata, Turritella triplicata (G.B. Brocchi, 1814 †) - (TURRITELLIDAE) (FOSSIL)
- triplicata, Liocallonia triplicata (R. Arango, 1882) - (UROCOPTIDAE)
- triplicata, Truncatellina triplicata J.R. Bourguignat, 1867 - syn of: Truncatellina callicratis (A. Scacchi, 1833) - (VERTIGINIDAE)
- triplicata, Palaeomelon triplicata (Sowerby, 1846 †) - (VOLUTIDAE) (FOSSIL)
- triplicata cylindrata, Pupilla triplicata cylindrata O. Böttger, 1879 - syn of: Pupilla triplicata (S.E. Studer, 1820) - (PUPILLIDAE)
- triplicata luxurians, Pupilla triplicata luxurians O.W.H. Reinhardt, 1877 - syn of: Pupilla triplicata (S.E. Studer, 1820) - (PUPILLIDAE)
- triplicata suboviformis, Pupilla triplicata suboviformis O. Böttger, 1879 - syn of: Pupilla triplicata (S.E. Studer, 1820) - (PUPILLIDAE)
- triplicatilla, Volvarina triplicatilla J. Espinosa & J.A. Ortea, 2006 - (MARGINELLIDAE)
- triplicatus, Cantharus triplicatus P.F. Röding, 1798 - syn of: Bivetiella cancellata (C. Linnaeus, 1767) - (BUCCINIDAE)
- triplicatus, Inbiocystiscus triplicatus J. Espinosa & J.A. Ortea, 2007 - (CYSTISCIDAE)
- triplicatus, Gerasimovcyclus triplicatus (Martin, 1862 †) - (EUCYCLIDAE) (FOSSIL)
- Triplicitella, Genus Triplicitella K. S. Collins, Crampton & M. Hannah, 2014 † (CRASSATELLIDAE) (FOSSIL)
- Triplicosta, Genus Triplicosta Cooper, 1896 † (PHOLADOMYOIDEA (UNASSIGNED)) (FOSSIL)
- triplistriata, Palaeolima triplistriata (Stevens, 1858 †) - (LIMIDAE) (FOSSIL)
- triploaculeatus, Bolinus brandaris triploaculeatus F. Settepassi, 1967 - (MURICIDAE)
- Triploca, Genus Triploca Tate, 1893 † (ACTEONIDAE) (FOSSIL)
- Triplodon, Genus Triplodon J.B. von Spix & A. Wagner, 1827 (HYRIIDAE)
- Triplofusus, Genus Triplofusus A.A. Olsson & A. Harbison, 1953 (FASCIOLARIIDAE)
- triploma, Annularia triploma H.B. Baker, 1934 - syn of: Annularia triploploma (H.B. Baker, 1934) - (POMATIIDAE)
- Triplooceras, Genus Triplooceras Hyatt, 1884 † (NEPHRITICERATIDAE) (FOSSIL)
- triploploma, Annularia triploploma (H.B. Baker, 1934) - (POMATIIDAE)
- triplopoma, Annularia triplopoma H.B. Baker, 1934 - syn of: Annularia triploploma (H.B. Baker, 1934) - (POMATIIDAE)
- triplostephanus, Solariella triplostephanus W.H. Dall, 1910 - (SOLARIELLIDAE)
- Triplostephanus, Genus Triplostephanus W.H. Dall, 1908 (TEREBRIDAE)
- tripolia, Globovula tripolia C.N. Cate, 1973 - syn of: Globovula cavanaghi (T. Iredale, 1931) - (OVULIDAE)
- tripolitana kebirensis, Leguminaia tripolitana kebirensis P.M. Pallary, 1939 - syn of: Leguminaia saulcyi (J.R. Bourguignat, 1852) - (UNIONIDAE)
- tripolitanus, Unio tripolitanus J.R. Bourguignat, 1852 - syn of: Leguminaia saulcyi (J.R. Bourguignat, 1852) - (UNIONIDAE)
- Tripoplax, Subgenus Lepidozona (Tripoplax) S.S. Berry, 1919 (ISCHNOCHITONIDAE)
- triporcata, Microdrillia triporcata (E.A. Smith, 1879) - (BORSONIIDAE)
- triporcata, Trochonema triporcata (McCoy) † - (TROCHONEMATIDAE) (FOSSIL)
- triporcata, Pleurotoma triporcata E.A. Smith, 1879 - syn of: Microdrillia triporcata (E.A. Smith, 1879) - (TURRIDAE)
- triporcatum, Calliostoma triporcatum (P. Dautzenberg & H. Fischer, 1906) - (CALLIOSTOMATIDAE)
- triporcatus, Zizyphinus triporcatus É.A.A. Locard, 1898 - syn of: Calliostoma milneedwardsi (É.A.A. Locard, 1898) - (CALLIOSTOMATIDAE)
- Trippa, Genus Trippa L.S.R. Bergh, 1878 (DISCODORIDIDAE)
- trippae, Leptoconus trippae E.J. Petuch, 1991 - syn of: Gradiconus largillierti (L.C. Kiener, 1847) - (CONIDAE)
- trippae, Muricanthus trippae E.J. Petuch, 1991 - syn of: Hexaplex fulvescens Sowerby, 1834 - (MURICIDAE)
- trippeana, Siphocypraea trippeana J.J. Parodiz, 1988 † - (CYPRAEIDAE) (FOSSIL)
- trippneri, Amalda trippneri R.N. Kilburn, 1996 - (ANCILLARIIDAE)
- Tripsycha, Genus Tripsycha A.M. Keen, 1961 (VERMETIDAE)
- tripsycha, Tripsycha tripsycha (H.A. Pilsbry & H.N. Lowe, 1932) - (VERMETIDAE)
- tripter, Drillia tripter H.F. Von Maltzan, 1883 - (DRILLIIDAE)
- tripter, Crassispira tripter H. von Maltzan, 1883 - syn of: Drillia tripter H.F. Von Maltzan, 1883 - (PSEUDOMELATOMIDAE)
- TRIPTERIDAE - syn of Family: CLIIDAE
- Tripteroceras, Genus Tripteroceras Hyatt, 1884 † (TRIPTEROCERATIDAE) (FOSSIL)
- TRIPTEROCERATIDAE Flower, 1941 † - Family (CEPHALOPODA-NAUTILOIDEA [Subclass]-ORTHOCERIDA [Order]) (FOSSIL)
- Tripterocerina, Genus Tripterocerina Foerste, 1935 † (TRIPTEROCERATIDAE) (FOSSIL)
- Tripteroceroides, Genus Tripteroceroides Miller & Furnish, 1940 † (SPYROCERATIDAE) (FOSSIL)
- tripteroides, Pterynotus tripteroides (J.B.P.A. Lamarck, 1822 †) - (MURICIDAE) (FOSSIL)
- Tripterotyphis, Genus Tripterotyphis H.A. Pilsbry & R.T. Lowe, 1932 (MURICIDAE)
- tripterus, Pterynotus tripterus (I. von Born, 1778) - (MURICIDAE)
- tripterus, Pterotyphis tripterus (J.P.S. Grateloup, 1836 †) - (MURICIDAE) (FOSSIL)
- tripterus, Typhis tripterus R. Tate, 1888 † - (MURICIDAE) (FOSSIL)
- tripterus, Pterymarchia tripterus (I. von Born, 1778) - syn of: Pterynotus tripterus (I. von Born, 1778) - (MURICIDAE)
- triptolemus, Stemmatoceras triptolemus (Morris & J. Lycett, 1851 †) - (STEPHANOCERATIDAE) (FOSSIL)
- triptum, Vexillum triptum J. Gardner, 1937 † - (COSTELLARIIDAE) (FOSSIL)
- triptus, Cymatium triptus J.B.P.A. Lamarck, 1822 - syn of: Ranularia tripa (J.B.P.A. Lamarck, 1822) - (RANELLIDAE)
- triptycha, Sagda triptycha (L. Pfeiffer, 1859) - (SAGDIDAE)
- Triptychia, Genus Triptychia Sandberger, 1876 † (FILHOLIIDAE) (FOSSIL)
- triptychiformis, Russanovia triptychiformis (Nikitin, 1888 †) - (POLYPTYCHITIDAE) (FOSSIL)
- Triptychus, Genus Triptychus O.A.L. Mörch, 1875 (PYRAMIDELLIDAE)
- triptyx, Oospira triptyx H. Nordsieck, 2011 - (CLAUSILIIDAE)
- triptyx, Ischnocion triptyx (H.A. Pilsbry, 1908) - (SUBULINIDAE)
- tripunctata, Cypraea tripunctata M.E.J. Bucquoy & al., 1883 - syn of: Trivia monacha (da Costa, 1778) - (CYPRAEIDAE)
- tripunctatus, Fusus tripunctatus Wissmann, 1841 † - syn of: Cheilotomona blumi (Wissmann, 1841 †) - (FASCIOLARIIDAE) (FOSSIL)
- triquestra, Euomphalus triquestra Lindström, 1884 † - syn of: Pachystrophia triquestra (Lindström, 1884 †) - (EUOMPHALIDAE) (FOSSIL)
- triquestra, Pachystrophia triquestra (Lindström, 1884 †) - (HOLOPEIDAE) (FOSSIL)
- triquestra, Lytospira triquestra Lindström, 1884 † - syn of: Pachystrophia triquestra (Lindström, 1884 †) - (OPHILETIDAE) (FOSSIL)
- triqueter, Nuculites triqueter T.A. Conrad, 1841 † - (MALLETIIDAE) (FOSSIL)
- triqueter, Neomegalodon triqueter (Wulfen, 1793 †) - (MEGALODONTIDAE) (FOSSIL)
- triqueter, Megalodus triqueter Wulfen, 1793 † - syn of: Neomegalodon triqueter (Wulfen, 1793 †) - (MEGALODONTIDAE) (FOSSIL)
- triqueter, Naquetia triqueter (I. von Born, 1778) - (MURICIDAE)
- triqueter, Chicoreus triqueter M. Couturier, 1907 - syn of: Naquetia cumingii (A. Adams, 1853) - (MURICIDAE)
- triqueter, Pterinea triqueter T.A. Conrad, 1838 † - syn of: Gosseletia triquetra (T.A. Conrad, 1838 †) - (PTERINEIDAE) (FOSSIL)
- triqueter, Vermetus triqueter Ant. Bivona-Bernardi, 1832 - syn of: Vermetus triquetrus Ant. Bivona-Bernardi, 1832 - (VERMETIDAE)
- triqueter amanuensis, Chicoreus triqueter amanuensis M. Couturier, 1907 - syn of: Naquetia cumingii (A. Adams, 1853) - (MURICIDAE)
- triqueter bicarinatus, Vermetus triqueter bicarinatus T.A. de M. Monterosato, 1892 - syn of: Vermetus triquetrus Ant. Bivona-Bernardi, 1832 - (VERMETIDAE)
- triqueter discoideus, Vermetus triqueter discoideus T.A. de M. Monterosato, 1892 - syn of: Vermetus triquetrus Ant. Bivona-Bernardi, 1832 - (VERMETIDAE)
- triqueter pinnicola, Vermetus triqueter pinnicola O.A.L. Mörch, 1862 - syn of: Vermetus granulatus (J.L.C. Gravenhorst, 1831) - (VERMETIDAE)
- triqueter repens, Vermetus triqueter repens T.A. de M. Monterosato, 1892 - syn of: Vermetus triquetrus Ant. Bivona-Bernardi, 1832 - (VERMETIDAE)
- triquetra, Gosseletia triquetra (T.A. Conrad, 1838 †) - (AMBONYCHIIDAE) (FOSSIL)
- triquetra, Mytilarca triquetra T.A. Conrad, 1838 † - syn of: Gosseletia triquetra (T.A. Conrad, 1838 †) - (AMBONYCHIIDAE) (FOSSIL)
- triquetra, Astarte triquetra T.A. Conrad, 1846 - syn of: Parastarte triquetra (T.A. Conrad, 1846) - (ASTARTIDAE)
- triquetra, Gosselettia triquetra J.W. Hall, 1884 † - (BIVALVIA INCERTAE SEDIS) (FOSSIL)
- triquetra, Cassis triquetra E. Rigacci, 1866 - syn of: Cassis tuberosa (C. Linnaeus, 1758) - (CASSIDAE)
- triquetra, Crassatina triquetra (L.A. Reeve, 1842) - (CRASSATELLIDAE)
- triquetra, Crassinella triquetra N.E. Weisbord, 1964 - syn of: Crassinella dupliniana W.H. Dall, 1903 - (CRASSATELLIDAE)
- triquetra, Gadilina triquetra F. Sacco, 1897 † - syn of: Gadilina taurogracilis F. Sacco, 1897 † - (GADILINIDAE) (FOSSIL)
- Triquetra, syn of: Genus Turquetia C. Vélain, 1877 (GALEOMMATIDAE)
- Triquetra, syn of: Genus Prisodon H.C.F. Schumacher, 1817 (HYRIIDAE)
- triquetra, Anapella triquetra W.H. Dall, 1895 - (MESODESMATIDAE)
- triquetra, Mysella triquetra (A.E. Verrill & K.J. Bush, 1898) - (MONTACUTIDAE)
- triquetra, Eupleura triquetra (L.A. Reeve, 1844) - (MURICIDAE)
- triquetra, Murex triquetra A. Risso, 1826 - syn of: Ocenebra erinaceus (C. Linnaeus, 1758) - (MURICIDAE)
- triquetra, Naquetia triquetra I. von Born, 1778 - syn of: Naquetia triqueter (I. von Born, 1778) - (MURICIDAE)
- triquetra, Nucula triquetra G. Ponzi, 1872 - syn of: Nucula sulcata H.G. Bronn, 1831 - (NUCULIDAE)
- triquetra, Pinna triquetra C. Gemmellaro, 1896 † - (PINNIDAE) (FOSSIL)
- triquetra, Ranella triquetra L.A. Reeve, 1844 - syn of: Eupleura triquetra (L.A. Reeve, 1844) - (RANELLIDAE)
- triquetra, Spheniopsis triquetra (A.E. Verrill & K.J. Bush, 1898) - (SPHENIOPSIDAE)
- triquetra, Dysnomia triquetra (C.S. Rafinesque, 1820) - (UNIONIDAE)
- triquetra, Parastarte triquetra (T.A. Conrad, 1846) - (VENERIDAE)
- Triquetra, syn of: Genus Anomalocardia H.C.F. Schumacher, 1817 (VENERIDAE)
- triquetra fascicularis, Dendropoma triquetra fascicularis O.A.L. Mörch, 1862 - syn of: Vermetus triquetrus Ant. Bivona-Bernardi, 1832 - (VERMETIDAE)
- triquetra serpulina, Dendropoma triquetra serpulina O.A.L. Mörch, 1862 - syn of: Vermetus triquetrus Ant. Bivona-Bernardi, 1832 - (VERMETIDAE)
- triquetra unicarinata, Dendropoma triquetra unicarinata T.A. de M. Monterosato, 1917 - syn of: Vermetus triquetrus Ant. Bivona-Bernardi, 1832 - (VERMETIDAE)
- Triquetrana, Subgenus Triplodon (Triquetrana) Simpson, 1900 (HYRIIDAE)
- triquetrum, Cardium triquetrum Wulfen, 1793 † - syn of: Neomegalodon triqueter (Wulfen, 1793 †) - (CARDIIDAE) (FOSSIL)
- triquetrum, Dentalium triquetrum R. Tate, 1887 † - (DENTALIIDAE) (FOSSIL)
- triquetrum, Anapella triquetrum S.C.T. Hanley, 1843 - syn of: Anapella cycladea (J.B.P.A. Lamarck, 1818) - (MESODESMATIDAE)
- triquetrum, Mesodesma triquetrum S.C.T. Hanley, 1843 - syn of: Anapella cycladea (J.B.P.A. Lamarck, 1818) - (MESODESMATIDAE)
- triquetrus, Murex triquetrus G.S. Coen, 1933 - syn of: Ocenebra erinaceus (C. Linnaeus, 1758) - (MURICIDAE)
- triquetrus, Gyraulus triquetrus (F.M. Hilgendorf, 1867 ) - (PLANORBIDAE)
- triquetrus, Vermetus triquetrus Ant. Bivona-Bernardi, 1832 - (VERMETIDAE)
- triradiata, Tellina triradiata H. Adams, 1871 - (TELLINIDAE)
- triradiata, Unio triradiata I. Lea, 1836 - syn of: Parreysia corrugata (O.F. Müller, 1774) - (UNIONIDAE)
- triradiata, Venus triradiata J.F. Gmelin, 1791 - syn of: Marcia opima (J.F. Gmelin, 1791) - (VENERIDAE)
- triradiata, Venus triradiata H.E. Anton, 1838 - syn of: Anomalocardia subrugosa Wood, 1828 - (VENERIDAE)
- triradiatus, Palliolum triradiatus O.F. Müller, 1776 - syn of: Palliolum tigerinum (O.F. Müller, 1776) - (PECTINIDAE)
- triradiatus, Pecten triradiatus O.F. Müller, 1776 - syn of: Palliolum tigerinum (O.F. Müller, 1776) - (PECTINIDAE)
- Triredimiculum, Genus Triredimiculum Waterhouse, 1983 † (LOPHOSPIRIDAE) (FOSSIL)
- triregensis, Alcithoe triregensis P. Bail & A. Limpus, 2005 - (VOLUTIDAE)
- triregis, Trilirata triregis A. Warén & S. Hain, 1996 - (ZEROTULIDAE)
- Triremia, syn of: Genus Purpurellus F.P. Jousseaume, 1880 (MURICIDAE)
- triremis, Aranea triremis G. Perry, 1811 - syn of: Murex pecten J. Lightfoot, 1786 - (MURICIDAE)
- Triremus, syn of: Genus Purpurellus F.P. Jousseaume, 1880 (MURICIDAE)
- trironatum, Apoderoceras trironatum S.S. Buckman † - syn of: Apoderoceras triornatum S.S. Buckman † - (COELOCERATIDAE) (FOSSIL)
- trirostrata, Sepiola trirostrata N.A. Voss, 1962 - (SEPIOLIDAE)
- trirostris, Unio trirostris W.E. Musgrave, 1863 - syn of: Parreysia favidens (W.H. Benson, 1862) - (UNIONIDAE)
- trirostris, Unio trirostris G.B. Sowerby, 1868 - syn of: Radiatula caerulea (I. Lea, 1831) - (UNIONIDAE)
- trirotundolobatum, Orthonychia trirotundolobatum (Talent & Philip, 1956 †) - (ORTHONYCHIIDAE) (FOSSIL)
- trirotundolobatum, Platyceras trirotundolobatum Talent & Philip, 1956 † - syn of: Orthonychia trirotundolobatum (Talent & Philip, 1956 †) - (PLATYCERATIDAE) (FOSSIL)
- triscalpta, Traumatophora triscalpta (E.C. Von Martens, 1875) - (CAMAENIDAE)
- trisculpta, Socienna trisculpta (W.L. May, 1912) - (CERITHIOPSIDAE)
- trisculptus, Conus trisculptus Pilsbry & Johnson, 1917 † - (CONIDAE) (FOSSIL)
- trisdonta, Pleurodonte trisdonta D'Orbigny, 1835 - (PLEURODONTIDAE)
- Trisecphora, Subgenus Ecphora (Trisecphora) Petuch, 1988 † (MURICIDAE) (FOSSIL)
- triseriale, Cerithium triseriale W.M. Gabb, 1881 - syn of: Bittiolum varium (Pfeiffer, 1840) - (CERITHIIDAE)
- triserialis, Leucozonia triserialis (J.B.P.A. Lamarck, 1822) - (FASCIOLARIIDAE)
- triserialis, Purpura triserialis H.M.D. de Blainville, 1832 - syn of: Vasula speciosa (A. Valenciennes, 1832) - (MURICIDAE)
- triserialis, Tectus triserialis (J.B.P.A. Lamarck, 1822) - (TEGULIDAE)
- triserialis, Inella triserialis (W.H. Dall, 1881) - (TRIPHORIDAE)
- triserialis, Trochus triserialis J.B.P.A. Lamarck, 1822 - syn of: Tectus triserialis (J.B.P.A. Lamarck, 1822) - (TROCHIDAE)
- triserialis, Turbinella triserialis J.B.P.A. Lamarck, 1822 - syn of: Leucozonia triserialis (J.B.P.A. Lamarck, 1822) - (TURBINELLIDAE)
- triserialis hidalgoi, Leucozonia triserialis hidalgoi J.C.H. Crosse, 1865 - (FASCIOLARIIDAE)
- triseriata, Iphinopsis triseriata A.N. Golikov, 1986 - syn of: Neoiphinoe triseriata (A.N. Golikov, 1986) - (CANCELLARIIDAE)
- triseriata, Neoiphinoe triseriata (A.N. Golikov, 1986) - (CAPULIDAE)
- triseriata, Euspira triseriata (T. Say, 1826) - (NATICIDAE)
- triseriata, Natica triseriata T. Say, 1826 - syn of: Euspira triseriata (T. Say, 1826) - (NATICIDAE)
- triseriata, Nepotilla triseriata (J.C. Verco, 1909) - (RAPHITOMIDAE)
- triseriata, Terebra triseriata J.E. Gray, 1834 - syn of: Triplostephanus triseriatus (J.E. Gray, 1834) - (TEREBRIDAE)
- triseriata, Thyasira triseriata Unknown - (THYASIRIDAE)
- triseriatum, Dicroloma triseriatum Parnes, 1981 † - (APORRHAIDAE) (FOSSIL)
- triseriatus, Polinices triseriatus T. Say, 1826 - syn of: Euspira triseriata (T. Say, 1826) - (NATICIDAE)
- triseriatus, Triplostephanus triseriatus (J.E. Gray, 1834) - (TEREBRIDAE)
- triserrata, Kinkaidia triserrata (Batten, 1966 †) - (MICRODOMATIDAE) (FOSSIL)
- trisfragmentum, Ectinochilus trisfragmentum Burger & G.C. Kronenberg, 2006 † - (RIMELLIDAE) (FOSSIL)
- Trishoplita, Genus Trishoplita G.A. von Jacobi, 1898 (BRADYBAENIDAE)
- trisialota, Birasoherpia trisialota L. Salvini-Plawén, 1978 - (SIMROTHIELLIDAE)
- Trisidos, Genus Trisidos P.F. Röding, 1798 (ARCIDAE)
- trisinuata, Bucanopsis trisinuata (Öpik, 1953 †) - (BELLEROPHONTIDAE) (FOSSIL)
- trisinuata, Kokenospira trisinuata Öpik, 1953 † - syn of: Bucanopsis trisinuata (Öpik, 1953 †) - (BUCANIIDAE) (FOSSIL)
- trisinuata, Moellendorffia trisinuata (E.C. Von Martens, 1867) - (CAMAENIDAE)
- trisinuata, Chondrulopsina trisinuata Mukhitdinov, 1976 - syn of: Chondrulopsina fedtschenkoi (C.M.F. Ancey, 1886) - (ENIDAE)
- trisinuata, Lucina trisinuata D'Orbigny, 1853 - syn of: Thyasira trisinuata (A.V.M.D. D'Orbigny, 1853) - (LUCINIDAE)
- trisinuata, Elysia trisinuata K. Baba, 1949 - (PLAKOBRANCHIDAE)
- trisinuata, Thyasira trisinuata (A.V.M.D. D'Orbigny, 1853) - (THYASIRIDAE)
- trisinuata sculptilis, Moellendorffia trisinuata sculptilis (O.F. von Möllendorff, 1884) - (CAMAENIDAE)
- Trisis, syn of: Genus Trisidos P.F. Röding, 1798 (ARCIDAE)
- trismacaria, Terebra trismacaria J.C. Melvill, 1917 - (TEREBRIDAE)
- Trispectes, Genus Trispectes Zhuravleva, 1991 † (ORTHOCERIDA (UNASSIGNED)) (FOSSIL)
- trispina, Melanopsis bouei trispina Pashko, 1968 † - (MELANOPSIDAE) (FOSSIL)
- trispinatus, Pseudothetidites trispinatus Tatzreiter, 1980 † - (THETIDITIDAE) (FOSSIL)
- trispinigera, Pietteia trispinigera J. Szabo, 1983 † - (APORRHAIDAE) (FOSSIL)
- trispinosa, Diacria trispinosa (de Blainville, 1821) - (CAVOLINIIDAE)
- trispinosa, Carenzia trispinosa (R.B. Watson, 1879) - (SEGUENZIIDAE)
- trispinosa heterocolorata, Diacria trispinosa heterocolorata J. Rampal, 2002 - syn of: Diacria trispinosa (de Blainville, 1821) - (CAVOLINIIDAE)
- trispinosa minor, Cavolinia trispinosa minor J.E.V. Boas, 1886 - syn of: Diacria trispinosa (de Blainville, 1821) - (CAVOLINIIDAE)
- trispinosoides, Huastecoceras trispinosoides (Burckhardt, 1925 †) - (ANCYLOCERATIDAE) (FOSSIL)
- trispinosoides, Crioceras trispinosoides Burckhardt, 1925 † - syn of: Huastecoceras trispinosoides (Burckhardt, 1925 †) - (CRIOCERATITIDAE) (FOSSIL)
- trispinosum, Ancyloceras trispinosum A. von Koenen, 1902 † - syn of: Hemihoplites trispinosus (A. von Koenen, 1902 †) - (ANCYLOCERATIDAE) (FOSSIL)
- trispinosus, Hemihoplites trispinosus (A. von Koenen, 1902 †) - (HEMIHOPLITIDAE) (FOSSIL)
- trispinosus, Typhis trispinosus (R. Houart, 1991) - (MURICIDAE)
- trispinosus, Murex trispinosus É.A.A. Locard, 1886 - syn of: Bolinus brandaris (C. Linnaeus, 1758) - (MURICIDAE)
- trispinosus, Hirtotyphis trispinosus R. Houart, 1991 - syn of: Typhis trispinosus (R. Houart, 1991) - (MURICIDAE)
- trispiralis, Lophospira trispiralis J. Donald, 1906 † - (LOPHOSPIRIDAE) (FOSSIL)
- trispiralis, Hydrorissoia trispiralis R.A.M. Brandt, 1968 - (POMATIOPSIDAE)
- trispiralis, Strioterebrum trispiralis N.E. Weisbord, 1962 - syn of: Euterebra angelli (J. Gibson-Smith & W. Gibson-Smith, 1984) - (TEREBRIDAE)
- trispiralis, Euterebra trispiralis N.E. Weisbord, 1962 - syn of: Euterebra angelli (J. Gibson-Smith & W. Gibson-Smith, 1984) - (TEREBRIDAE)
- Trissexodon, Genus Trissexodon H.A. Pilsbry, 1895 (TRISSEXODONTIDAE)
- TRISSEXODONTIDAE H. Nordsieck, 1987 - Family (GASTROPODA-HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-HYGROMIOIDEA [Superfamily])
- tristanense, Argobuccinum proditor tristanense R.K. Dell, 1963 - (RANELLIDAE)
- tristanensis, Eatoniella tristanensis H.W. Worsfold, G.J. Avern & W.F. Ponder, 1993 - (EATONIELLIDAE)
- tristanensis, Marinula tristanensis M. Connolly, 1915 - (ELLOBIIDAE)
- tristanensis, Verticipronus tristanensis T. Soot-Ryen, 1952 - (PHILOBRYIDAE)
- tristanensis, Onoba tristanensis H.W. Worsfold, G.J. Avern & W.F. Ponder, 1993 - (RISSOIDAE)
- tristani, Cyathodonta tristani A.A. Olsson, 1922 † - (THRACIIDAE) (FOSSIL)
- Tristania, syn of: Genus Balea J.E. Gray, 1824 (CLAUSILIIDAE)
- tristantorresi, Potosites tristantorresi Pons & al., 2010 † - (RADIOLITIDAE) (FOSSIL)
- triste, Cardium triste C. Linnaeus, 1758 - syn of: Spisula solida (C. Linnaeus, 1758) - (CARDIIDAE)
- tristensis, Balea tristensis J.E. Gray, 1824 - (CLAUSILIIDAE)
- tristensis, Gradiconus tristensis (E.J. Petuch, 1987) - (CONIDAE)
- tristensis, Muracypraea mus tristensis E.J. Petuch, 1987 - (CYPRAEIDAE)
- tristensis, Siphonaria tristensis (W.E. Leach, 1824) - (SIPHONARIIDAE)
- tristes, Diplomeriza tristes (G.P. Deshayes, 1859 †) - (TEREBRIDAE) (FOSSIL)
- tristica, Pteropurpura tristica W.H. Dall, 1927 - syn of: Timbellus phaneus (W.H. Dall, 1889) - (MURICIDAE)
- tristicha, Compsodrillia tristicha (W.H. Dall, 1889) - (PSEUDOMELATOMIDAE)
- Tristichotrochus, Genus Tristichotrochus Ikebe, 1942 (CALLIOSTOMATIDAE)
- tristichus, Pterochelus tristichus (A.H.E. Beyrich, 1854 †) - (MURICIDAE) (FOSSIL)
- tristichus, Murex tristichus W.H. Dall, 1889 - syn of: Timbellus phaneus (W.H. Dall, 1889) - (MURICIDAE)
- tristiculum, Laevicardium tristiculum Yokoyama, 1924 † - (CARDIIDAE) (FOSSIL)
- tristira, Colpospira tristira (R. Tate, 1885 †) - (TURRITELLIDAE) (FOSSIL)
- tristis, Amastra tristis (A.E.J. Férussac, 1825) - (AMASTRIDAE)
- tristis, Bulimus tristis L. Pfeiffer, 1855 - syn of: Mesembrinus pertristis (H.A. Pilsbry, 1898) - (BULIMULIDAE)
- tristis, Conus tristis L.A. Reeve, 1844 - (CONIDAE)
- tristis, Theobaldius tristis (W.T. Blanford, 1869) - (CYCLOPHORIDAE)
- tristis, Cypraea tristis G.R. Sulliotti, 1924 - syn of: Cypraea tigris C. Linnaeus, 1758 - (CYPRAEIDAE)
- tristis, Dendrodoris tristis L.S.R. Bergh, 1875 - (DENDRODORIDIDAE)
- tristis, Thordisa tristis L.S.R. Bergh, 1905 - (DISCODORIDIDAE)
- tristis, Discodoris tristis L.S.R. Bergh, 1899 - (DISCODORIDIDAE)
- tristis, Atagema tristis (J. Alder & A. Hancock, 1864) - (DISCODORIDIDAE)
- tristis, Doris tristis J. Alder & A. Hancock, 1864 - syn of: Atagema tristis (J. Alder & A. Hancock, 1864) - (DORIDIDAE)
- tristis, Eulima tristis K.H.J. Thiele, 1925 - (EULIMIDAE)
- tristis, Cuthona tristis (E.F. Kelaart, 1858) - (FIONIDAE)
- tristis, Helix tristis (L. Pfeiffer, 1845) - (HELICIDAE)
- tristis, Helix tristis A.E.J. Férussac - syn of: Amastra tristis (A.E.J. Férussac, 1825) - (HELICIDAE)
- tristis, Phrantela daveyensis tristis W.F. Ponder & K.B. Clark, 1993 - (HYDROBIIDAE)
- tristis, Spatha tristis F.P. Jousseaume, 1886 - syn of: Aspatharia rochebrunei (F.P. Jousseaume, 1886) - (IRIDINIDAE)
- tristis, Littorina tristis A. Mousson, 1874 - syn of: Echinolittorina punctata (J.F. Gmelin, 1791) - (LITTORINIDAE)
- tristis, Cyclomactra tristis (L.A. Reeve, 1854) - (MACTRIDAE)
- tristis, Mactra tristis L.A. Reeve, 1854 - syn of: Cyclomactra tristis (L.A. Reeve, 1854) - (MACTRIDAE)
- tristis, Mactra tristis J.E. Gray - syn of: Cyclomactra tristis (L.A. Reeve, 1854) - (MACTRIDAE)
- tristis, Margaritifera tristis P.M.A. Morelet, 1845 - syn of: Margaritifera margaritifera (C. Linnaeus, 1758) - (MARGARITIFERIDAE)
- tristis, Strigatella tristis (W.J. Broderip, 1836) - (MITRIDAE)
- tristis, Purpura tristis R.W. Dunker in R.W. Dunker & J. Zelebor, 1866 - syn of: Haustrum scobina (J.R.C. Quoy & J.P. Gaimard, 1833) - (MURICIDAE)
- tristis, Arcuatula tristis (R.W. Dunker, 1857) - (MYTILIDAE)
- tristis, Modiolus tristis R.W. Dunker, 1857 - syn of: Arcuatula tristis (R.W. Dunker, 1857) - (MYTILIDAE)
- tristis, Nassarius tristis H.B. Preston, 1908 - syn of: Nassarius moestus (R.B. Hinds, 1844) - (NASSARIIDAE)
- tristis, Nerita tristis H.A. Pilsbry, 1901 - (NERITIDAE)
- tristis, Nerita tristis R.A. Philippi - syn of: Theodoxus cariosus (W. Wood, 1828) - (NERITIDAE)
- tristis, Puperita pupa tristis (A.V.M.D. D'Orbigny, 1842) - (NERITIDAE)
- tristis, Oxymelania tristis H.A. Pilsbry & A. Hinkley, 1910 - (PACHYCHILIDAE)
- tristis, Partula tristis D.M. Crampton & C.M. Cooke, 1953 - (PARTULIDAE)
- tristis, Tricolia tristis (H.A. Pilsbry, 1903) - (PHASIANELLIDAE)
- tristis, Limacia tristis L.S.R. Bergh, 1905 - (POLYCERIDAE)
- tristis, Tomichia tristis (P.M.A. Morelet, 1889) - (POMATIOPSIDAE)
- tristis, Psammobia tristis G.P. Deshayes, 1855 - syn of: Gari stangeri (J.E. Gray, 1843) - (PSAMMOBIIDAE)
- tristis, Gari tristis G.P. Deshayes, 1855 - syn of: Gari stangeri (J.E. Gray, 1843) - (PSAMMOBIIDAE)
- tristis, Avicula tristis R.W. Dunker, 1872 - syn of: Pinctada albina (J.B.P.A. Lamarck, 1819) - (PTERIIDAE)
- tristis, Pinctada tristis R.W. Dunker, 1872 - syn of: Pinctada albina (J.B.P.A. Lamarck, 1819) - (PTERIIDAE)
- tristis, Tellina tristis G.P. Deshayes, 1855 - syn of: Tellina deltoidalis J.B.P.A. Lamarck, 1818 - (TELLINIDAE)
- tristis, Euterebra tristis (G.P. Deshayes, 1859) - (TEREBRIDAE)
- tristis, Duplicaria tristis G.P. Deshayes, 1859 - syn of: Euterebra tristis (G.P. Deshayes, 1859) - (TEREBRIDAE)
- tristis, Terebra tristis G.P. Deshayes, 1859 - syn of: Euterebra tristis (G.P. Deshayes, 1859) - (TEREBRIDAE)
- tristis, Lyrodus tristis T. Iredale, 1936 - syn of: Lyrodus pedicellatus (J.L.A. Quatrefages, 1849) - (TEREDINIDAE)
- tristis, Triphora tristis R.B. Hinds, 1843 - (TRIPHORIDAE)
- tristis, Cantharidus tristis K.H.J. Thiele, 1930 - syn of: Jujubinus polychromus (A. Adams, 1853) - (TROCHIDAE)
- tristis, Jujubinus striatus tristis (T.A. de M. Monterosato in Zanardi, 1870) - (TROCHIDAE)
- tristis, Venus tristis J.B.P.A. Lamarck, 1818 - syn of: Marcia japonica (J.F. Gmelin, 1791) - (VENERIDAE)
- tristis crassicostata, Euterebra tristis crassicostata (H.H. Suter, 1909) - (TEREBRIDAE)
- tristoma, Cerithium tristoma H.M.D. de Blainville, 1824 - syn of: Triphora gemmata H.M.D. de Blainville, 1828 - (CERITHIIDAE)
- Tristoma, syn of: Genus Triphora H.M.D. De Blainville, 1828 (TRIPHORIDAE)
- tristomus, Triphora tristomus H.M.D. de Blainville, 1828 - syn of: Triphora gemmata H.M.D. de Blainville, 1828 - (TRIPHORIDAE)
- tristrami, Ampullaria tristrami J.C.H. Crosse & P.H. Fischer, 1890 - syn of: Pomacea flagellata livescens (L.A. Reeve, 1856) - (AMPULLARIIDAE)
- tristrami, Mauritanica tristrami (L. Pfeiffer, 1861) - (CLAUSILIIDAE)
- tristrami, Pachychilus tristrami P.H. Fischer & J.C.H. Crosse, 1892 - syn of: Oxymelania graphium (P.M.A. Morelet, 1849) - (PACHYCHILIDAE)
- tristrami, Unio tristrami É.A.A. Locard, 1883 - syn of: Unio terminalis J.R. Bourguignat, 1852 - (UNIONIDAE)
- tristrami philora, Mauritanica tristrami philora (A. Letourneux, 1887) - (CLAUSILIIDAE)
- Tristramia, Subgenus Helicina (Tristramia) J.C.H. Crosse, 1863 (HELICINIDAE)
- tristriata, Cheilotoma tristriata (Münster, 1841 †) - (MURCHISONIIDAE) (FOSSIL)
- tristriata, Pleurotobembex tristriata (A. Fuchs, 1915 †) - (PORCELLIIDAE) (FOSSIL)
- tristriatus, Aviculopecten tristriatus Renz, 1940 † - (AVICULOPECTINIDAE) (FOSSIL)
- tristriatus, Trochus tristriatus Münster, 1841 † - syn of: Cheilotoma tristriata (Münster, 1841 †) - (TROCHIDAE) (FOSSIL)
- tristrictata, Aclis tristrictata J.E. Tenison-Woods, 1877 - syn of: Cingulina spina (J.C.H. Crosse & P.H. Fischer, 1864) - (ACLIDIDAE)
- trisulcata, Lamellolucina trisulcata D.W. Taylor & E.A. Glover, 2002 - (LUCINIDAE)
- trisulcata, Cavilinga trisulcata (T.A. Conrad, 1841) - (LUCINIDAE)
- trisulcata, Phacoides trisulcata T.A. Conrad, 1841 - syn of: Cavilinga trisulcata (T.A. Conrad, 1841) - (LUCINIDAE)
- trisulcata, Pliconacca trisulcata Martin, 1914 † - (NATICIDAE) (FOSSIL)
- trisulcata, Cingulina trisulcata G.B. III Sowerby, 1894 - (PYRAMIDELLIDAE)
- trisulcata, Salpingoteuthis trisulcata (H.M.D. de Blainville, 1827 †) - (SALPINGOTEUTHIDIDAE) (FOSSIL)
- trisulcata, Turritella trisulcata J.B.P.A. Lamarck, 1822 - (TURRITELLIDAE)
- trisulcata, Acuticosta trisulcata (P.M. Heude, 1883) - (UNIONIDAE)
- trisulcata, Athleta trisulcata (G.P. Deshayes, 1835 †) - (VOLUTIDAE) (FOSSIL)
- trisulcata triangula, Acuticosta trisulcata triangula S. Tchang, K. Li & J.Y. Liu, 1965 - (UNIONIDAE)
- trisulcatum, Solarium trisulcatum F.P. Jousseaume, 1876 - syn of: Architectonica perspectiva (C. Linnaeus, 1767) - (ARCHITECTONICIDAE)
- trisulcatum, Tympanoceras trisulcatum Ruzhentsev, 1958 † - (CRAVENOCERATIDAE) (FOSSIL)
- trisulcatus, Belemnites trisulcatus H.M.D. de Blainville, 1827 - syn of: Salpingoteuthis trisulcata (H.M.D. de Blainville, 1827 †) - (BELEMNITELLIDAE)
- trisulcatus, Cerithiopsis trisulcatus M. Yokoyama, 1922 † - syn of: Seila yokoyamai A.E.M. Cossmann, 1954 † - (CERITHIOPSIDAE) (FOSSIL)
- trisulcatus, Terebralia trisulcatus P. Forsskål, 1775 - syn of: Terebralia palustris (C. Linnaeus, 1767) - (POTAMIDIDAE)
- trisulcatus, Trochus trisulcatus P. Forsskål in C. Niebuhr, 1775 - syn of: Terebralia palustris (C. Linnaeus, 1767) - (TROCHIDAE)
- trita, Vulsella trita L.A. Reeve, 1858 - syn of: Vulsella vulsella (C. Linnaeus, 1758) - (PTERIIDAE)
- tritaeniata, Mangelia tritaeniata J.C. Melvill, 1917 - (MANGELIIDAE)
- Tritaxeopus, Subgenus Octopus (Tritaxeopus) Owen, 1881 (OCTOPODIDAE)
- triteia, Seguenzia triteia R.B. Salvador, D.C. Cavallari & L.R.L. Simone, 2014 - (SEGUENZIIDAE)
- tritensis, Muracypraea tritensis E.J. Petuch, 1987 - syn of: Muracypraea mus tristensis E.J. Petuch, 1987 - (CYPRAEIDAE)
- tritentaculatus, Octopus tritentaculatus A. Risso, 1854 - syn of: Octopus vulgaris G.L.C.F.D. Cuvier, 1797 - (OCTOPODIDAE)
- tritestata, Odostomia tritestata S. Nomura, 1937 - (PYRAMIDELLIDAE)
- Tritia, Genus Tritia Risso, 1826 (NASSARIIDAE) (FOSSIL)
- Tritiaria, Genus Tritiaria Conrad, 1865 † (NASSARIIDAE) (FOSSIL)
- tritica, Rhizorus tritica (A.A. Olsson & A. Harbison, 1953 †) - (RHIZORIDAE) (FOSSIL)
- triticea, Achatinella triticea J.T. Gulick - syn of: Leptachatina oryza L. Pfeiffer, 1856 - (ACHATINELLIDAE)
- triticea, Leptachatina triticea J.T. Gulick, 1856 - (AMASTRIDAE)
- triticea, Cylichna triticea J.P.Y. Couthouy, 1838 - syn of: Cylichna alba (J. Brown, 1827) - (CYLICHNIDAE)
- triticea, Cypraea triticea H.M.D. de Blainville, 1826 - syn of: Cleotrivia antillarum (F.A. Schilder, 1922) - (CYPRAEIDAE)
- triticea, Amphorella triticea (R.T. Lowe, 1831) - (FERUSSACIIDAE)
- triticea, Eucithara triticea (L.C. Kiener, 1840) - (MANGELIIDAE)
- triticea, Eucithara triticea L.A. Reeve, 1843 - syn of: Eucithara angiostoma (W.H. Pease, 1868) - (MANGELIIDAE)
- triticea, Volvarina triticea J.B.P.A. Lamarck, 1822 - syn of: Volvarina exilis (J.F. Gmelin, 1791) - (MARGINELLIDAE)
- triticea, Belloliva triticea (P.L. Duclos, 1835) - (OLIVIDAE)
- triticea, Sandalia triticea (J.B.P.A. Lamarck, 1810) - (OVULIDAE)
- triticea, Ovula triticea H. Fischer, 1927 - syn of: Prosimnia semperi (H.C. Weinkauff, 1881) - (OVULIDAE)
- triticea, Ovula triticea B.C.M. Payraudeau, 1826 - syn of: Simnia spelta (C. Linnaeus, 1758) - (OVULIDAE)
- triticea, Ovula triticea S.I. Da Costa in G.W. Tryon, 1885 - syn of: Pseudosimnia carnea (J.L.M. Poiret, 1789) - (OVULIDAE)
- triticea, Ovula triticea J.B.P.A. Lamarck, 1810 - syn of: Sandalia triticea (J.B.P.A. Lamarck, 1810) - (OVULIDAE)
- triticea, Physella propinqua triticea I. Lea, 1856 - (PHYSIDAE)
- triticea, Rissoina triticea W.H. Pease, 1861 - syn of: Schwartziella triticea (W.H. Pease, 1861) - (RISSOINIDAE)
- triticea, Nanaphora triticea (W.H. Pease, 1861) - (TRIPHORIDAE)
- triticea, Schwartziella triticea (W.H. Pease, 1861) - (ZEBINIDAE)
- triticeus, Melampus triticeus (H.C. Küster, 1844) - (ELLOBIIDAE)
- triticium, Cerithium triticium A.A. Olsson & A. Harbison, 1953 † - (CERITHIIDAE) (FOSSIL)
- triticum, Climocella triticum J.F. Goulstone & P.C. Mayhill, 1998 - (CHAROPIDAE)
- triticum, Trivirostra triticum F.A. Schilder, 1932 - (TRIVIIDAE)
- triticum subinflata, Trivirostra triticum subinflata F.A. Schilder, 1933 - syn of: Trivirostra natalensis F.A. Schilder, 1932 - (TRIVIIDAE)
- triticumtritonis, Cylichnella triticumtritonis C.J. Maury, 1917 † - (CYLICHNIDAE) (FOSSIL)
- triticus, Atys triticus J.B.P.A. Lamarck - (HAMINOEIDAE)
- Tritocurris, syn of: Genus Cymatium P.F. Röding, 1798 (RANELLIDAE)
- Tritogenia, syn of: Genus Tritogonia A.E.R. Agassiz, 1852 (UNIONIDAE)
- Tritogonia, Genus Tritogonia A.E.R. Agassiz, 1852 (UNIONIDAE)
- tritomus, Guraleus tasmantis tritomus C.F. Laseron, 1954 - (MANGELIIDAE)
- triton, Siphonalia triton (R.P. Lesson, 1841) - (BUCCINIDAE)
- triton, Turricaspia triton (K.E.I. von Eichwald, 1838) - (HYDROBIIDAE)
- triton, Pyrgula triton B.M. Logvinenko & Y.I. Starobogatov, 1968 - syn of: Turricaspia martensii (S. Clessin & W. Dybowski in W. Dybowski, 1888) - (HYDROBIIDAE)
- triton, Worthenia triton (A.V.M.D. D'Orbigny, 1849 †) - (LOPHOSPIRIDAE) (FOSSIL)
- Triton, syn of: Genus Charonia J. von Gistel, 1848 (RANELLIDAE)
- triton, Olenikites triton Tozer, 1994 † - (SIBIRITIDAE) (FOSSIL)
- triton, Paludina triton K.E.I. von Eichwald, 1838 - syn of: Turricaspia triton (K.E.I. von Eichwald, 1838) - (VIVIPARIDAE)
- Tritonalia, syn of: Genus Ocenebra J.E. Gray, 1847 (MURICIDAE)
- Tritonatractus, Genus Tritonatractus Cossmann, 1901 † (TURBINELLIDAE) (FOSSIL)
- tritonea, Cymatiella tritonea (J.P.S. Grateloup, 1840 †) - (RANELLIDAE) (FOSSIL)
- Tritonella, syn of: Genus Tritia Risso, 1826 (NASSARIIDAE) (FOSSIL)
- Tritonellium, syn of: Genus Charonia J. von Gistel, 1848 (RANELLIDAE)
- tritonensis, Clithon tritonensis (E.J. Le Guillou, 1841) - (NERITIDAE)
- tritonia, Helicotoma tritonia Billings, 1865 † - (HELICOTOMIDAE) (FOSSIL)
- tritonia, Turbonilla tritonia P. Bartsch, 1915 - (PYRAMIDELLIDAE)
- tritonia, Septa tritonia G. Perry, 1810 - syn of: Charonia tritonis (C. Linnaeus, 1758) - (RANELLIDAE)
- Tritonia, Genus Tritonia G.L.C.F.D. Cuvier, 1798 (TRITONIIDAE)
- Tritonidea, syn of: Genus Pollia J.E. Gray in G.B. Sowerby, 1834 (BUCCINIDAE)
- tritonidea, Cancellaria tritonidea W.M. Gabb, 1866 † - (CANCELLARIIDAE) (FOSSIL)
- tritonidis, Cernuella tritonidis Jus - syn of: Cernuella virgata (E.M. Da Costa, 1778) - (HYGROMIIDAE)
- Tritonidoxa, Genus Tritonidoxa L.S.R. Bergh, 1907 (TRITONIIDAE)
- Tritoniella, Genus Tritoniella C.N.E. Eliot, 1907 (TRITONIIDAE)
- tritoniensis, Naninia tritoniensis (E.J. Le Guillou, 1842) - (ARIOPHANTIDAE)
- tritoniensis, Helix tritoniensis E.J. Le Guillou, 1842 - syn of: Naninia tritoniensis (E.J. Le Guillou, 1842) - (HELICIDAE)
- tritoniformis, Buccinum tritoniformis L.C. Kiener, 1841 - syn of: Nassarius tritoniformis (L.C. Kiener, 1841) - (BUCCINIDAE)
- tritoniformis, Agnewia tritoniformis (H.M.D. de Blainville, 1833) - (MURICIDAE)
- tritoniformis, Nassarius tritoniformis (L.C. Kiener, 1841) - (NASSARIIDAE)
- tritoniformis levidensis, Purpura tritoniformis levidensis H.L. Kesteven, 1902 - syn of: Agnewia tritoniformis (H.M.D. de Blainville, 1833) - (MURICIDAE)
- TRITONIIDAE Lamarck, 1809 - Family (GASTROPODA-HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-NUDIBRANCHIA [Order]-TRITONIOIDEA [Superfamily])
- Tritonimangilia, Genus Tritonimangilia K. Martin, 1914 † (TURRIDAE) (FOSSIL)
- tritonina, Fasciolaria tritonina (J.P.S. Grateloup, 1840 †) - (FASCIOLARIIDAE) (FOSSIL)
- Tritoniopsilla, Genus Tritoniopsilla A. Pruvot-Fol, 1933 (TRITONIIDAE)
- Tritoniopsis, Genus Tritoniopsis C.N.E. Eliot, 1905 (TRITONIIDAE)
- tritonis, Busycon tritonis T.A. Conrad, 1863 † - (BUSYCONIDAE) (FOSSIL)
- tritonis, Cancellaria tritonis G.B. I Sowerby, 1832 - syn of: Sydaphera spengleriana (G.P. Deshayes, 1830) - (CANCELLARIIDAE)
- tritonis, Murex tritonis C. Linnaeus, 1758 - syn of: Charonia tritonis (C. Linnaeus, 1758) - (MURICIDAE)
- tritonis, Charonia tritonis (C. Linnaeus, 1758) - (RANELLIDAE)
- tritonis, Cymbium tritonis (W.J. Broderip, 1830) - (VOLUTIDAE)
- tritonis seguenzae, Charonia tritonis seguenzae A. Aradas & L. Benoit, 1874 - syn of: Charonia variegata seguenzae A. Aradas & L. Benoit, 1874 - (RANELLIDAE)
- tritonis variegata, Charonia tritonis variegata J.B.P.A. Lamarck, 1816 - syn of: Charonia variegata (J.B.P.A. Lamarck, 1816) - (RANELLIDAE)
- Tritoniscus, syn of: Genus Turritriton W.H. Dall, 1904 (RANELLIDAE)
- tritonium, Buccinum tritonium H.M.D. de Blainville, 1826 † - syn of: Tritia pygmaea (J.B.P.A. Lamarck, 1822 †) - (BUCCINIDAE) (FOSSIL)
- Tritonium, syn of: Genus Buccinum C. Linnaeus, 1758 (BUCCINIDAE)
- tritonium, Perrona tritonium H.C.F. Schumacher, 1817 - syn of: Clavatula perronii (L.A. Reeve, 1843) - (CLAVATULIDAE)
- Tritonocauda, syn of: Genus Ranularia H.C.F. Schumacher, 1817 (RANELLIDAE)
- Tritonoceras, Genus Tritonoceras Zhuravleva, 1972 † (DISCOSORIDA (UNASSIGNED)) (FOSSIL)
- Tritonofusus, syn of: Genus Colus P.F. Röding, 1798 (BUCCINIDAE)
- Tritonoharpa, Genus Tritonoharpa W.H. Dall, 1908 (CANCELLARIIDAE)
- tritonoides, Pisania tritonoides (L.A. Reeve, 1846) - (BUCCINIDAE)
- tritonoides, Tritonoturris tritonoides L.A. Reeve, 1843 - syn of: Tritonoturris cumingii (W.L. Powys, 1835) - (RAPHITOMIDAE)
- Tritonomangilia, Genus Tritonomangilia † (NEOGASTROPODA (UNASSIGNED)) (FOSSIL)
- Tritonophon, Genus Tritonophon Öpik , 1953 † (PLECTONOTIDAE) (FOSSIL)
- Tritonopsis, Genus Tritonopsis Conrad, 1865 † (MURICIDAE) (FOSSIL)
- Tritonoranella, syn of: Genus Bursa P.F. Röding, 1798 (BURSIDAE)
- Tritonoturris, Genus Tritonoturris W.H. Dall, 1924 (RAPHITOMIDAE)
- tritonum, Eupaludestrina tritonum (J.R. Bourguignat, 1852) - (COCHLIOPIDAE)
- tritorquis, Taringa tritorquis J.A. Ortea, A.M. Pérez & E.M. Llera, 1982 - (DISCODORIDIDAE)
- tritos, Goniobranchus tritos (N. Yonow, 1994) - (CHROMODORIDIDAE)
- Tritropidoceras, Genus Tritropidoceras Schenk, 1935 † (TROPITIDAE) (FOSSIL)
- Trituba, Genus Trituba F.P. Jousseaume, 1884 (NEWTONIELLIDAE)
- trituberculatum, Neokentroceras trituberculatum Howarth, 1965 † - (BRANCOCERATIDAE) (FOSSIL)
- trituberculatus, Crioceratites trituberculatus Sarkar, 1955 † - syn of: Davouxiceras trituberculatus (Sarkar, 1955 †) - (CRIOCERATITIDAE) (FOSSIL)
- trituberculatus, Davouxiceras trituberculatus (Sarkar, 1955 †) - (EMERICICERATIDAE) (FOSSIL)
- tritubulata, Teredothyra tritubulata C.E. von Moll, 1941 - syn of: Teredothyra excavata (J.G. Jeffreys, 1860) - (TEREDINIDAE)
- triumpha, Ventrilia triumpha A.A. Olsson, 1964 † - (CANCELLARIIDAE) (FOSSIL)
- Triumphala, syn of: Subgenus Jouannetia (Pholadopsis) T.A. Conrad, 1849 (PHOLADIDAE)
- triumphalis, Columbella triumphalis P.L. Duclos, 1843 - syn of: Triumphis distorta (W. Wood, 1828) - (COLUMBELLIDAE)
- triumphans, Trochus triumphans R.A. Philippi, 1841 - syn of: Guildfordia triumphans (R.A. Philippi, 1841) - (TROCHIDAE)
- triumphans, Guildfordia triumphans (R.A. Philippi, 1841) - (TURBINIDAE)
- triumphator, Guildfordia triumphator Martin, 1879 † - (TURBINIDAE) (FOSSIL)
- Triumphis, Genus Triumphis J.E. Gray, 1847 (PSEUDOLIVIDAE)
- triumplinae, Charpentieria clavata triumplinae G. Nardi, 2011 - (CLAUSILIIDAE)
- triundulata, Arca triundulata J.B.G.M. Bory De Saint-Vincent, 1827 - syn of: Arca imbricata J.G. Bruguière, 1789 - (ARCIDAE)
- trivaricata, Kamptoclymenia trivaricata Schindewolf, 1937 † - (PARAWOCKLUMERIIDAE) (FOSSIL)
- trivaricosa, Favartia trivaricosa D'Attilio & B.W. Myers, 1986 - syn of: Favartia tetragona (W.J. Broderip, 1833) - (MURICIDAE)
- trivaricosa, Eucyclotoma trivaricosa (E.C. Von Martens, 1880) - (RAPHITOMIDAE)
- trivaricosus, Dermomurex trivaricosus Houart, Gori & Rosado, 2017 - (MURICIDAE)
- Trivea, syn of: Genus Trivia W.J. Broderip, 1837 (TRIVIIDAE)
- Trivellona, Genus Trivellona T. Iredale, 1931 (TRIVIIDAE)
- Trivettea, Genus Trivettea Bertsch, 2014 (CLADOBRANCHIA (unassigned)) (FOSSIL)
- Trivia, Genus Trivia W.J. Broderip, 1837 (TRIVIIDAE)
- triviale, Cerithium triviale É.A.A. Locard & E. Caziot, 1900 ex Monterosato MS - syn of: Cerithium vulgatum J.G. Bruguière, 1792 - (CERITHIIDAE)
- triviale, Glyptophiceras triviale (Spath, 1935 †) - (KASHMIRITIDAE) (FOSSIL)
- triviale, Meginoceras triviale Tozer, 1994 † - (TRACHYCERATIDAE) (FOSSIL)
- trivialis, Mitrella trivialis K. Monsecour & D. Monsecour, 2016 - (COLUMBELLIDAE)
- trivialis, Mirus trivialis (C.M.F. Ancey, 1888) - (ENIDAE)
- trivialis, Pyrgulopsis trivialis D.W. Taylor, 1987 - (HYDROBIIDAE)
- trivialis, Turricaspia trivialis (B.M. Logvinenko & Y.I. Starobogatov, 1968) - (HYDROBIIDAE)
- trivialis, Diplodon trivialis C.T. Simpson, 1914 - syn of: Rhipidodonta charruana (A.V.M.D. D'Orbigny, 1835) - (HYRIIDAE)
- trivialis, Chicoreus trivialis (A. Adams, 1854) - (MURICIDAE)
- trivialis, Murex trivialis A. Adams, 1854 - syn of: Chicoreus trivialis (A. Adams, 1854) - (MURICIDAE)
- trivialis, Neomenia trivialis L. Salvini-Plawén & I. Paar-Gausch, 2004 - (NEOMENIIDAE)
- trivialis, Nuculopsis trivialis (K.E.I. von Eichwald, 1860 †) - (NUCULIDAE) (FOSSIL)
- trivialis, Polymorphites trivialis C.T. Simpson, 1843 † - (POLYMORPHITIDAE) (FOSSIL)
- trivialis, Solariella trivialis P. Lozouet, 2015 - (SOLARIELLIDAE)
- trivialoides, Diplodon trivialoides W.B. Marshall, 1922 - syn of: Rhipidodonta charruana (A.V.M.D. D'Orbigny, 1835) - (HYRIIDAE)
- Triviella, Genus Triviella F.P. Jousseaume, 1884 (TRIVIIDAE)
- TRIVIIDAE Troschel, 1863 - Family (GASTROPODA-CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-VELUTINOIDEA [Superfamily])
- Trivirostra, Genus Trivirostra F.P. Jousseaume, 1884 (TRIVIIDAE)
- trivitate, Nuculana trivitate † - (NUCULANIDAE) (FOSSIL)
- trivittata, Eucithara trivittata (A. Adams & L.A. Reeve, 1850) - (MANGELIIDAE)
- trivittata, Tritia trivittata (T. Say, 1822 †) - (NASSARIIDAE) (FOSSIL)
- trivittata, Ilyanassa trivittata T. Say, 1822 † - syn of: Tritia trivittata (T. Say, 1822 †) - (NASSARIIDAE) (FOSSIL)
- trivittata, Nassa trivittata T. Say, 1822 † - syn of: Tritia trivittata (T. Say, 1822 †) - (NASSARIIDAE) (FOSSIL)
- trivittata, Syrnola trivittata Sturany, 1903 - (PYRAMIDELLIDAE)
- trivittatoides, Nassarius trivittatoides R.P. Whitfield, 1894 † - (NASSARIIDAE) (FOSSIL)
- trivittatus, Drymaeus trivittatus A. Mousson, 1873 - (BULIMULIDAE)
- trivittatus, Potamides mixtus trivittatus G.P. Deshayes, 1864 † - (POTAMIDIDAE) (FOSSIL)
- trivolis, Helisoma trivolis T. Say - (PLANORBIDAE)
- trivolvis, Planorbella trivolvis (T. Say, 1817) - (PLANORBIDAE)
- trivolvis, Helisoma trivolvis (T. Say, 1817) - syn of: Planorbella trivolvis (T. Say, 1817) - (PLANORBIDAE)
- trivolvis binneyi, Planorbella trivolvis binneyi G.W. Tryon, 1867 - (PLANORBIDAE)
- trivolvis intertextum, Planorbella trivolvis intertextum G.B. Sowerby, 1878 - (PLANORBIDAE)
- trivolvis lentum, Planorbella trivolvis lentum (T. Say, 1817) - (PLANORBIDAE)
- trivolvis randolphi, Planorbella trivolvis randolphi H.B. Baker, 1945 - (PLANORBIDAE)
- trivolvis subcrenatum, Helisoma trivolvis subcrenatum P.P. Carpenter, 1857 - syn of: Helisoma subcrenatum P.P. Carpenter, 1857 - (PLANORBIDAE)
- trivortiana, Melanopsis trivortiana É.A.A. Locard, 1883 † - (MELANOPSIDAE) (FOSSIL)
- Trivrostra, syn of: Genus Trivirostra F.P. Jousseaume, 1884 (TRIVIIDAE)
- trixenostoma, Helix trixenostoma W. Kobelt, 1895 - syn of: Eobania vermiculata (O.F. Müller, 1774) - (HELICIDAE)
- trixiae, Marginella trixiae S.G. Veldsman & S.G. Veldsman, 2013 - (MARGINELLIDAE)
- trizona, Amphidromus metabletus trizona O.F. von Möllendorff, 1901 - (CAMAENIDAE)
- trizona, Campylaea trizona E.A. Rossmässler, 1837 - (HELICIDAE)
- trizona, Leiostracus coxeiranus trizona (S. Moricand, 1836) - (SIMPULOPSIDAE)
- trizona balcanica, Campylaea trizona balcanica W. Kobelt, 1876 - (HELICIDAE)
- trizona boncevi, Campylaea trizona boncevi J. Petrbok, 1940 - (HELICIDAE)
- trizona haberhaueri, Campylaea trizona haberhaueri R. Sturany, 1897 - (HELICIDAE)
- trizona kattingeri, Campylaea trizona kattingeri (H. Knipper, 1939) - (HELICIDAE)
- trizona ljubetenensis, Campylaea trizona ljubetenensis (A.J. Wagner, 1914) - (HELICIDAE)
- trizona olympica, Campylaea trizona olympica (J.R. Roth, 1855) - (HELICIDAE)
- trizona pseudocingulata, Campylaea trizona pseudocingulata (A.J. Wagner, 1914) - (HELICIDAE)
- trizona rumelica, Campylaea trizona rumelica (E.A. Rossmässler, 1838) - (HELICIDAE)
- trizonalis, Cepolis trizonalis (J.P.S. Grateloup) - (CEPOLIDAE)
- trizonalis, Mendax trizonalis (N.H. Odhner, 1924) - (CERITHIOPSIDAE)
- trizonalis, Pusia trizonalis P. Dautzenberg, 1935 - syn of: Pusia speciosum (L.A. Reeve, 1844) - (COSTELLARIIDAE)
- trizonalis odhneri, Mendax trizonalis odhneri (A.W.B. Powell, 1927) - (CERITHIOPSIDAE)
- trizonaloides, Cepolis trizonaloides (A.D. Brown, 1861) - (CEPOLIDAE)
- trizonaloides, Mendax trizonaloides B.A. Marshall, 1978 - (CERITHIOPSIDAE)
- trizonata, Notadusta punctata trizonata (G.B. III Sowerby, 1870) - (CYPRAEIDAE)
- trizonata, Mangelia trizonata E.A. Smith, 1882 - (MANGELIIDAE)
- trizonata, Terebra trizonata E.W. Vredenburg, 1925 † - (TEREBRIDAE) (FOSSIL)
- trizonatum, Mimimitoceras trizonatum W. Korn, 1988 † - (PRIONOCERATIDAE) (FOSSIL)
- trizonella, Cepolis trizonella (H.A. Pilsbry, 1889) - (CEPOLIDAE)
- Trizonoceras, Genus Trizonoceras Girty , 1909 † (DIMORPHOCERATIDAE) (FOSSIL)
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