- tosaense, Homalopoma tosaense T. Habe, 1953 - (COLLONIIDAE)
- tosaense, Epitonium tosaense (M. Azuma, 1962) - (EPITONIIDAE)
- tosaensis, Anadara tosaensis H. Noda, 1965 † - (ARCIDAE) (FOSSIL)
- tosaensis, Gaillea tosaensis (T.A. Okutani & A. Iwahori, 1992) - (BUCCINIDAE)
- tosaensis, Tristichotrochus tosaensis J.T. Kuroda & T. Habe, 1961 - (CALLIOSTOMATIDAE)
- tosaensis, Mirandaphera tosaensis (T. Habe, 1961) - (CANCELLARIIDAE)
- tosaensis, Fusiaphera tosaensis T. Habe, 1961 - syn of: Fusiaphera macrospira (A. Adams & L.A. Reeve, 1850) - (CANCELLARIIDAE)
- tosaensis, Cancellaria tosaensis T. Habe, 1961 - syn of: Fusiaphera macrospira (A. Adams & L.A. Reeve, 1850) - (CANCELLARIIDAE)
- tosaensis, Hyalorisia tosaensis Y. Otuka, 1939 - (CAPULIDAE)
- tosaensis, Oocorys tosaensis T. Habe & M. Azuma, 1959 - syn of: Oocorys verrillii (W.H. Dall, 1889) - (CASSIDAE)
- tosaensis, Tyrannophaedusa tosaensis (H.A. Pilsbry, 1903) - (CLAUSILIIDAE)
- tosaensis, Cocculina tosaensis J.T. Kuroda & T. Habe, 1949 - (COCCULINIDAE)
- tosaensis, Homalopoma tosaensis T. Habe, 1953 - syn of: Homalopoma tosaense T. Habe, 1953 - (COLLONIIDAE)
- tosaensis, Conus tosaensis T. Shikama, 1970 - syn of: Conasprella articulata (G.B. III Sowerby, 1873) - (CONIDAE)
- tosaensis, Cardiomya tosaensis (J.T. Kuroda, 1948) - (CUSPIDARIIDAE)
- tosaensis, Striodentalium tosaensis (T. Habe, 1963) - (DENTALIIDAE)
- tosaensis, Amaea tosaensis (T. Habe & O. Masuda, 1990) - (EPITONIIDAE)
- tosaensis, Fragiliscala tosaensis M. Azuma, 1962 - syn of: Epitonium tosaense (M. Azuma, 1962) - (EPITONIIDAE)
- tosaensis, Amaea tosaensis M. Azuma, 1960 - syn of: Epitonium tosaense (M. Azuma, 1962) - (EPITONIIDAE)
- tosaensis, Pyramidelloides tosaensis (T. Habe, 1961) - (EULIMIDAE)
- tosaensis, Emarginula tosaensis T. Habe, 1953 - (FISSURELLIDAE)
- tosaensis, Monstrotyphis tosaensis (M. Azuma, 1960) - (MURICIDAE)
- tosaensis, Tanea tosaensis (J.T. Kuroda, 1961) - (NATICIDAE)
- tosaensis, Notocochlis tosaensis (J.T. Kuroda, 1961) - syn of: Tanea tosaensis (J.T. Kuroda, 1961) - (NATICIDAE)
- tosaensis, Dissona tosaensis (M. Azuma & C.N. Cate, 1971) - (OVULIDAE)
- tosaensis, Primovula tosaensis M. Azuma & C.N. Cate, 1971 - syn of: Dissona tosaensis (M. Azuma & C.N. Cate, 1971) - (OVULIDAE)
- tosaensis, Costabieta tosaensis T. Habe, 1961 - syn of: Pyramidelloides tosaensis (T. Habe, 1961) - (PYRAMIDELLIDAE)
- tosaensis, Daphnella tosaensis T. Habe, 1962 - (RAPHITOMIDAE)
- tosaensis, Ringicula tosaensis (T. Habe, 1950) - (RINGICULIDAE)
- tosaensis, Ringiculina tosaensis T. Habe, 1950 - syn of: Ringicula tosaensis (T. Habe, 1950) - (RINGICULIDAE)
- tosaensis, Scaphander tosaensis T. Habe, 1954 - (SCAPHANDRIDAE)
- tosaensis, Fulgoraria hamillei tosaensis T. Shikama, 1967 - (VOLUTIDAE)
- tosaensis macrospira, Mirandaphera tosaensis macrospira A. Adams & L.A. Reeve, 1850 - syn of: Fusiaphera macrospira (A. Adams & L.A. Reeve, 1850) - (CANCELLARIIDAE)
- tosaensis macrospiratoides, Mirandaphera tosaensis macrospiratoides T. Habe, 1961 - syn of: Fusiaphera macrospira macrospiratoides (A. Adams & L.A. Reeve, 1850) - (CANCELLARIIDAE)
- tosana, Trishoplita dacostae tosana G.P.L.K. Gude, 1900 - (BRADYBAENIDAE)
- tosana, Siphonalia tosana S. Hirase, 1908 - syn of: Siphonalia cassidariaeformis tosana (S. Hirase, 1908) - (BUCCINIDAE)
- tosana, Tritonidea tosana H.A. Pilsbry, 1904 - syn of: Pollia mollis (A.A. Gould, 1860) - (BUCCINIDAE)
- tosana, Siphonalia cassidariaeformis tosana (S. Hirase, 1908) - (BUCCINIDAE)
- tosana, Pliciphaedusa tosana (H.A. Pilsbry, 1901) - (CLAUSILIIDAE)
- tosana, Corbula scaphoides tosana M. Yokoyama, 1929 - (CORBULIDAE)
- tosana, Diplommatina tosana H.A. Pilsbry & Y. Hirase, 1904 - (DIPLOMMATINIDAE)
- tosana, Limea tosana (K. Oyama, 1943) - (LIMIDAE)
- tosana, Cronia tosana (H.A. Pilsbry, 1904) - (MURICIDAE)
- tosana, Purpura tosana H.A. Pilsbry, 1904 - syn of: Cronia tosana (H.A. Pilsbry, 1904) - (MURICIDAE)
- tosana, Vertigo tosana H.A. Pilsbry, 1919 - syn of: Isthmia japonica (H.A. Pilsbry & Y. Hirase, 1904) - (VERTIGINIDAE)
- tosana goniobasis, Diplommatina tosana goniobasis H.A. Pilsbry & Y. Hirase, 1904 - (DIPLOMMATINIDAE)
- tosana kureana, Diplommatina tosana kureana H.A. Pilsbry & Y. Hirase, 1905 - (DIPLOMMATINIDAE)
- tosana nogawana, Diplommatina tosana nogawana H.A. Pilsbry & Y. Hirase, 1905 - (DIPLOMMATINIDAE)
- tosana onoensis, Diplommatina tosana onoensis H.A. Pilsbry & Y. Hirase, 1904 - (DIPLOMMATINIDAE)
- tosana selenoplicata, Diplommatina tosana selenoplicata J.T. Kuroda & J.M. Abe, 1980 - (DIPLOMMATINIDAE)
- tosanella, Diplommatina tosanella H.A. Pilsbry & Y. Hirase, 1904 - (DIPLOMMATINIDAE)
- tosanella abei, Diplommatina tosanella abei J.T. Kuroda, 1980 - (DIPLOMMATINIDAE)
- tosanus, Nipponochloritis tosanus (H.A. Pilsbry & Y. Hirase, 1903) - (CAMAENIDAE)
- tosanus, Babelomurex tosanus (Y. Hirase, 1908) - (MURICIDAE)
- Tosapecten, Genus Tosapecten Kobayashi & Ichikawa, 1949 † (TOSAPECTINIDAE) (FOSSIL)
- TOSAPECTINIDAE Trushchelev, 1984 † - Family (BIVALVIA-PTERIOMORPHIA [Subclass]-PECTINIDA [Order]-PECTINOIDEA [Superfamily]) (FOSSIL)
- Tosaphaedusa, Subgenus Tyrannophaedusa (Tosaphaedusa) P. Ehrmann, 1929 (CLAUSILIIDAE)
- Tosapusia, Genus Tosapusia M. Azuma, 1965 (COSTELLARIIDAE)
- Tosarca, syn of: Genus Anadara J.E. Gray, 1847 (ARCIDAE)
- tosatoi, Mitrella tosatoi D. Monsecour & D. Monsecour, 2006 - (COLUMBELLIDAE)
- tosatoi, Perotrochus tosatoi P. Anseeuw, Y. Goto & M. Abdi, 2005 - (PLEUROTOMARIIDAE)
- Tosatrochus, Genus Tosatrochus F.S. MacNeil, 1961 (TROCHIDAE)
- toscanensis, Arctonautilus toscanensis E.S. Sobolev, 1989 † - (PROPTYCHITIDAE) (FOSSIL)
- toscaniae, Argna toscaniae C. Pollonera, 1887 - syn of: Argna biplicata (A. Michaud, 1831) - (ARGNIDAE)
- toscari, Chondrina toscari C. Altimira, 1961 - syn of: Chondrina farinesii C. des Moulins, 1835 - (CHONDRINIDAE)
- toscolana, Chondrina megacheilos toscolana R. Schröder, 1913 - (CHONDRINIDAE)
- toshiharui, Calliostoma toshiharui S. Kosuge, 1997 - (CALLIOSTOMATIDAE)
- toshikazui, Eulimella toshikazui S. Hori & H. Fukuda, 1999 - (PYRAMIDELLIDAE)
- toshimana, Japonia toshimana H.A. Pilsbry & Y. Hirase - (CYCLOPHORIDAE)
- toshimana, Syrnola toshimana M. Yokoyama, 1927 - (PYRAMIDELLIDAE)
- toshiyukii, Megalophaedusa toshiyukii H. Minato & T. Habe, 1983 - (CLAUSILIIDAE)
- tosta, Chondrothyra tosta (C. de la Torre & P. Bartsch, 1938) - (POMATIIDAE)
- tosta aurantia, Chondrothyra tosta aurantia C. de la Torre & P. Bartsch, 1938 - (POMATIIDAE)
- tosta hesperia, Chondrothyra tosta hesperia C. de la Torre & P. Bartsch, 1938 - (POMATIIDAE)
- tosta lactea, Chondrothyra tosta lactea C. de la Torre & P. Bartsch, 1938 - (POMATIIDAE)
- tosta pertosta, Chondrothyra tosta pertosta C. de la Torre & P. Bartsch, 1938 - (POMATIIDAE)
- tostesi, Lamniconus tostesi (E.J. Petuch, 1979) - (CONIDAE)
- tostesi, Americoliva circinata tostesi (E.J. Petuch, 1987) - (OLIVIDAE)
- tostus, Tenagodus tostus O.A.L. Mörch, 1861 - (SILIQUARIIDAE)
- totangiensis, Alaginella totangiensis (J. Marwick, 1931 †) - (MARGINELLIDAE) (FOSSIL)
- totangiensis, Jupiteria totangiensis J. Marwick, 1931 † - (NUCULANIDAE) (FOSSIL)
- totangiensis, Nucula totangiensis (J. Marwick, 1931) - (NUCULIDAE)
- totense, Turoceras totense P.A. Zhuravleva † - syn of: Katageioceras rarum P.A. Zhuravleva, 1972 † - (POLYELASMOCERATIDAE) (FOSSIL)
- totevi, Tandonia totevi (A. Wiktor, 1975) - (MILACIDAE)
- tothi bifilosa, Melanopsis tothi bifilosa Š. Brusina, 1903 † - syn of: Microcolpia parreyssii sikorai (Š. Brusina, 1903 †) - (MELANOPSIDAE) (FOSSIL)
- tothi trifilosa, Melanopsis tothi trifilosa Š. Brusina, 1903 † - syn of: Microcolpia parreyssii sikorai (Š. Brusina, 1903 †) - (MELANOPSIDAE) (FOSSIL)
- tothi unifilosa, Melanopsis tothi unifilosa Š. Brusina, 1903 † - syn of: Microcolpia parreyssii sikorai (Š. Brusina, 1903 †) - (MELANOPSIDAE) (FOSSIL)
- totiae, Lipuites totiae (Jeannet, 1959 †) - (TIBETITIDAE) (FOSSIL)
- totiphyllis, Turris totiphyllis B.M. Olivera, 2000 - (TURRIDAE)
- totiumsanctorum, Cerithium totiumsanctorum White, 1885 † - (CERITHIIDAE) (FOSSIL)
- totiumsanctorum, Turritella totiumsanctorum C.J. Maury, 1930 † - (TURRITELLIDAE) (FOSSIL)
- totocostata, Clathrodrillia totocostata B.M. Landau, F. Da Silva & S.M. Heitz, 2016 † - (DRILLIIDAE) (FOSSIL)
- totolirata, Zenepos totolirata (H.H. Suter, 1908) - (RAPHITOMIDAE)
- totomiensis, Cylichna totomiensis J. Makiyama, 1927 - (CYLICHNIDAE)
- totomiensis, Dentimargo totomiensis J. Makiyama, 1927 - (MARGINELLIDAE)
- totomiensis, Kuroshioturris totomiensis (J. Makiyama, 1931) - (TURRIDAE)
- totonacus, Mesembrinus totonacus H. Strebel, 1882 - (BULIMULIDAE)
- totopotens, Lienardia totopotens G. Rosenberg & P. Stahlschmidt, 2011 - (CLATHURELLIDAE)
- Totoralia, Genus Totoralia Tortello & Sabattini, 2011 † (HELCIONELLIDAE) (FOSSIL)
- totostriatus, Pyrunculus totostriatus B.M. Landau, F. Da Silva & S.M. Heitz, 2016 † - (RETUSIDAE) (FOSSIL)
- totschiloensis, Periploma totschiloensis Devjatilova & Volobueva, 1981 † - (PERIPLOMATIDAE) (FOSSIL)
- totschiloensis, Periploma totschiloensis L. Krishtofovich, 1981 † - (PERIPLOMATIDAE) (FOSSIL)
- totschiloensis, Yoldia totschiloensis L. Krishtofovich, 1984 - (YOLDIIDAE)
- totteni, Buccinum totteni W. Stimpson, 1865 - syn of: Buccinum polare J.E. Gray, 1839 - (BUCCINIDAE)
- totteni, Hydrobia totteni J.P.E. Morrison, 1954 - syn of: Ecrobia truncata (E.G. Vanatta, 1924) - (HYDROBIIDAE)
- Totteniana, syn of: Subgenus Helicina (Gemma) A. Wagner, 1905 (HELICINIDAE)
- totteniana, Succinea totteniana I. Lea - (SUCCINEIDAE)
- tottenii, Venus tottenii W. Stimpson, 1860 - syn of: Gemma gemma (J.G. Totten, 1834) - (VENERIDAE)
- toucasi, Ancyloceras toucasi Kilian & Reboul, 1915 † - (ANCYLOCERATIDAE) (FOSSIL)
- toucasi, Uhligella toucasi (Jacob, 1905 †) - (DESMOCERATIDAE) (FOSSIL)
- toucasi, Dalmasiceras toucasi Mazenot † - syn of: Praedalmasiceras spiticeroides (Djanélidzé, 1922 †) - (NEOCOMITIDAE) (FOSSIL)
- Toucasia, Genus Toucasia Munier-Chalmas, 1873 † (REQUIENIIDAE) (FOSSIL)
- Toucasiella, Genus Toucasiella Enay & al., 1998 † (HIMALAYITIDAE) (FOSSIL)
- toucheana, Bithynia toucheana (P.M. Heude, 1890) - (BITHYNIIDAE)
- toucheanus, Bulimus toucheanus P.M. Heude, 1890 - syn of: Bithynia toucheana (P.M. Heude, 1890) - (BULIMULIDAE)
- touhoensis, Belonimorphis touhoensis Cecalupo & Perugia, 2017 - (CERITHIOPSIDAE)
- toulae, Amusium toulae J. Brown & H.A. Pilsbry, 1911 † - (PECTINIDAE) (FOSSIL)
- toulai, Kocaelia toulai (Arthaber, 1914 †) - (BEYRICHITIDAE) (FOSSIL)
- toulai, Massyla toulai B.M. Landau & al., 2012 † - (CANCELLARIIDAE) (FOSSIL)
- toulai, Chama toulai Davidaschvili † - (CHAMIDAE) (FOSSIL)
- toulai, Gymnites toulai Arthaber, 1914 † - (GYMNITIDAE) (FOSSIL)
- toulai, Helix toulai E.I. Kojumdgieva, 1969 † - (HELICIDAE) (FOSSIL)
- toulai, Panopea toulai Lundgren, 1895 - (HIATELLIDAE)
- toulai, Preflorianites toulai (Smith, 1932 †) - (KASHMIRITIDAE) (FOSSIL)
- toulai, Worthenia toulai E.A.L. Kittl, 1891 † - syn of: Wortheniella toulai (E.A.L. Kittl, 1891 †) - (LOPHOSPIRIDAE) (FOSSIL)
- toulai, Xenodiscus toulai Smith, 1932 † - syn of: Preflorianites toulai (Smith, 1932 †) - (MEEKOCERATIDAE) (FOSSIL)
- toulai, Nassarius toulai Hilber, 1879 † - (NASSARIIDAE) (FOSSIL)
- toulai, Nuttallia toulai L.G. Hertlein, 1927 † - (PSAMMOBIIDAE) (FOSSIL)
- toulai, Pseudomonotis toulai C. Gemmellaro, 1896 † - (PSEUDOMONOTIDAE) (FOSSIL)
- toulai, Tainoceras toulai C. Gemmellaro, 1889 † - (TAINOCERATIDAE) (FOSSIL)
- toulai, Tirolites toulai E.A.L. Kittl, 1903 † - syn of: Tirolites cassianus (F.A. von Quenstedt, 1845 †) - (TIROLITIDAE) (FOSSIL)
- toulai, Trochus toulai E.A.L. Kittl, 1891 † - (TROCHIDAE) (FOSSIL)
- toulai, Wortheniella toulai (E.A.L. Kittl, 1891 †) - (WORTHENIELLIDAE) (FOSSIL)
- toulai poelsensis, Nassarius toulai poelsensis M. Auinger † - (NASSARIIDAE) (FOSSIL)
- toulana, Stigmaulax guppiana toulana J. Gardner, 1937 † - (NATICIDAE) (FOSSIL)
- Toulminella, Genus Toulminella Bieler & Dockery III, 2007 † (MATHILDIDAE) (FOSSIL)
- toulonensis, Austroceratites toulonensis F. Riedel, 1916 † - (CERATITIDAE) (FOSSIL)
- toumanskayae, Propinacoceras toumanskayae Leonova, 1989 † - syn of: Propinacoceras asiaticum Toumanskaya, 1949 † - (MEDLICOTTIIDAE) (FOSSIL)
- toumanskayae, Metalegoceras toumanskayae Leonova, 1989 † - (METALEGOCERATIDAE) (FOSSIL)
- toumanskayae, Popanoceras toumanskayae Leonova, 1989 † - (PARAPOPANOCERATIDAE) (FOSSIL)
- toumanskayae, Metaperrinites toumanskayae Leonova, 1983 † - (PERRINITIDAE) (FOSSIL)
- toumanskyae, Stacheoceras toumanskyae Miller & Furnish, 1940 † - (NEOSTACHEOCERATIDAE) (FOSSIL)
- toumeyana, Vanikoropsis toumeyana (F.B. Meek & Hayden, 1856 †) - (VANIKORIDAE) (FOSSIL)
- toupiollei, Murex toupiollei A.C. Bernardi, 1860 - syn of: Chicoreus brevifrons (J.B.P.A. Lamarck, 1822) - (MURICIDAE)
- tourainei, Melanoides tourainei R. Rey, 1974 † - (THIARIDAE) (FOSSIL)
- tourannense, Cerithium tourannense L.F.A. Souleyet, 1852 - syn of: Batillaria sordida (J.F. Gmelin, 1791) - (CERITHIIDAE)
- tourannensis, Acusta tourannensis (L.F.A. Souleyet, 1842) - (BRADYBAENIDAE)
- tourannensis, Neritina tourannensis J.F.T. Eydoux & L.F.A. Souleyet, 1852 - syn of: Neritina violacea (J.F. Gmelin, 1791) - (NERITIDAE)
- tourannensis, Sulcospira tourannensis (L.F.A. Souleyet, 1852) - (PACHYCHILIDAE)
- tourannensis rhodostoma, Acusta tourannensis rhodostoma (O.F. von Möllendorff, 1884) - (BRADYBAENIDAE)
- tourannensis robusta, Acusta tourannensis robusta (O.F. von Möllendorff, 1884) - (BRADYBAENIDAE)
- tournaisense, Conocardium tournaisense R.M. Branson, 1942 † - syn of: Fraipontia tournaisense (R.M. Branson, 1942 †) - (CONOCARDIIDAE) (FOSSIL)
- tournaisense, Fraipontia tournaisense (R.M. Branson, 1942 †) - (HIPPOCARDIIDAE) (FOSSIL)
- tournali, Pecten tournali P.M.T. de Serres, 1829 † - (PECTINIDAE) (FOSSIL)
- tournali neuvillei, Pecten tournali neuvillei A.E.M. Cossmann & M.A. Peyrot, 1921 † - (PECTINIDAE) (FOSSIL)
- tournefortianus, Chondrus tournefortianus A.E.J. Férussac, 1821 - (ENIDAE)
- tournescalis, Pallifera tournescalis R.M. Branson, 1968 - (PHILOMYCIDAE)
- Tournouerella, Genus Tournouerella Kilian, 1887 † (ARCHAEOGASTROPODA (UNASSIGNED)) (FOSSIL)
- tournoueri, Ancilla tournoueri A.E.M. Cossmann, 1919 † - (ANCILLARIIDAE) (FOSSIL)
- tournoueri, Calliostoma tournoueri A.E.M. Cossmann & M.A. Peyrot, 1901 † - (CALLIOSTOMATIDAE) (FOSSIL)
- tournoueri, Sveltia tournoueri M.A. Peyrot, 1928 † - (CANCELLARIIDAE) (FOSSIL)
- tournoueri, Cardita tournoueri C. Mayer, 1871 † - (CARDITIDAE) (FOSSIL)
- tournoueri, Carinaria tournoueri M.A. Peyrot, 1932 - (CARINARIIDAE)
- tournoueri, Cerithium tournoueri C. Mayer, 1878 † - syn of: Tympanotonos tournoueri (C. Mayer, 1878 †) - (CERITHIIDAE) (FOSSIL)
- tournoueri, Lentidium tournoueri C. Mayer, 1864 † - (CORBULIDAE) (FOSSIL)
- tournoueri, Cylichna tournoueri (M.A. Peyrot, 1932 †) - (CYLICHNIDAE) (FOSSIL)
- tournoueri, Acrostemma tournoueri M.A. Peyrot, 1932 † - syn of: Cylichna tournoueri (M.A. Peyrot, 1932 †) - (CYLICHNIDAE) (FOSSIL)
- tournoueri, Helix tournoueri J.C.H. Crosse, 1868 - syn of: Camaena platyodon (L. Pfeiffer, 1861) - (HELICIDAE)
- tournoueri, Prososthenia tournoueri (M. von Neumayr, 1869 †) - (HYDROBIIDAE) (FOSSIL)
- tournoueri, Hydrobia tournoueri C.L.F. von Sandberger, 1875 † - (HYDROBIIDAE) (FOSSIL)
- tournoueri, Littorinopsis tournoueri A.E.M. Cossmann, 1916 † - syn of: Littorina grateloupi G.P. Deshayes, 1843 † - (LITTORINIDAE) (FOSSIL)
- tournoueri, Melanopsis tournoueri P.M. Pallary, 1920 † - (MELANOPSIDAE) (FOSSIL)
- tournoueri, Natica tournoueri Leymerie, 1878 † - (NATICIDAE) (FOSSIL)
- tournoueri, Natica tournoueri A.E.M. Cossmann, 1919 † - syn of: Euspira ilhagwilensis J.M. Pacaud, 2016 † - (NATICIDAE) (FOSSIL)
- tournoueri, Jouannetia tournoueri É.A.A. Locard, 1877 † - (PHOLADIDAE) (FOSSIL)
- tournoueri, Tympanotonos tournoueri (C. Mayer, 1878 †) - (POTAMIDIDAE) (FOSSIL)
- tournoueri, Ringicula tournoueri L.J. Morlet, 1878 † - syn of: Ringicula minor J.P.S. Grateloup, 1838 † - (RINGICULIDAE) (FOSSIL)
- tournoueri, Ringiculella tournoueri L.J. Morlet, 1878 † - syn of: Ringicula minor J.P.S. Grateloup, 1838 † - (RINGICULIDAE) (FOSSIL)
- tournoueri, Roxania tournoueri M.A. Peyrot, 1932 † - syn of: Cylichna tournoueri (M.A. Peyrot, 1932 †) - (SCAPHANDRIDAE) (FOSSIL)
- tournoueri, Siphonaria tournoueri Vasseur, 1881 † - (SIPHONARIIDAE) (FOSSIL)
- tournoueri, Oostrombus tournoueri (J.F. Bayan, 1870 †) - (STROMBIDAE) (FOSSIL)
- tournoueri, Melanoides tournoueri (A. Fuchs, 1877 †) - (THIARIDAE) (FOSSIL)
- tournoueri, Valvata tournoueri G. Capellini, 1880 † - (VALVATIDAE) (FOSSIL)
- tournoueri burdigalica, Littorinopsis tournoueri burdigalica A.E.M. Cossmann, 1916 † - syn of: Littorina grateloupi G.P. Deshayes, 1843 † - (LITTORINIDAE) (FOSSIL)
- tournoueri ferreolensis, Melanoides tournoueri ferreolensis (C.F. Fontannes, 1882 †) - (THIARIDAE) (FOSSIL)
- tournoueri?, Pseudamussium tournoueri? Author unknown † - (PECTINIDAE) (FOSSIL)
- Tournoueria, Subgenus Hydrobia (Tournoueria) Š. Brusina, 1870 (HYDROBIIDAE)
- Tournouerina, Genus Tournouerina Schlickum, 1971 † (HYDROBIIDAE) (FOSSIL)
- tourteloti, Gyrospira tourteloti Boucot, 1956 † - (PTEROTHECIDAE) (FOSSIL)
- tourtiae, Cymatoceras tourtiae (Schluter, 1876 †) - (CYMATOCERATIDAE) (FOSSIL)
- toussaintianus, Obeliscus toussaintianus (H.A. Pilsbry, 1908) - (SUBULINIDAE)
- touzini, Turritella touzini A.E.M. Cossmann & M.A. Peyrot, 1921 † - (TURRITELLIDAE) (FOSSIL)
- touzini merignacensis, Cerithiopsis touzini merignacensis A.E.M. Cossmann & M.A. Peyrot, 1922 † - syn of: Metaxia merignacensis (A.E.M. Cossmann & M.A. Peyrot, 1922 †) - (CERITHIOPSIDAE) (FOSSIL)
- Touzinia, syn of: Genus Gibborissoa A.E.M. Cossmann in F. Sacco, 1899 (LITIOPIDAE)
- tovbinae, Colchidites tovbinae Kakabadze, 1971 † - (ANCYLOCERATIDAE) (FOSSIL)
- tovbinae, Turkmeniceras tovbinae Bogdanova, 1971 † - (DESHAYESITIDAE) (FOSSIL)
- Tovebirkelundites, Genus Tovebirkelundites Cooper, 1994 † (AMMONOIDEA (UNASSIGNED)) (FOSSIL)
- tovilense, Ammonitoceras tovilense Crick, 1917 † - (ANCYLOCERATIDAE) (FOSSIL)
- tovunica, Hauffenia tovunica P. Radoman, 1978 - (HYDROBIIDAE)
- towaensis, Eosturia towaensis Bando & Ehiro, 1982 † - (PTYCHITIDAE) (FOSSIL)
- Towaipecten, Genus Towaipecten Beu, 1995 † (PECTINIDAE) (FOSSIL)
- Towapteria, Genus Towapteria Nakazawa & Newell, 1968 † (BAKEVELLIIDAE) (FOSSIL)
- towncreekensis, Austrocypraea towncreekensis D.T. Dockery, 1977 † - (CYPRAEIDAE) (FOSSIL)
- townleyi, Pojetaconcha townleyi (Pojeta & Gilbert-Tomlinson, 1977 †) - (BRANSONIIDAE) (FOSSIL)
- townsendensis, Eosolen townsendensis Clark 1925 † - (SOLENIDAE) (FOSSIL)
- townsendensis, Elliptotellina townsendensis Clark, 1925 † - (TELLINIDAE) (FOSSIL)
- townsendi, Acteocina townsendi (J.C. Melvill, 1898) - (ACTEOCINIDAE)
- townsendi, Prodotia townsendi (J.C. Melvill, 1918) - (BUCCINIDAE)
- townsendi, Trichotropis townsendi J.C. Melvill & R. Standen, 1901 - (CAPULIDAE)
- townsendi, Zafra townsendi (J.C. Melvill & R. Standen, 1901) - (COLUMBELLIDAE)
- townsendi, Jorunna townsendi C.N.E. Eliot, 1905 - syn of: Jorunna funebris (E.F. Kelaart, 1859) - (DISCODORIDIDAE)
- townsendi, Donax townsendi G.B. III Sowerby, 1894 - (DONACIDAE)
- townsendi, Epitonium townsendi (J.C. Melvill & R. Standen, 1903) - (EPITONIIDAE)
- townsendi, Eulima townsendi (P. Bartsch, 1917) - (EULIMIDAE)
- townsendi, Fusinus townsendi (J.C. Melvill, 1899) - (FASCIOLARIIDAE)
- townsendi, Fissurella townsendi J.C. Melvill, 1897 - syn of: Diodora singaporensis L.A. Reeve, 1850 - (FISSURELLIDAE)
- townsendi, Citharomangelia townsendi (G.B. III Sowerby, 1895) - (MANGELIIDAE)
- townsendi, Nebularia townsendi J.C. Melvill, 1904 - syn of: Nebularia luctuosa A. Adams, 1853 - (MITRIDAE)
- townsendi, Leiosolenus townsendi J.C. Melvill & R. Standen, 1907 - syn of: Leiosolenus tripartitus (F.P. Jousseaume, 1894) - (MYTILIDAE)
- townsendi, Lithophaga townsendi J.C. Melvill & R. Standen, 1907 - syn of: Leiosolenus tripartitus (F.P. Jousseaume, 1894) - (MYTILIDAE)
- townsendi, Bullia townsendi J.C. Melvill, 1912 - (NASSARIIDAE)
- townsendi, Nassarius townsendi (W.H. Dall, 1880) - (NASSARIIDAE)
- townsendi, Nassarius townsendi J.C. Melvill, 1897 - syn of: Nassarius frederici (J.C. Melvill & R. Standen, 1901) - (NASSARIIDAE)
- townsendi, Nucula townsendi (W.H. Dall †) - (NUCULIDAE) (FOSSIL)
- townsendi, Lopha townsendi (C. Linnaeus, 1758) - syn of: Lopha cristagalli (C. Linnaeus, 1758) - (OSTREIDAE)
- townsendi, Ostrea townsendi J.C. Melvill, 1898 - syn of: Lopha cristagalli (C. Linnaeus, 1758) - (OSTREIDAE)
- townsendi, Mimachlamys townsendi (G.B. III Sowerby, 1895) - (PECTINIDAE)
- townsendi, Ashmunella townsendi P. Bartsch, 1904 - (POLYGYRIDAE)
- townsendi, Turbonilla townsendi J.C. Melvill, 1910 - (PYRAMIDELLIDAE)
- townsendi, Alvania townsendi (J.C. Melvill, 1910) - (RISSOIDAE)
- townsendi, Zebinella townsendi (P. Bartsch, 1915) - (RISSOINIDAE)
- townsendi, Rissoina townsendi P. Bartsch, 1915 - syn of: Zebinella townsendi (P. Bartsch, 1915) - (RISSOINIDAE)
- townsendi, Lyrodus townsendi P. Bartsch, 1922 - syn of: Lyrodus pedicellatus (J.L.A. Quatrefages, 1849) - (TEREDINIDAE)
- townsendi, Tonna townsendi R.B. Newton, 1905 † - (TONNIDAE) (FOSSIL)
- townsendi, Enida townsendi G.B. III Sowerby, 1895 - (TROCHIDAE)
- townsendi, Goniapex townsendi (P. Bartsch, 1906) - (UROCOPTIDAE)
- townsendi, Trachycion recticosta townsendi (H.A. Pilsbry & T.D.A. Cockerell, 1903) - (UROCOPTIDAE)
- townsendiana, Allogona townsendiana (H.C. Lea, 1838) - (POLYGYRIDAE)
- townsendianum, Clypeostoma townsendianum (J.C. Melvill & R. Standen, 1903) - (CHILODONTIDAE)
- townsendii, Leptorima townsendii (J.J.F. Whiteaves, 1895 †) - (MURCHISONIIDAE) (FOSSIL)
- townsendii, Pleurotomaria townsendii J.J.F. Whiteaves, 1895 † - syn of: Leptorima townsendii (J.J.F. Whiteaves, 1895 †) - (PLEUROTOMARIIDAE) (FOSSIL)
- towutensis, Corbicula towutensis J.H. Kruimel, 1913 - syn of: Corbicula matannensis P.B. Sarasin & K.F. Sarasin, 1898 - (CYRENIDAE)
- towutensis, Tylomelania towutensis (P.B. Sarasin & K.F. Sarasin, 1897) - (PACHYCHILIDAE)
- towutica, Tylomelania towutica (J.H. Kruimel, 1913) - (PACHYCHILIDAE)
- towutiensis, Sulawesidrobia towutiensis S. Zielske, M. Glaubrecht & M. Haase, 2011 - (HYDROBIIDAE)
- Toxamblyites, Genus Toxamblyites Buckman, 1924 † (HAPLOCERATIDAE) (FOSSIL)
- Toxancyloceras, Genus Toxancyloceras Delanoy, 2003 † (ANCYLOCERATIDAE) (FOSSIL)
- toxeres, Darellia toxeres Buckman † - (AMMONOIDEA (UNASSIGNED)) (FOSSIL)
- Toxeumorphora, Genus Toxeumorphora Shimanskiy, 1963 † (TOXEUMORPHORIDAE) (FOSSIL)
- TOXEUMORPHORIDAE Shimansky, 1962 † - Family (HYOLITHA-TOXEUMORPHORIDA [Order]) (FOSSIL)
- Toxiclionella, Genus Toxiclionella A. Powell, 1966 (CLAVATULIDAE)
- Toxiclonella, syn of: Genus Toxiclionella A. Powell, 1966 (CLAVATULIDAE)
- Toxicochlespira, Genus Toxicochlespira A.V. Sysoev & Y.I. Kantor, 1990 (MANGELIIDAE)
- Toxoceras, Genus Toxoceras d'Orbigny, 1842 † (ANCYLOCERATIDAE) (FOSSIL)
- Toxoceratoides, Genus Toxoceratoides Spath , 1924 † (ANCYLOCERATIDAE) (FOSSIL)
- toxochila, Dimorphosoma toxochila Gardner, 1875 † - (APORRHAIDAE) (FOSSIL)
- Toxoconcha, Subgenus Undularia (Toxoconcha) Stoppani, 1857 † (PROTORCULIDAE) (FOSSIL)
- toxoconicum, Spiroceras toxoconicum S.S. Buckman, 1924 † - (SPIROCERATIDAE) (FOSSIL)
- Toxodactylites, Genus Toxodactylites Buckman, 1926 † (MOLLUSCA INCERTAE SEDIS) (FOSSIL)
- Toxolasma, Genus Toxolasma C.S. Rafinesque, 1831 (UNIONIDAE)
- Toxolimax, Genus Toxolimax H.R. Simroth, 1899 (LIMACIDAE)
- Toxolioceras, syn of: Genus Hyperlioceras Buckman, 1907 † (GRAPHOCERATIDAE) (FOSSIL)
- Toxonema, Subgenus Undularia (Toxonema) Böhm, 1895 † (PROTORCULIDAE) (FOSSIL)
- toxophorum, Dactylioceras toxophorum Buckman, 1926 † - (DACTYLIOCERATIDAE) (FOSSIL)
- toxophorus, Toxodactylites toxophorus Buckman, 1926 † - syn of: Dactylioceras toxophorum Buckman, 1926 † - (MOLLUSCA INCERTAE SEDIS) (FOSSIL)
- toxopleura, Rissoina toxopleura R. Tate, 1893 - (RISSOINIDAE)
- toxopneustesicola, Pelseneeria toxopneustesicola T. Habe, 1989 - (EULIMIDAE)
- toxorhyncha, Cypraea toxorhyncha McCoy, 1876 † - syn of: Zoila platypya (F. McCoy, 1876 †) - (CYPRAEIDAE) (FOSSIL)
- Toxosoma, Genus Toxosoma Conrad, 1874 † (COCHLIOPIDAE) (FOSSIL)
- Toxostoma, syn of: Genus Stenotrema C.S. Rafinesque, 1819 (POLYGYRIDAE)
- Toxotrema, syn of: Genus Stenotrema C.S. Rafinesque, 1819 (POLYGYRIDAE)
- toyamaense, Rhabdus toyamaense (J.T. Kuroda & T. Kikuchi, 1933) - (RHABDIDAE)
- toyamaensis, Asprella toyamaensis K. Tsuda, 1959 † - (CONIDAE) (FOSSIL)
- toyamaensis, Janolus toyamaensis K. Baba & J.M. Abe, 1970 - syn of: Janolus toyamensis K. Baba & J.M. Abe, 1970 - (PROCTONOTIDAE)
- toyamaensis, Retusa toyamaensis (T. Habe, 1955) - (RETUSIDAE)
- toyamaensis, Rimella toyamaensis K. Tsuda, 1959 - syn of: Varicospira toyamaensis (K. Tsuda, 1959 †) - (RIMELLIDAE)
- toyamaensis, Varicospira toyamaensis (K. Tsuda, 1959 †) - (ROSTELLARIIDAE) (FOSSIL)
- toyamaensis, Megayoldia toyamaensis (J.T. Kuroda, 1929) - (YOLDIIDAE)
- toyamana, Retimohnia toyamana (R. Tiba, 1981) - (BUCCINIDAE)
- toyamana, Aplysiopsis toyamana (K. Baba, 1959) - (HERMAEIDAE)
- toyamense, Laevidentalium toyamense (J.T. Kuroda & T. Kikuchi, 1933) - syn of: Rhabdus toyamaense (J.T. Kuroda & T. Kikuchi, 1933) - (LAEVIDENTALIIDAE)
- toyamensis, Janolus toyamensis K. Baba & J.M. Abe, 1970 - (PROCTONOTIDAE)
- toyatani, Turbonilla toyatani J. Henderson & P. Bartsch, 1914 - (PYRAMIDELLIDAE)
- toyenmongaiensis, Bradybaena toyenmongaiensis H. Rolle, 1908 - (BRADYBAENIDAE)
- toyohiwakensis, Divariscintilla toyohiwakensis H. Yamashita, T. Haga & C.F. Lützen, 2011 - (GALEOMMATIDAE)
- toyomensis, Astartella toyomensis Nakazawa & Newell, 1968 † - (ASTARTIDAE) (FOSSIL)
- toyomensis, Mourlonia toyomensis Murata, 1969 † - (GOSSELETINIDAE) (FOSSIL)
- toyonariensis, Odostomia toyonariensis N. Ikebe, 1936 - (PYRAMIDELLIDAE)
- toyoshiomaruae, Parvamussium toyoshiomaruae T.A. Okutani, 2005 - syn of: Parvamussium aldeynzeri H.H. Dijkstra, 2004 - (PROPEAMUSSIIDAE)
- toyuca, Eustreptostyla toyuca (W.H. Dall, 1908) - (SPIRAXIDAE)
- tozeri, Platycuccoceras tozeri Bucher, 1994 † - (BALATONITIDAE) (FOSSIL)
- tozeri, Nicholsites tozeri (Bucher, 1988 †) - (BEYRICHITIDAE) (FOSSIL)
- tozeri, Anagymnotoceras tozeri McLearn, 1969 † - (BEYRICHITIDAE) (FOSSIL)
- tozeri, Nicomedites tozeri Bucher, 1988 † - syn of: Nicholsites tozeri (Bucher, 1988 †) - (BEYRICHITIDAE) (FOSSIL)
- tozeri, Cravenoceras tozeri Nassichuk, 1975 † - (CRAVENOCERATIDAE) (FOSSIL)
- tozeri, Cycloceltites tozeri Taylor & Guex, 2002 † - (CYCLOCELTITIDAE) (FOSSIL)
- tozeri, Danubites tozeri Korchinskaya, 1982 † - (DANUBITIDAE) (FOSSIL)
- tozeri, Gymnites tozeri Bucher, 1992 † - (GYMNITIDAE) (FOSSIL)
- tozeri, Halobia tozeri McRoberts, 2011 † - (HALOBIIDAE) (FOSSIL)
- tozeri, Anagastroplites tozeri Jeletzky, 1980 † - (HOPLITIDAE) (FOSSIL)
- tozeri, Indigirites tozeri (Weitschat & H. Lehmann, 1983 †) - (NATHORSTITIDAE) (FOSSIL)
- tozeri, Nuetzelopsis tozeri Frýda & al., 2003 † - (NERITOPSIDAE) (FOSSIL)
- tozeri, Isculites tozeri Silberling & Nichols, 1982 † - (PARAGOCERATIDAE) (FOSSIL)
- tozeri, Ringnesiceras tozeri Kemper & Jeletzky, 1979 † - (POLYPTYCHITIDAE) (FOSSIL)
- Tozeria, Genus Tozeria Tatzreiter , 1985 † (METASIBIRITIDAE) (FOSSIL)
- Tozericeras, Genus Tozericeras Guex , 1978 † (BYRRANGOCERATIDAE) (FOSSIL)
- Tozerites, Genus Tozerites Silberling & Nichols, 1982 † (SAGECERATIDAE) (FOSSIL)
- Tozzettia, syn of: Subgenus Vitrina (Semilimacella) L. Soós, 1917 (VITRINIDAE)
- Tpigonoides, syn of: Genus Trigonioides Kobayashi & Suzuki, 1936 † (TRIGONIOIDIDAE) (FOSSIL)
- trabalis, Neritina trabalis O.A.L. Mörch, 1852 - syn of: Neritina virginea (C. Linnaeus, 1758) - (NERITIDAE)
- trabalis, Villosa trabalis (T.A. Conrad, 1834) - (UNIONIDAE)
- trabeata, Rissoa trabeata N.E. Weisbord, 1962 † - (RISSOIDAE) (FOSSIL)
- trabeatoides, Michela trabeatoides (G.F. Harris, 1895 †) - (TURRIDAE) (FOSSIL)
- trabeatum, Columbarium trabeatum T. Iredale, 1936 - syn of: Columbarium hedleyi T. Iredale, 1936 - (TURBINELLIDAE)
- trabeatus, Levifusus trabeatus (T.A. Conrad, 1858 †) - (ECHINOFULGURIDAE) (FOSSIL)
- trabeatus, Fusus trabeatus T.A. Conrad, 1858 † - syn of: Levifusus trabeatus (T.A. Conrad, 1858 †) - (FASCIOLARIIDAE) (FOSSIL)
- Trabecula, Subgenus Chrysallida (Trabecula) T.A. de M. Monterosato, 1884 (PYRAMIDELLIDAE)
- Trabeculata, Genus Trabeculata † (PTERIOIDEA (UNASSIGNED)) (FOSSIL)
- Trabeculatia, Genus Trabeculatia Waterhouse, 1979 † (ATOMODESMATIDAE) (FOSSIL)
- trabeculatum, Cirsotrema trabeculatum (A. Adams, 1861) - (EPITONIIDAE)
- trabeculatum, Epitonium trabeculatum A. Adams, 1861 - syn of: Cirsotrema trabeculatum (A. Adams, 1861) - (EPITONIIDAE)
- trabeculum, Trabeculatia trabeculum (C.O. Waterhouse, 1963 †) - (ATOMODESMATIDAE) (FOSSIL)
- trabiformis, Pseudoduvalia trabiformis (Duval-Jouve, 1841 †) - (DUVALIIDAE) (FOSSIL)
- trabzonensis, Liolytopelte trabzonensis A. Wiktor, 1994 - (LIMACIDAE)
- traceyi, Conasprella traceyi (J.K. Tucker & P. Stahlschmidt, 2010) - (CONIDAE)
- traceyi, Pseudoconorbis traceyi J.K. Tucker & P. Stahlschmidt, 2010 - syn of: Conasprella traceyi (J.K. Tucker & P. Stahlschmidt, 2010) - (CONIDAE)
- traceyi, Laddia traceyi (H.S. Ladd, 1965) - (NERITILIIDAE)
- trachea, Caecum trachea (G. Montagu, 1803) - (CAECIDAE)
- trachea, Dentalium trachea G. Montagu, 1803 - syn of: Caecum trachea (G. Montagu, 1803) - (DENTALIIDAE)
- trachea, Trachypollia trachea (J. Gardner, 1944 †) - (MURICIDAE) (FOSSIL)
- trachea, Biwamelania nipponica trachea (C.A. Westerlund, 1883) - (SEMISULCOSPIRIDAE)
- trachea obsoleta, Caecum trachea obsoleta P.P. Carpenter, 1859 - syn of: Caecum trachea (G. Montagu, 1803) - (CAECIDAE)
- trachea taeniata, Caecum trachea taeniata L. de Folin, 1869 - syn of: Caecum taeniatum L. de Folin, 1869 - (CAECIDAE)
- trachea tincta, Caecum trachea tincta L. de Folin, 1869 - syn of: Caecum trachea (G. Montagu, 1803) - (CAECIDAE)
- trachea zonulata, Caecum trachea zonulata L. de Folin, 1869 - syn of: Caecum trachea (G. Montagu, 1803) - (CAECIDAE)
- trachealis, Cingulina trachealis (A.A. Gould, 1861) - (PYRAMIDELLIDAE)
- trachealis, Obtusella trachealis (A.A. Gould, 1861) - (RISSOIDAE)
- tracheatum, Dentalium tracheatum M. Boissevain, 1906 - syn of: Omniglypta cerina (H.A. Pilsbry, 1905) - (DENTALIIDAE)
- tracheaus, Cingulina tracheaus A.A. Gould, 1861 - syn of: Cingulina trachealis (A.A. Gould, 1861) - (PYRAMIDELLIDAE)
- tracheia, Achatina tracheia M. Connolly, 1929 - (ACHATINIDAE)
- tracheia, Ocenebra tracheia W.H. Dall, 1919 - syn of: Ocinebrina interfossa (P.P. Carpenter, 1864) - (MURICIDAE)
- tracheia, Arxellia tracheia C. Vilvens, S.T. Williams & D.G. Herbert, 2014 - (SOLARIELLIDAE)
- tracheia, Gulella tracheia B. Rowson, 2007 - (STREPTAXIDAE)
- Trachelia, syn of: Genus Tetrentodon H.A. Pilsbry, 1903 (UROCOPTIDAE)
- Trachelochetus, Subgenus Clavatula (Trachelochetus) A.E.M. Cossmann, 1889 † (CLAVATULIDAE) (FOSSIL)
- trachelodes, Heterostoma trachelodes K.T. Menke, 1845 - syn of: Heterostoma paupercula (R.T. Lowe, 1831) - (HYGROMIIDAE)
- trachelostropha, Streptodera trachelostropha (O.F. von Möllendorff, 1885) - (CLAUSILIIDAE)
- trachelostropha, Palaina trachelostropha O.F. von Möllendorff, 1890 - (DIPLOMMATINIDAE)
- Tracheloteuthis, syn of: Genus Brachioteuthis A.E. Verrill, 1881 (BRACHIOTEUTHIDAE)
- Trachia, Genus Trachia J.A. Albers, 1860 (CAMAENIDAE)
- trachia, Helix trachia J.R. Bourguignat - syn of: Arianta arbustorum (C. Linnaeus, 1758) - (HELICIDAE)
- trachia, Ocheyoherpia trachia A.H. Scheltema, 1999 - (PHYLLOMENIIDAE)
- trachiformis, Brochus trachiformis T. Brown, 1827 - syn of: Caecum trachea (G. Montagu, 1803) - (CAECIDAE)
- Trachiopsis, Genus Trachiopsis H.A. Pilsbry, 1893 (CAMAENIDAE)
- trachiostraca, Johania trachiostraca R.B. Watson, 1897 - syn of: Philine vestita (R.A. Philippi, 1840) - (PHILINIDAE)
- trachis, Chrysallida trachis (W.H. Dall & P. Bartsch, 1909) - (PYRAMIDELLIDAE)
- trachisma, Alvania trachisma P. Bartsch, 1911 - (RISSOIDAE)
- Trachochiton, syn of: Genus Lepidochitona J.E. Gray, 1821 (LEPIDOCHITONIDAE)
- TRACHOECIDAE Bandel, 1994 † - Family (GASTROPODA-HETEROBRANCHIA [Subclass]-STREPTACIDOIDEA [Superfamily]) (FOSSIL)
- Trachoecus, Genus Trachoecus Kittl, 1894 † (TRACHOECIDAE) (FOSSIL)
- trachus, Trochomorpha trachus J.J. Vermeulen, T.S. Liew & M. Schilthuizen, 2015 - (TROCHOMORPHIDAE)
- Trachybaculites, Genus Trachybaculites Cobban & Kennedy, 1995 † (AMMONOIDEA (UNASSIGNED)) (FOSSIL)
- Trachybaicalia, syn of: Genus Baicalia E.C. Von Martens, 1876 (AMNICOLIDAE)
- Trachybembix, Genus Trachybembix Böhm , 1895 † (STUORELLIDAE) (FOSSIL)
- Trachybembyx, syn of: Genus Trachybembix Böhm , 1895 † (STUORELLIDAE) (FOSSIL)
- Trachycardium, Genus Trachycardium O.A.L. Mörch, 1853 (CARDIIDAE)
- Trachycaspia, Subgenus Turricaspia (Trachycaspia) W. Dybowski & J.G. Grochmalicki, 1917 (HYDROBIIDAE)
- trachyceras, Tainionautilus trachyceras Frech, 1905 † - (TAINOCERATIDAE) (FOSSIL)
- Trachyceras, Genus Trachyceras Mojsisovics, 1882 † (TRACHYCERATIDAE) (FOSSIL)
- TRACHYCERATIDAE Haug, 1894 † - Family (CEPHALOPODA-AMMONOIDEA [Subclass]-CERATITIDA [Order]-TRACHYCERATOIDEA [Superfamily]) (FOSSIL)
- trachychilus, Ditropopsis trachychilus J.J. Vermeulen, T.S. Liew & M. Schilthuizen, 2015 - (CYCLOPHORIDAE)
- Trachychloritis, syn of: Genus Chloritis H.H. Beck, 1837 (CAMAENIDAE)
- Trachycion, Subgenus Anisospira (Trachycion) F.G. Thompson, 1968 (UROCOPTIDAE)
- Trachycystis, Genus Trachycystis H.A. Pilsbry, 1892 (CHAROPIDAE)
- trachyderma, Arcinella trachyderma H.A. Pilsbry & Johnson, 1921 † - (CHAMIDAE) (FOSSIL)
- trachyderma, Chondropoma trachyderma H.A. Pilsbry, 1933 - (POMATIIDAE)
- trachydermon, Thersites trachydermon W.J. Clench & S. Archer, 1938 - syn of: Spurlingia dunkiensis (E. Forbes, 1851) - (CAMAENIDAE)
- trachydermon, Cardiapoda trachydermon J.J. Tesch, 1906 - syn of: Cardiapoda placenta (R.P. Lesson, 1830) - (CARINARIIDAE)
- Trachydermon, syn of: Genus Lepidochitona J.E. Gray, 1821 (LEPIDOCHITONIDAE)
- Trachydolium, syn of: Genus Echinophoria F. Sacco, 1890 (CASSIDAE)
- Trachydoma, syn of: Genus Trachydomia Meek & Worthen, 1866 † (TRACHYSPIRIDAE) (FOSSIL)
- Trachydomia, Genus Trachydomia Meek & Worthen, 1866 † (TRACHYSPIRIDAE) (FOSSIL)
- Trachydrillia, Genus Trachydrillia F. Nolf & F. Swinnen, 2010 (CLAVATULIDAE)
- Trachygenia, Genus Trachygenia Stanisic, 2010 (CAMAENIDAE)
- Trachylytoceras, Subgenus Lytoceras (Trachylytoceras) Meneghini, 1875 † (LYTOCERATIDAE) (FOSSIL)
- Trachynautilus, Genus Trachynautilus Mojsisovics, 1902 † (TAINOCERATIDAE) (FOSSIL)
- Trachynerita, Genus Trachynerita Hoernes, 1856 † (ARCHAEOGASTROPODA (UNASSIGNED)) (FOSSIL)
- Trachyneritaria, Genus Trachyneritaria Bandel , 2007 † (NERITARIIDAE) (FOSSIL)
- trachyneritoides, Seisia trachyneritoides Yin & E.L. Yochelson, 1983 † - (DELPHINULOPSIDAE) (FOSSIL)
- trachynotum, Taramelliceras trachynotum (Oppel, 1862 †) - (OPPELIIDAE) (FOSSIL)
- Trachyochridia, Subgenus Turricaspia (Trachyochridia) W. Polinski, 1932 (HYDROBIIDAE)
- Trachyodon, syn of: Genus Chiton C. Linnaeus, 1758 (CHITONIDAE)
- Trachyoma, syn of: Genus Torellia S.L. Lovén in J.G. Jeffreys, 1867 (CAPULIDAE)
- trachyomphalum, Acanthoceras trachyomphalum Drug, 1883 † - syn of: Spinocrioceras trachyomphalum (Drug, 1883 †) - (ACANTHOCERATIDAE) (FOSSIL)
- trachyomphalum, Spinocrioceras trachyomphalum (Drug, 1883 †) - (CRIOCERATITIDAE) (FOSSIL)
- trachyoptera, Gryphaeostrea trachyoptera White, 1887 † - (GRYPHAEIDAE) (FOSSIL)
- Trachyornites, Genus Trachyornites Wang & Chen, 1979 † (BEYRICHITIDAE) (FOSSIL)
- Trachyorthalicus, Subgenus Sultana (Trachyorthalicus) H. Strebel, 1909 (ORTHALICIDAE)
- trachyostraca, Philine trachyostraca R.B. Watson, 1897 - (PHILINIDAE)
- trachypepla, Trilobopsis trachypepla (S.S. Berry, 1933) - (POLYGYRIDAE)
- Trachyphyllites, syn of: Genus Analytoceras Gümbel, 1861 † (LYTOCERATIDAE) (FOSSIL)
- Trachypleura, Genus Trachypleura Jaekel, 1900 † (NEOLORICATA (UNASSIGNED)) (FOSSIL)
- Trachypleuraspidites, Genus Trachypleuraspidites Diener , 1906 † (DISTICHITIDAE) (FOSSIL)
- Trachypollia, Genus Trachypollia W.P. Woodring, 1928 (MURICIDAE)
- Trachypyrgula, syn of: Genus Macedopyrgula P. Radoman, 1974 (HYDROBIIDAE)
- Trachyradsia, syn of: Genus Lepidochitona J.E. Gray, 1821 (LEPIDOCHITONIDAE)
- trachys, Fusus trachys Seeley † - (FASCIOLARIIDAE) (FOSSIL)
- trachys, Mangelia trachys J.E. Tenison-Woods, 1878 - syn of: Paramontana rufozonata trachys (J.E. Tenison-Woods, 1878) - (MANGELIIDAE)
- trachys, Paramontana rufozonata trachys (J.E. Tenison-Woods, 1878) - (RAPHITOMIDAE)
- Trachysagenites, Genus Trachysagenites Mojsisovics , 1893 † (HALORITIDAE) (FOSSIL)
- Trachyscaphites, Genus Trachyscaphites Cobban & Scott, 1964 † (SCAPHITIDAE) (FOSSIL)
- Trachysma, syn of: Genus Torellia S.L. Lovén in J.G. Jeffreys, 1867 (CAPULIDAE)
- TRACHYSMATIDAE - syn of Family: PENDROMIDAE
- Trachyspira, Genus Trachyspira Gemmellaro , 1889 † (TRACHYSPIRIDAE) (FOSSIL)
- TRACHYSPIRIDAE Nützel & al., 2007 † - Family (GASTROPODA-NERITIMORPHA [Subclass]) (FOSSIL)
- Trachystenoceras, Genus Trachystenoceras Johnston , 1941 † (TRACHYCERATIDAE) (FOSSIL)
- trachystum, Calliostoma trachystum W.H. Dall, 1927 - (CALLIOSTOMATIDAE)
- Trachystyla, Subgenus Calocochlia (Trachystyla) H.A. Pilsbry, 1892 (BRADYBAENIDAE)
- Trachytachea, syn of: Genus Hemicycla W.J. Swainson, 1840 (HELICIDAE)
- TRACHYTEUTHIDIDAE Naef, 1922 † - Family (CEPHALOPODA-COLEOIDEA [Subclass]-DECAPODIFORMES [Superorder]-LOLIGOSEPIIDA [Order]) (FOSSIL)
- Trachyteuthis, Genus Trachyteuthis Meyer, 1846 † (TRACHYTEUTHIDIDAE) (FOSSIL)
- Trachytriton, Genus Trachytriton Meek, 1864 † (RANELLIDAE) (FOSSIL)
- trachyzonus, Amalda trachyzonus R.N. Kilburn, 1975 - (ANCILLARIIDAE)
- tracta, Strophiops tracta C.J. Maynard, 1894 - (CERIONIDAE)
- tracta, Troschelvindex tracta (J. Gundlach in F. Poey, 1858) - (POMATIIDAE)
- tracta, Puposyrnola tracta E. Saurin, 1959 - (PYRAMIDELLIDAE)
- tracta, Psammacoma tracta W.H. Dall, 1900 † - syn of: Psammacoma olivella W.H. Dall, 1900 † - (TELLINIDAE) (FOSSIL)
- Tractabilis, Genus Tractabilis Lyashenko, 1969 † (TENTACULITIDAE) (FOSSIL)
- Tractabilopsis, Genus Tractabilopsis Larsson, 1979 † (TENTACULITIDAE) (FOSSIL)
- Tractolira, Genus Tractolira W.H. Dall, 1896 (VOLUTIDAE)
- Tractoliria, Genus Tractoliria † (NEOGASTROPODA (UNASSIGNED)) (FOSSIL)
- Tradeustoma, Genus Tradeustoma T. Iredale, 1941 (CAMAENIDAE)
- traftoni, Macrocallista traftoni A.A. Olsson, 1942 - (VENERIDAE)
- traftoni, Chionopsis traftoni H.A. Pilsbry & A.A. Olsson, 1941 † - (VENERIDAE) (FOSSIL)
- traftoni, Chione traftoni W.J. Broderip, 1835 - syn of: Chionopsis ornatissima (W.J. Broderip, 1835) - (VENERIDAE)
- Tragatoma, Genus Tragatoma Horný, 1990 † (PLEUROTOMARIOIDEA (UNASSIGNED)) (FOSSIL)
- tragema, Conotrochus tragema J.C. Melvill & R. Standen, 1896 - syn of: Vanitrochus tragema (J.C. Melvill & R. Standen, 1896) - (PLANITROCHIDAE)
- tragema, Solariella tragema J.C. Melvill & R. Standen, 1896 - syn of: Vanitrochus tragema (J.C. Melvill & R. Standen, 1896) - (SOLARIELLIDAE)
- tragema, Vanitrochus tragema (J.C. Melvill & R. Standen, 1896) - (TROCHIDAE)
- tragena, Smaragdia tragena (T. Iredale, 1936) - (NERITIDAE)
- tragica, Clausilia tragica J.T. Kuroda - (CLAUSILIIDAE)
- Tragoceras, Genus Tragoceras Remelé, 1890 † (ESTONIOCERATIDAE) (FOSSIL)
- Tragodesmoceras, Genus Tragodesmoceras Spath , 1922 † (MUNIERICERATIDAE) (FOSSIL)
- Tragodesmoceroides, Genus Tragodesmoceroides Matumoto, 1942 † (DESMOCERATIDAE) (FOSSIL)
- Tragolytoceras, Genus Tragolytoceras Hauer, 1866 † (LYTOCERATIDAE) (FOSSIL)
- Tragomma, syn of: Genus Zonites P.D. Montfort, 1810 (ZONITIDAE)
- Tragophylloceras, Genus Tragophylloceras Howarth & Donovan, 1964 † (JURAPHYLLITIDAE) (FOSSIL)
- Tragorhacoceras, Genus Tragorhacoceras Spath , 1927 † (DISCOPHYLLITIDAE) (FOSSIL)
- Tragula, Subgenus Turbonilla (Tragula) Monterosato, 1884 † (PYRAMIDELLIDAE) (FOSSIL)
- Tragula, syn of: Genus Chrysallida P.P. Carpenter, 1857 (PYRAMIDELLIDAE)
- tragula, Volvulella tragula (C. Hedley, 1903) - (RHIZORIDAE)
- tragulata, Pupa tragulata T. Iredale, 1936 - (ACTEONIDAE)
- tragulata, Electroma tragulata T. Iredale, 1939 - syn of: Electroma alacorvi (L.W. Dillwyn, 1817) - (PTERIIDAE)
- Trahaldia, Genus Trahaldia Pacaud, 2017 ? (COLUMBELLIDAE)
- trahyrae, Cyclodontina trahyrae (S.G.A. Jaeckel, 1950) - (ODONTOSTOMIDAE)
- traiecta, Pyrgulina traiecta Peñas & Rolán, 2017 - (PYRAMIDELLIDAE)
- trailii, Helicostyla trailii (L. Pfeiffer, 1855) - (BRADYBAENIDAE)
- trailii, Cyclotopsis trailii (L. Pfeiffer, 1862) - (POMATIIDAE)
- traillensis, Euryptychites traillensis (E. Donovan, 1953 †) - (POLYPTYCHITIDAE) (FOSSIL)
- trailli, Anabathron trailli (A.W.B. Powell, 1939) - (ANABATHRIDAE)
- trailli, Mesanella monochroa trailli (L. Pfeiffer, 1855) - (BRADYBAENIDAE)
- trailli, Camaena trailli L. Pfeiffer, 1855 - (CAMAENIDAE)
- trailli, Zeadmete trailli (F.W. Hutton, 1873) - (CANCELLARIIDAE)
- trailli, Zeadmete trailli H.H. Suter, 1909 - syn of: Zeadmete subantarctica A.W.B. Powell, 1933 - (CANCELLARIIDAE)
- trailli, Spissatella trailli (F.W. Hutton, 1873 †) - (CRASSATELLIDAE) (FOSSIL)
- trailli, Rhinoclama trailli (F.W. Hutton, 1873) - (CUSPIDARIIDAE)
- trailli, Pleurodistichites trailli (Diener, 1906 †) - (DISTICHITIDAE) (FOSSIL)
- trailli, Cryptospira trailli (L.A. Reeve, 1865) - (MARGINELLIDAE)
- trailli, Volvarina trailli L.A. Reeve, 1865 - syn of: Cryptospira trailli (L.A. Reeve, 1865) - (MARGINELLIDAE)
- trailli, Natica trailli L.A. Reeve, 1855 - syn of: Natica buriasiensis C.A. Récluz, 1844 - (NATICIDAE)
- trailli, Austrohinnites trailli (F.W. Hutton, 1873 †) - (PECTINIDAE) (FOSSIL)
- trailli, Comitas trailli (F.W. Hutton, 1873) - (PSEUDOMELATOMIDAE)
- trailli, Phrixgnathus trailli (H.H. Suter, 1909) - (PUNCTIDAE)
- trailli, Laoma trailli H.H. Suter, 1909 - syn of: Phrixgnathus trailli (H.H. Suter, 1909) - (PUNCTIDAE)
- trailli, Dosinia trailli A. Adams, 1856 - (VENERIDAE)
- trailliana, Fadyenia trailliana E. Chitty, 1857 - (HELICINIDAE)
- traillii, Cerithium traillii Sowerby, 1855 - (CERITHIIDAE)
- traillii, Pygmaeconus traillii (A. Adams, 1855) - (CONIDAE)
- traillii, Conus traillii Hutton, 1873 † - (CONIDAE) (FOSSIL)
- traillii, Modiolus traillii (L.A. Reeve, 1857) - (MYTILIDAE)
- traillii, Crenavolva traillii (A. Adams, 1855) - (OVULIDAE)
- traillii, Crenavolva traillii J.K. Allan, 1956 - syn of: Crenavolva frumentum (G.B. I Sowerby, 1828) - (OVULIDAE)
- traillii, Cyclotopsis traillii L. Pfeiffer, 1862 - syn of: Cyclotopsis trailii (L. Pfeiffer, 1862) - (POMATIIDAE)
- traillii, Hastula traillii G.P. Deshayes, 1859 - syn of: Hastula cuspidata (R.B. Hinds, 1844) - (TEREBRIDAE)
- traillii hesperia, Crenavolva traillii hesperia C.N. Cate, 1973 - syn of: Crenavolva traillii (A. Adams, 1855) - (OVULIDAE)
- traillii kikaiensis, Cerithium traillii kikaiensis H.A. Pilsbry, 1904 - syn of: Cerithium zonatum (W. Wood, 1828) - (CERITHIIDAE)
- traingularis, Cleionychia traingularis Raasch in Shrock & Raasch, 1937 † - (AMBONYCHIIDAE) (FOSSIL)
- Trajana, Genus Trajana J.A. Gardner, 1948 (NASSARIIDAE)
- Trajanella, Genus Trajanella Popovici-Hatzeg, 1899 † (TRAJANELLIDAE) (FOSSIL)
- TRAJANELLIDAE Pchelintsev, 1951 † - Family (GASTROPODA-CAENOGASTROPODA [Subclass]-PSEUDOMELANIOIDEA [Superfamily]) (FOSSIL)
- trajani, Silesites trajani (Tietze, 1872 †) - (SILESITIDAE) (FOSSIL)
- trajectionis, Conus trajectionis C.J. Maury, 1910 † - (CONIDAE) (FOSSIL)
- trajectus, Alvania trajectus R.B. Watson, 1886 - syn of: Alvania novarensis G.R. von Frauenfeld, 1867 - (RISSOIDAE)
- trakanici, Viviparus trakanici Popovic, 1970 † - (VIVIPARIDAE) (FOSSIL)
- tralala, Vallonia patens tralala J. Gerber, 1996 - (VALLONIIDAE)
- Tralia, Genus Tralia J.E. Gray in W.H. Turton, 1840 (ELLOBIIDAE)
- Traliopsis, Genus Traliopsis C.L.F. von Sandberger, 1872 (ELLOBIIDAE)
- tramieri, Pseudominolia tramieri G.T. Poppe, S.P. Tagaro & H. Dekker, 2006 - (TROCHIDAE)
- tramitensis, Barbatia tramitensis Cragin, 1893 † - (ARCIDAE) (FOSSIL)
- tramitensis, Gyrodes tramitensis L.W. Stephenson, 1952 † - (NATICIDAE) (FOSSIL)
- trammeri, Dzikella trammeri A. Kaim, 2004 † - (CAENOGASTROPODA (UNASSIGNED)) (FOSSIL)
- tramoserica, Cellana tramoserica (H.S. Holten, 1802) - (NACELLIDAE)
- trampasensis, Mytilus trampasensis Clark † - (MYTILIDAE) (FOSSIL)
- tramuntanae, Pseudamnicola tramuntanae C.R. Altaba, 2007 - syn of: Pseudamnicola beckmanni P. Glöer & M.L. Zettler, 2007 - (HYDROBIIDAE)
- tranceps, Cyrtodonta tranceps W.J. Raymond, 1916 † - syn of: Cymatonota tranceps W.J. Raymond 1916 † - (CYRTODONTIDAE) (FOSSIL)
- tranceps, Cymatonota tranceps W.J. Raymond 1916 † - (MODIOMORPHIDAE) (FOSSIL)
- trangahyense, Hoplitoplacenticeras trangahyense M. Collignon, 1970 † - syn of: Hoplitoplacenticeras howarthi M. Collignon, 1970 † - (PLACENTICERATIDAE) (FOSSIL)
- tranomarensis, Kalidos tranomarensis E. Fischer-Piette, Ch.P. Blanc & D. Vukadinovic, 1974 - (ARIOPHANTIDAE)
- tranquebarensis, Perna tranquebarensis W.E. Leach, 1815 - syn of: Isognomon isognomum (C. Linnaeus, 1758) - (MYTILIDAE)
- tranquebarensis, Isognomon tranquebarensis W.E. Leach, 1815 - syn of: Isognomon isognomum (C. Linnaeus, 1758) - (PTERIIDAE)
- tranquebaria, Ostrea tranquebaria J.F. Gmelin, 1791 - syn of: Volachlamys tranquebaria (J.F. Gmelin, 1791) - (OSTREIDAE)
- tranquebaria, Volachlamys tranquebaria (J.F. Gmelin, 1791) - (PECTINIDAE)
- tranquebarica, Lottia tranquebarica (J.F. Gmelin, 1791) - (LOTTIIDAE)
- tranquebarica, Bullia tranquebarica (P.F. Röding, 1798) - (NASSARIIDAE)
- tranquebarica, Albula tranquebarica P.F. Röding, 1798 - syn of: Eunaticina papilla (J.F. Gmelin, 1791) - (NATICIDAE)
- tranquebarica, Plotia tranquebarica P.F. Röding, 1798 - syn of: Bullia tranquebarica (P.F. Röding, 1798) - (THIARIDAE)
- tranquebarica, Dosinia tranquebarica E. Fischer-Piette, 1977 - (VENERIDAE)
- tranquebaricum, Calliostoma tranquebaricum (P.F. Röding, 1798) - (CALLIOSTOMATIDAE)
- tranquebaricum, Cymatium tranquebaricum J.B.P.A. Lamarck, 1816 - syn of: Monoplex tranquebaricus J.B.P.A. Lamarck, 1816 - (RANELLIDAE)
- tranquebaricus, Cantharus tranquebaricus (J.F. Gmelin, 1791) - (BUCCINIDAE)
- tranquebaricus, Monoplex tranquebaricus J.B.P.A. Lamarck, 1816 - (RANELLIDAE)
- tranquebaricus, Trochus tranquebaricus P.F. Röding, 1798 - syn of: Calliostoma tranquebaricum (P.F. Röding, 1798) - (TROCHIDAE)
- tranquelleonis, Epiphragmophora tranquelleonis (J.P.S. Grateloup, 1851) - (EPIPHRAGMOPHORIDAE)
- tranquelleonis hidalgonis, Epiphragmophora tranquelleonis hidalgonis (A. Doering, 1875) - (EPIPHRAGMOPHORIDAE)
- tranqueribacus, Charonia tranqueribacus J.B.P.A. Lamarck, 1816 - syn of: Monoplex tranquebaricus J.B.P.A. Lamarck, 1816 - (RANELLIDAE)
- tranquilla, Pleurorima tranquilla J. Perner, 1907 † - (GOSSELETINIDAE) (FOSSIL)
- tranquilla, Mangelia tranquilla K.H. Barnard, 1958 - (MANGELIIDAE)
- tranquilla, Notocochlis tranquilla (J.C. Melvill & R. Standen, 1901) - (NATICIDAE)
- tranquilla, Natica tranquilla (J.C. Melvill & R. Standen, 1901) - syn of: Notocochlis tranquilla (J.C. Melvill & R. Standen, 1901) - (NATICIDAE)
- tranquilla, Nitidavenus tranquilla (G.P. Deshayes, 1857 †) - (VENERIDAE) (FOSSIL)
- trans, Onchidium trans A. Heilprin, 1889 - syn of: Onchidella floridana (W.H. Dall, 1885) - (ONCHIDIIDAE)
- Transafer, syn of: Genus Vitularia W.J. Swainson, 1840 (MURICIDAE)
- transalpina, Cobboldiella transalpina Kerber, 1988 † - (GLOBORILIDAE) (FOSSIL)
- transalpina, Helix transalpina G. Stabile, 1864 - syn of: Chilostoma zonatum (S.E. Studer, 1820) - (HELICIDAE)
- transaperta, Cylindrella transaperta G.B. Sowerby, 1875 - syn of: Urocoptis nobilior C.B. Adams, 1845 - (UROCOPTIDAE)
- transatlantica, Myoconcha transatlantica Burckhardt, 1903 † - (KALENTERIDAE) (FOSSIL)
- transatlantica, Scabrotrigonia transatlantica (Behrendsen 1892) † - (PTEROTRIGONIIDAE) (FOSSIL)
- transatlantica, Striactaeonina transatlantica (Behrendsen, 1891 †) - (TUBIFERIDAE) (FOSSIL)
- transatlanticum, Haploceras transatlanticum Burckhardt, 1906 † - (HAPLOCERATIDAE) (FOSSIL)
- transatlanticum, Onchidium transatlanticum A. Heilprin, 1889 - syn of: Onchidella floridana (W.H. Dall, 1885) - (ONCHIDIIDAE)
- transatlanticum, Onchidella transatlanticum A. Heilprin, 1889 - syn of: Onchidella floridana (W.H. Dall, 1885) - (ONCHIDIIDAE)
- transatlanticus, Pseudotoites transatlanticus (Tornquist, 1898 †) - (OTOITIDAE) (FOSSIL)
- transatlanticus, Stephanoceras transatlanticus Tornquist, 1898 † - syn of: Pseudotoites transatlanticus (Tornquist, 1898 †) - (STEPHANOCERATIDAE) (FOSSIL)
- transbaicalia, Fruticicola transbaicalia A.A. Schileyko, 1978 - (BRADYBAENIDAE)
- transbaicalia sayanica, Fruticicola transbaicalia sayanica (A.G. Kuznetsov, 1997) - (BRADYBAENIDAE)
- transbaicalica, Dahurinaia transbaicalica Klishko, 2008 - syn of: Margaritifera dahurica (A.T. von Middendorff, 1850) - (MARGARITIFERIDAE)
- transbaikalica, Stenotheca transbaikalica Parkhaev, 2004 † - (STENOTHECIDAE) (FOSSIL)
- transcaspia, Helix transcaspia O. Böttger, 1889 - syn of: Euomphalia bactriana (F.W. Hutton, 1849) - (HELICIDAE)
- transcaspia, Euomphalia transcaspia O. Böttger, 1889 - syn of: Euomphalia bactriana (F.W. Hutton, 1849) - (HYGROMIIDAE)
- transcaspia, Lytopelte transcaspia O.W. Von Rosen, 1894 - syn of: Lytopelte maculata (F.C.L. Koch & D.F. Heynemann in E.C. Von Martens, 1874) - (LIMACIDAE)
- transcaspia, Melanopsis transcaspia Z.I. Izzatullaev & Y.I. Starobogatov, 1984 - (MELANOPSIDAE)
- transcaspium, Ammonitoceras transcaspium (Sinzow, 1908 †) - (ANCYLOCERATIDAE) (FOSSIL)
- transcaspius, Crioceras transcaspius Sinzow, 1908 † - syn of: Ammonitoceras transcaspium (Sinzow, 1908 †) - (CRIOCERATITIDAE) (FOSSIL)
- transcaucasica, Stenomphalia ravergieri transcaucasica (A. Mousson, 1876) - (HYGROMIIDAE)
- transcaucasicum, Deroceras transcaucasicum H.R. Simroth, 1901 - syn of: Agriolimax agreste (C. Linnaeus, 1758) - (AGRIOLIMACIDAE)
- transcaucasicus, Agriolimax transcaucasicus H.R. Simroth, 1901 - (AGRIOLIMACIDAE)
- transcaucasicus coeciger, Agriolimax transcaucasicus coeciger H.R. Simroth, 1901 - syn of: Agriolimax agreste (C. Linnaeus, 1758) - (AGRIOLIMACIDAE)
- transcaucasius, Iranites transcaucasius (Shevyrev, 1965 †) - (XENODISCIDAE) (FOSSIL)
- transcedens, Pleurorima migrans transcedens J. Perner, 1907 † - (GOSSELETINIDAE) (FOSSIL)
- transcendens, Acrosterigma transcendens (J.C. Melvill & R. Standen, 1899) - (CARDIIDAE)
- transclathratum, Parvicardium transclathratum J.M.R.M. Viader, 1951 - syn of: Fragum sueziense (A. Issel, 1869) - (CARDIIDAE)
- Transcopia, Genus Transcopia T. Iredale & C.F. Laseron, 1957 (CAECIDAE)
- transcostata, Dictyotomaria transcostata Wang, 1980 † - (GOSSELETINIDAE) (FOSSIL)
- transculpta, Loxoglypta transculpta (G.B. III Sowerby, 1915) - (TELLINIDAE)
- transculpta, Circlotoma transculpta C.F. Laseron, 1958 - (TORNIDAE)
- transcurrens, Laevityphis transcurrens (E.C. Von Martens, 1902) - (MURICIDAE)
- transcurrens, Typhis transcurrens E.C. Von Martens, 1902 - syn of: Laevityphis transcurrens (E.C. Von Martens, 1902) - (MURICIDAE)
- Transefer, syn of: Genus Vitularia W.J. Swainson, 1840 (MURICIDAE)
- Transenella, syn of: Genus Transennella W.H. Dall, 1883 (VENERIDAE)
- transenna, Benthastelena transenna (H.H. Suter, 1917 †) - (CALLIOSTOMATIDAE) (FOSSIL)
- transenna, Tatara transenna (H.H. Suter, 1917 †) - (CANCELLARIIDAE) (FOSSIL)
- transenna, Antephalium transenna (R. Tate, 1889 †) - (CASSIDAE) (FOSSIL)
- transenna, Pseudegestula transenna (H.H. Suter, 1904) - (CHAROPIDAE)
- transenna, Charopa transenna H.H. Suter, 1904 - syn of: Pseudegestula transenna (H.H. Suter, 1904) - (CHAROPIDAE)
- transenna, Cryptomella transenna (H.H. Suter, 1917 †) - (CLATHURELLIDAE) (FOSSIL)
- transenna, Costellaria transenna J.C. Melvill, 1888 - syn of: Vexillum exasperatum (J.F. Gmelin, 1791) - (COSTELLARIIDAE)
- transenna, Cyclochlamys transenna (H.H. Suter, 1913) - (CYCLOCHLAMYDIDAE)
- transenna, Microcolus transenna (J.E. Tenison-Woods, 1876 †) - (FASCIOLARIIDAE) (FOSSIL)
- transenna, Emarginula transenna (Tenison Woods, 1877 †) - (FISSURELLIDAE) (FOSSIL)
- transenna, Limea transenna R. Tate, 1886 † - (LIMIDAE) (FOSSIL)
- transenna, Heterocithara transenna C. Hedley, 1922 - (MANGELIIDAE)
- transenna, Hunkydora transenna H.H. Suter, 1913 - syn of: Hunkydora novozelandica (L.A. Reeve, 1859) - (MYOCHAMIDAE)
- transenna, Pecten transenna H.H. Suter, 1913 - syn of: Cyclochlamys transenna (H.H. Suter, 1913) - (PECTINIDAE)
- transenna, Morea transenna L.W. Stephenson, 1955 † - (PHOLIDOTOMIDAE) (FOSSIL)
- transenna, Onoba transenna (R.B. Watson, 1886) - (RISSOIDAE)
- transenna, Seguenzia transenna B.A. Marshall, 1983 - (SEGUENZIIDAE)
- transenna, Thracia transenna H.H. Suter, 1913 - syn of: Hunkydora novozelandica (L.A. Reeve, 1859) - (THRACIIDAE)
- transenna, Trochus transenna C. Linnaeus, 1758 - (TROCHIDAE)
- transenna, Phanerolepida transenna (R.B. Watson, 1879) - (TURBINIDAE)
- transenne, Bittium transenne J.F. Bayan, 1873 † - (CERITHIIDAE) (FOSSIL)
- Transennella, Genus Transennella W.H. Dall, 1883 (VENERIDAE)
- Transenpitar, Genus Transenpitar E. Fischer-Piette & A.M. Testud, 1967 (VENERIDAE)
- transequatorialis, Plectostoma transequatorialis (J.J. Vermeulen, 1995) - (DIPLOMMATINIDAE)
- transforme, Sholakoceras transforme Ruzhentsev & Shimanskiy, 1954 † - (RHIPHAEOCERATIDAE) (FOSSIL)
- transfuga, Haplotrema transfuga H. Hemphill, 1892 - (HAPLOTREMATIDAE)
- transfuga, Pyrenaearia carascalensis transfuga (P. Fagot, 1885) - (HYGROMIIDAE)
- transfusa, Acritopaphia transfusa T. Iredale, 1936 - syn of: Paphia inflata (G.P. Deshayes, 1853) - (VENERIDAE)
- transgradiens, Gomphoceras transgradiens Barrande, 1865 † - syn of: Ovocerina transgradiens (Barrande, 1865 †) - (DIESTOCERATIDAE) (FOSSIL)
- transgradiens, Ovocerina transgradiens (Barrande, 1865 †) - (MANDALOCERATIDAE) (FOSSIL)
- transgrediens, Sinuitopsis transgrediens J. Perner, 1903 † - syn of: Sinuitopsis neglecta transgrediens J. Perner, 1903 † - (CYRTOLITIDAE) (FOSSIL)
- transgrediens, Sinuitopsis neglecta transgrediens J. Perner, 1903 † - (CYRTOLITIDAE) (FOSSIL)
- transgressor, Ceratites transgressor Wenger, 1957 † - (CERATITIDAE) (FOSSIL)
- transhauricus, Paludomus transhauricus (J.F. Gmelin, 1791) - (PALUDOMIDAE)
- Transhomalogyra, syn of: Genus Adeuomphalus G. Seguenza, 1876 (SEGUENZIOIDEA (UNASSIGNED))
- Transiberus, syn of: Genus Iberus P.D. Montfort, 1810 (HELICIDAE)
- Transicoeloceras, Genus Transicoeloceras Pinna, 1966 † (AMMONOIDEA (UNASSIGNED)) (FOSSIL)
- transiens, Neocardioceras transiens J. Kennedy & al., 1996 † - (ACANTHOCERATIDAE) (FOSSIL)
- transiens, Pleuroceras transiens Frentzen, 1937 † - (AMALTHEIDAE) (FOSSIL)
- transiens, Joleaudella transiens (Reed, 1921 †) - (BELLEROPHONTIDAE) (FOSSIL)
- transiens, Eogymnotoceras transiens Bucher, 1988 † - (CERATITIDAE) (FOSSIL)
- transiens, Chondrina transiens C.A. Westerlund, 1887 - syn of: Chondrina lusitanica (L. Pfeiffer, 1848) - (CHONDRINIDAE)
- transiens, Chondrina transiens S. Clessin, 1887 - syn of: Chondrina avenacea (J.G. Bruguière, 1792) - (CHONDRINIDAE)
- transiens, Macedonica frauenfeldi transiens (O.F. von Möllendorff, 1873) - (CLAUSILIIDAE)
- transiens, Herilla bosniensis transiens H. Nordsieck, 1993 - (CLAUSILIIDAE)
- transiens, Yabeiceras transiens J. Kennedy & Wright, 1983 † - (COLLIGNONICERATIDAE) (FOSSIL)
- transiens, Mitrella transiens L.M.D. Bellardi, 1890 † - (COLUMBELLIDAE) (FOSSIL)
- transiens, Mirus transiens (C.M.F. Ancey, 1888) - (ENIDAE)
- transiens, Murella globularis transiens (K.L. Pfeiffer, 1931) - (HELICIDAE)
- transiens, Cingulifera cingulatum transiens (G.B. Adami, 1886) - (HELICIDAE)
- transiens, Epijuvavites transiens Tozer, 1994 † - (JUVAVITIDAE) (FOSSIL)
- transiens, Leiostyla loweana transiens T.V. Wollaston, 1878 - (LAURIIDAE)
- transiens, Stylonema transiens J. Perner, 1907 † - (LOXONEMATIDAE) (FOSSIL)
- transiens, Pseudobrancoceras transiens J. Kennedy, 2004 † - (LYELLICERATIDAE) (FOSSIL)
- transiens, Velutinopsis transiens Moos, 1944 † - (LYMNAEIDAE) (FOSSIL)
- transiens, Megaphyllites transiens (Mojsisovics, 1873 †) - (MEGAPHYLLITIDAE) (FOSSIL)
- transiens, Melanopsis transiens Blanckenhorn, 1897 † - (MELANOPSIDAE) (FOSSIL)
- transiens, Mitra transiens L.M.D. Bellardi, 1887 † - (MITRIDAE) (FOSSIL)
- transiens, Natica transiens E.A.L. Kittl, 1892 † - (NATICIDAE) (FOSSIL)
- transiens, Orthoceras transiens Barrande, 1866 † - syn of: Pseudocycloceras transiens (Barrande, 1866 †) - (ORTHOCERATIDAE) (FOSSIL)
- transiens, Stenopopanoceras transiens Tozer, 1972 † - (PARAPOPANOCERATIDAE) (FOSSIL)
- transiens, Phormedites transiens Tozer, 1994 † - (PARATHISBITIDAE) (FOSSIL)
- transiens, Pinacoceras transiens Mojsisovics, 1873 † - syn of: Megaphyllites transiens (Mojsisovics, 1873 †) - (PINACOCERATIDAE) (FOSSIL)
- transiens, Pirenella inconstans transiens A.E.M. Cossmann & M.A. Peyrot, 1922 † - (POTAMIDIDAE) (FOSSIL)
- transiens, Mimimitoceras transiens Becker & Zong, 2015 † - (PRIONOCERATIDAE) (FOSSIL)
- transiens, Siogamaia transiens E. Saurin, 1959 - syn of: Siogamaia namensis (J.X. Corgan & J.J. Van Aartsen, 1998) - (PYRAMIDELLIDAE)
- transiens, Charonia tarbelliana transiens Baldi, 1973 † - (RANELLIDAE) (FOSSIL)
- transiens, Pseudocycloceras transiens (Barrande, 1866 †) - (SPYROCERATIDAE) (FOSSIL)
- transiens, Indoceltites transiens Tozer, 1994 † - (THANAMITIDAE) (FOSSIL)
- transiens, Erato transiens Boettger, 1884 - syn of: Hespererato maugeriae (J.E. Gray, 1832) - (TRIVIIDAE)
- transiens, Tornquistites transiens Tozer, 1994 † - (TROPICELTITIDAE) (FOSSIL)
- transiens, Zonidiscus transiens Reed, 1921 † - syn of: Joleaudella transiens (Reed, 1921 †) - (TROPIDODISCIDAE) (FOSSIL)
- transiens, Allaegopis transiens (A. Mousson, 1859) - (ZONITIDAE)
- transiente, Australiceras transiente Whitehouse, 1926 † - (ANCYLOCERATIDAE) (FOSSIL)
- transiformis, Rieberites transiformis Monnet & Bucher, 2005 † - (CERATITIDAE) (FOSSIL)
- transilensis, Cathaica transilensis Y. Tzvetkov, 1940 - (BRADYBAENIDAE)
- transiliensis, Fruticicola transiliensis (Y. Tzvetkov, 1940) - (BRADYBAENIDAE)
- transilis, Volutomitra transilis (Finlay, 1930 †) - (VOLUTOMITRIDAE) (FOSSIL)
- transilvanica, Pseudamnicola transilvanica (Š. Brusina, 1902 †) - (HYDROBIIDAE) (FOSSIL)
- transita, Cyrtoclymenia transita W.K.C. Sun & S. Shen, 1965 † - (CYRTOCLYMENIIDAE) (FOSSIL)
- transita, Platyclymenia transita Kind † - (PLATYCLYMENIIDAE) (FOSSIL)
- transita, Rissoina transita (C.F. Laseron, 1956) - (RISSOINIDAE)
- transitans, Papillifera bidens transitans (M. Paulucci, 1878) - (CLAUSILIIDAE)
- transitans, Paxula transitans (R. Murdoch, 1905) - (COLUMBELLIDAE)
- transitans, Columbella transitans R. Murdoch, 1905 - syn of: Paxula transitans (R. Murdoch, 1905) - (COLUMBELLIDAE)
- transitans, Otala transitans E. Caziot & Thieux, 1911 - syn of: Otala lactea (O.F. Müller, 1774) - (HELICIDAE)
- transitans, Pyrgula transitans (M. von Neumayr, 1875 †) - (HYDROBIIDAE) (FOSSIL)
- transitans, Gyliotrachela transitans W.S.S. Van Benthem-Jutting, 1950 - (HYPSELOSTOMATIDAE)
- transitans, Pseudorhaphitoma transitans C. Hedley, 1922 - (MANGELIIDAE)
- transitans, Melanopsis recurrens transitans Š. Brusina, 1874 † - (MELANOPSIDAE) (FOSSIL)
- transitans, Phrixgnathus transitans (H.H. Suter, 1892) - (PUNCTIDAE)
- transitans, Laoma transitans H.H. Suter, 1892 - syn of: Phrixgnathus transitans (H.H. Suter, 1892) - (PUNCTIDAE)
- transitans, Rissoa transitans F. Nordsieck, 1972 - (RISSOIDAE)
- transitans, Schizopea transitans Ulrich & al., 1931 † - (SINUOPEIDAE) (FOSSIL)
- transitans venusta, Gyliotrachela transitans venusta W.S.S. Van Benthem-Jutting, 1950 - (HYPSELOSTOMATIDAE)
- transitens, Nassarius transitens L.M.D. Bellardi, 1882 † - (NASSARIIDAE) (FOSSIL)
- transitionis, Lecanospira transitionis (Billings, 1865 †) - (OPHILETIDAE) (FOSSIL)
- transitor, Arieticeras transitor Monestier, 1934 † - syn of: Arieticeras macrum Monestier, 1934 † - (HILDOCERATIDAE) (FOSSIL)
- transitoria, Solenosteira transitoria E.J. Petuch, 1994 † - (BUCCINIDAE) (FOSSIL)
- transitoria, Cardita transitoria A.E.M. Cossmann & G. Pissarro † - (CARDITIDAE) (FOSSIL)
- transitoria, Strophiops transitoria C.J. Maynard, 1913 - (CERIONIDAE)
- transitoria, Littoridina transitoria W.A. Biese, 1947 - (COCHLIOPIDAE)
- transitoria, Siphocypraea transitoria A.A. Olsson & R.E. Petit, 1964 † - (CYPRAEIDAE) (FOSSIL)
- transitoria, Cyrtoclymenia transitoria Pajchlowa, 1972 † - (CYRTOCLYMENIIDAE) (FOSSIL)
- transitoria, Pandospira transitoria (C. Gemmellaro, 1889 †) - (GOSSELETINIDAE) (FOSSIL)
- transitoria, Eokosmoclymenia transitoria Czarnocki, 1989 † - (KOSMOCLYMENIIDAE) (FOSSIL)
- transitoria, Crassostrea transitoria (L.H. Hupé, 1854 †) - (OSTREIDAE) (FOSSIL)
- transitoria, Choffatia transitoria Spath, 1931 † - (PERISPHINCTIDAE) (FOSSIL)
- transitoria, Caracolus marginella transitoria (L. Pfeiffer, 1858) - (PLEURODONTIDAE)
- transitoria, Eutudora transitoria (C. de la Torre & P. Bartsch, 1941) - (POMATIIDAE)
- transitoria, Toxoconcha transitoria E.A.L. Kittl, 1894 † - (PROTORCULIDAE) (FOSSIL)
- transitoria, Crisilla transitoria S. Gofas, 1999 - (RISSOIDAE)
- transitoria, Soleniscus transitoria A.W. Grabau, 1931 † - (SOLENISCIDAE) (FOSSIL)
- transitoria, Macrochilina transitoria de Koninck 1881 † - (SOLENISCIDAE) (FOSSIL)
- transitoria, Steinmanella transitoria (Steinmann, 1881 †) - (STEINMANELLIDAE) (FOSSIL)
- transitoria, Temnotropis transitoria C. Gemmellaro, 1889 † - syn of: Pandospira transitoria (C. Gemmellaro, 1889 †) - (TEMNOTROPIDAE) (FOSSIL)
- transitoria, Trigonia transitoria Steinmann, 1881 † - (TRIGONIIDAE) (FOSSIL)
- transitoria, Trilamellaxis transitoria (C. de la Torre, 1911) - (UROCOPTIDAE)
- transitoria distincta, Eutudora transitoria distincta (C. de la Torre & P. Bartsch, 1941) - (POMATIIDAE)
- transitoria roblensis, Eutudora transitoria roblensis C.G. Aguayo & M.L. Jaume, 1954 - (POMATIIDAE)
- transitoria torrei, Eutudora transitoria torrei C.G. Aguayo & M.L. Jaume, 1954 - (POMATIIDAE)
- transitorium, Burroceras transitorium Cobban & al., 1989 † - (ACANTHOCERATIDAE) (FOSSIL)
- transitorium, Ophiceras transitorium (Spath, 1930 †) - (DIENEROCERATIDAE) (FOSSIL)
- transitorium, Buroceras transitorium Cobban, Hook & J. Kennedy, 1989 † - (KOSSMATICERATIDAE) (FOSSIL)
- transitorium, Opisthosiphon berryi transitorium C. de la Torre & J. Henderson, 1921 - (POMATIIDAE)
- transitorium, Opisthosiphon paredonense transitorium C. de la Torre & J. Henderson, 1920 - (POMATIIDAE)
- transitorius, Agoniatites transitorius (B. Phillips, 1841 †) - (AGONIATITIDAE) (FOSSIL)
- transitorius, Ammonites transitorius Oppel, 1868 † - syn of: Pseudoneocomites retowskyi (Sarasin & Schönderlmayer, 1901 †) - (AMMONITIDA (unassigned)) (FOSSIL)
- transitorius, Toxoceratoides transitorius Avram, 2002 † - (ANCYLOCERATIDAE) (FOSSIL)
- transitorius, Paraulacosphinctes transitorius (Oppel, 1865 †) - (ATAXIOCERATIDAE) (FOSSIL)
- transitorius, Barremitites transitorius Avram, 1997 † - (BARREMITIDAE) (FOSSIL)
- transitorius, Cadulus transitorius J. Henderson, 1920 - (GADILIDAE)
- transitorius, Goniatites transitorius B. Phillips, 1841 † - syn of: Agoniatites transitorius (B. Phillips, 1841 †) - (GONIATITIDAE) (FOSSIL)
- transitorius, Lobites transitorius Mojsisovics, 1875 † - (LOBITIDAE) (FOSSIL)
- transitorius, Almites transitorius Leonova, 1992 † - (MARATHONITIDAE) (FOSSIL)
- transitorius, Nautilus transitorius L. Waagen, 1879 † - syn of: Tainionautilus transitorius (L. Waagen, 1879 †) - (NAUTILIDAE) (FOSSIL)
- transitorius, Caracolus transitorius (L. Pfeiffer, 1855) - (PLEURODONTIDAE)
- transitorius, Protofusus transitorius F. Haas, 1953 † - (PURPURINIDAE) (FOSSIL)
- transitorius, Tainionautilus transitorius (L. Waagen, 1879 †) - (TAINOCERATIDAE) (FOSSIL)
- transitorius, Neoptychites transitorius Renz, 1982 † - syn of: Neoptychites cephalotus (Courtiller, 1860 †) - (VASCOCERATIDAE) (FOSSIL)
- transitorius, Viviparus transitorius (Stefanescu, 1889 †) - (VIVIPARIDAE) (FOSSIL)
- transitorius barbadensis, Cadulus transitorius barbadensis J. Henderson, 1920 - syn of: Cadulus transitorius J. Henderson, 1920 - (GADILIDAE)
- transitorsa, Hastula transitorsa J. Marwick, 1929 † - (TEREBRIDAE) (FOSSIL)
- Transitrigonia, Genus Transitrigonia Dietrich, 1933 † (STEINMANELLIDAE) (FOSSIL)
- transitum, Levisoceras transitum Ulrich & al., 1943 † - (ELLESMEROCERATIDAE) (FOSSIL)
- transitus, Abida transitus N. Boubee, 1833 - syn of: Abida pyrenaearia A. Michaud, 1831 - (CHONDRINIDAE)
- transitus, Velesunio transitus T. Iredale, 1943 - syn of: Velesunio ambiguus (R.A. Philippi, 1847) - (HYRIIDAE)
- transitus, Sicradiscus transitus B. Páll-Gergely, 2013 - (PLECTOPYLIDAE)
- Transkeia, Genus Transkeia M. Huber, 2015 (UNGULINIDAE)
- transkeiana, Cypraeovula alfredensis transkeiana F.Jr. Lorenz, 2002 - (CYPRAEIDAE)
- transkeiana, Gregorioiscala transkeiana (R.N. Kilburn, 1985) - (EPITONIIDAE)
- transkeiana, Compressiscala transkeiana R.N. Kilburn, 1985 - syn of: Gregorioiscala transkeiana (R.N. Kilburn, 1985) - (EPITONIIDAE)
- transkeiana, Pteropurpura transkeiana R. Houart, 1991 - (MURICIDAE)
- transkeiensis, Sciteconus pictus transkeiensis W. Korn, 1998 - (CONIDAE)
- transkeiensis, Fusinus transkeiensis R. Hadorn, 2000 - (FASCIOLARIIDAE)
- transkeiensis, Marginella transkeiensis S.G. Veldsman, 2013 - (MARGINELLIDAE)
- transkeiensis, Vaughtia transkeiensis (R. Houart, 1987) - (MURICIDAE)
- translata, Ctenocardia translata (B. Prashad, 1932) - (CARDIIDAE)
- translata, Serrata translata (J.H. Redfield, 1870) - (MARGINELLIDAE)
- translata, Mytilomorpha translata Reed, 1932 † - syn of: Oblicarina translata (Reed, 1932 †) - (MODIOMORPHIDAE) (FOSSIL)
- translata, Oblicarina translata (Reed, 1932 †) - (PACHYDOMIDAE) (FOSSIL)
- translineata, Margovula translineata (C.N. Cate, 1973) - (OVULIDAE)
- translineata, Solemya translineata C.F. Laseron, 1910 - (SOLEMYIDAE)
- translirata, Anachis translirata E. Ravenel, 1861 - syn of: Cotonopsis lafresnayi (Fischer & A.C. Bernardi, 1857) - (COLUMBELLIDAE)
- translirata, Apachella translirata Winters, 1956 † - (GOSSELETINIDAE) (FOSSIL)
- transliratum, Buccinum angulosum transliratum W.H. Dall, 1919 - (BUCCINIDAE)
- transliterata, Anachis transliterata E. Ravenel, 1861 - syn of: Cotonopsis lafresnayi (Fischer & A.C. Bernardi, 1857) - (COLUMBELLIDAE)
- translucens, Hallaxa translucens T.M. Gosliner & S. Johnson, 1994 - (ACTINOCYCLIDAE)
- translucens, Assiminea translucens (P.P. Carpenter, 1864) - (ASSIMINEIDAE)
- translucens, Barleeia translucens E. Rolán & S. Gori, 2014 - (BARLEEIIDAE)
- translucens, Mesembrinus translucens (W.J. Broderip, 1832) - (BULIMULIDAE)
- translucens, Chiton translucens (C. Hedley & A.F.B. Hull, 1909) - (CHITONIDAE)
- translucens, Rhyssoplax translucens C. Hedley & A.F.B. Hull, 1909 - syn of: Chiton translucens (C. Hedley & A.F.B. Hull, 1909) - (CHITONIDAE)
- translucens, Luria translucens J.F. Gmelin, 1791 - syn of: Luria cinerea (J.F. Gmelin, 1791) - (CYPRAEIDAE)
- translucens, Melanella translucens (T.A. de M. Monterosato, 1890) - (EULIMIDAE)
- translucens, Liloa translucens (A. Adams, 1862) - (HAMINOEIDAE)
- translucens, Leucozonella translucens K.K. Uvalieva, 1995 - (HYGROMIIDAE)
- translucens, Ercolania translucens K.R. Jensen, 1993 - (LIMAPONTIIDAE)
- translucens, Mantellina translucens M.G. Harasewych & Tëmkin, 2015 - (LIMIDAE)
- translucens, Leiocithara translucens (K.H. Barnard, 1958) - (MANGELIIDAE)
- translucens, Cerithiella translucens Cecalupo & Perugia, 2017 - (NEWTONIELLIDAE)
- translucens, Delectopecten translucens P. Dautzenberg & A.R.J.B. Bavay, 1912 - syn of: Catillopecten translucens (P. Dautzenberg & A.R.J.B. Bavay, 1912) - (PECTINIDAE)
- translucens, Elysia translucens A. Pruvot-Fol, 1957 - (PLAKOBRANCHIDAE)
- translucens, Fossarus translucens K.H. Barnard, 1958 - (PLANAXIDAE)
- translucens, Catillopecten translucens (P. Dautzenberg & A.R.J.B. Bavay, 1912) - (PROPEAMUSSIIDAE)
- translucens, Odostomia translucens (H. Strebel, 1908) - (PYRAMIDELLIDAE)
- translucens, Hojeda translucens (J. Gundlach in L. Pfeiffer, 1860) - (SAGDIDAE)
- translucens, Xyloskenea translucens (W.H. Dall, 1927) - (SEGUENZIOIDEA (UNASSIGNED))
- translucens, Theora translucens H.B. Preston, 1916 - (SEMELIDAE)
- translucens, Lydiphnis translucens W.H. Dall, 1927 - syn of: Xyloskenea translucens (W.H. Dall, 1927) - (TORNIDAE)
- translucens, Circulus translucens W.H. Dall, 1927 - syn of: Xyloskenea translucens (W.H. Dall, 1927) - (TORNIDAE)
- translucens alternans, Mesembrinus translucens alternans (H.H. Beck, 1837) - (BULIMULIDAE)
- translucens juquilensis, Mesembrinus translucens juquilensis H.A. Pilsbry, 1899 - (BULIMULIDAE)
- translucens misellus, Mesembrinus translucens misellus H.A. Pilsbry, 1926 - (BULIMULIDAE)
- translucens pachecensis, Mesembrinus translucens pachecensis H.A. Pilsbry, 1930 - (BULIMULIDAE)
- translucens panamensis, Mesembrinus translucens panamensis (W.J. Broderip, 1832) - (BULIMULIDAE)
- translucens sororcula, Mesembrinus translucens sororcula H.A. Pilsbry, 1926 - (BULIMULIDAE)
- translucens subfloccosus, Mesembrinus translucens subfloccosus H.A. Pilsbry, 1899 - (BULIMULIDAE)
- translucens tonosiensis, Mesembrinus translucens tonosiensis H.A. Pilsbry, 1930 - (BULIMULIDAE)
- translucida, Typhlodaphne translucida R.B. Watson, 1881 - syn of: Xanthodaphne translucida (R.B. Watson, 1881) - (BORSONIIDAE)
- translucida, Cominella translucida W.H. Turton, 1932 - syn of: Burnupena pubescens (H.C. Küster, 1858) - (BUCCINIDAE)
- translucida, Papuina translucida (J.R.C. Quoy & J.P. Gaimard, 1832) - (CAMAENIDAE)
- translucida, Skenella translucida (W.F. Ponder & E.K. Yoo, 1980) - (CINGULOPSIDAE)
- translucida, Cribrarula translucida J.C. Melvill, 1888 - syn of: Cribrarula esontropia (P.L. Duclos, 1833) - (CYPRAEIDAE)
- translucida, Diala translucida C. Hedley, 1905 - syn of: Styliferina translucida (C. Hedley, 1905) - (DIALIDAE)
- translucida, Cirsotrema translucida (J.H. Gatliff, 1906) - (EPITONIIDAE)
- translucida, Epitonium translucida J.H. Gatliff, 1906 - syn of: Cirsotrema translucida (J.H. Gatliff, 1906) - (EPITONIIDAE)
- translucida, Eulima translucida E.A. Smith, 1901 - (EULIMIDAE)
- translucida, Scintilla translucida (H.B. Preston, 1908) - (GALEOMMATIDAE)
- translucida, Helix translucida J.R.C. Quoy & J.P. Gaimard, 1832 - syn of: Papuina translucida (J.R.C. Quoy & J.P. Gaimard, 1832) - (HELICIDAE)
- translucida, Planikellya translucida (J.B.P.A. Lamarck, 1807 †) - (LASAEIDAE) (FOSSIL)
- translucida, Lauria translucida M. Paulucci, 1882 - syn of: Lauria cylindracea (E.M. Da Costa, 1778) - (LAURIIDAE)
- translucida, Styliferina translucida (C. Hedley, 1905) - (LITIOPIDAE)
- translucida, Austroginella translucida (G.B. II Sowerby, 1846) - (MARGINELLIDAE)
- translucida, Marginella translucida G.B. II Sowerby, 1846 - syn of: Austroginella translucida (G.B. II Sowerby, 1846) - (MARGINELLIDAE)
- translucida, Mesoginella translucida G.B. II Sowerby, 1846 - syn of: Austroginella translucida (G.B. II Sowerby, 1846) - (MARGINELLIDAE)
- translucida, Latiaxis translucida S. Kosuge, 1981 - syn of: Hirtomurex winckworthi (H.C. Fulton, 1930) - (MURICIDAE)
- translucida, Musculus translucida W.M. Gabb, 1881 - syn of: Musculus lateralis (T. Say, 1822) - (MYTILIDAE)
- translucida, Oleacina translucida J. Gundlach in L. Pfeiffer, 1860 - (OLEACINIDAE)
- translucida, Colsyrnola translucida (C.F. Laseron, 1959) - (PYRAMIDELLIDAE)
- translucida, Xanthodaphne translucida (R.B. Watson, 1881) - (RAPHITOMIDAE)
- translucida, Rissoella translucida F. Nordsieck, 1972 - syn of: Rissoella diaphana (J. Alder, 1848) - (RISSOELLIDAE)
- translucida, Setia fusca translucida F. Nordsieck, 1972 - (RISSOIDAE)
- translucida, Cirsonella translucida W.L. May, 1915 - syn of: Acremodontina translucida (W.L. May, 1915) - (SKENEIDAE)
- translucida, Gulella translucida (L. Pfeiffer, 1852) - (STREPTAXIDAE)
- translucida, Apolymetis translucida M. Huber, A. Langleit & K. Kreipl, 2015 - (TELLINIDAE)
- translucida, Acremodontina translucida (W.L. May, 1915) - (TROCHACLIDIDAE)
- translucida, Pleurotoma translucida R.B. Watson, 1881 - syn of: Xanthodaphne translucida (R.B. Watson, 1881) - (TURRIDAE)
- translucida, Colpospira translucida T.A. Garrard, 1972 - (TURRITELLIDAE)
- translucida, Zeradina translucida G.T. Poppe, S.P. Tagaro & P. Stahlschmidt, 2015 - (VANIKORIDAE)
- translucida, Vitreledonella translucida C.W. Robson, 1930 - syn of: Vitreledonella richardi L.M.A.O.E. Joubin, 1918 - (VITRELEDONELLIDAE)
- translucidum, Dentalium translucidum J.C. Chenu, 1843 - syn of: Graptacme semistriata (W. Turton, 1819) - (DENTALIIDAE)
- translucidum, Laevidentalium translucidum (G.P. Deshayes, 1825) - (LAEVIDENTALIIDAE)
- translucidum, Sphaerium translucidum G.B. Sowerby, 1876 - syn of: Pisidium tasmanicum J.E. Tenison-Woods, 1876 - (SPHAERIIDAE)
- translucidum, Dysopeas translucidum (F.C. Baker, 1927) - (SUBULINIDAE)
- translucidum, Notopeplum translucidum (J.C. Verco, 1896) - (VOLUTIDAE)
- translucidus, Drymaeus translucidus W.K. Weyrauch, 1967 - (BULIMULIDAE)
- translucidus, Gaimardia translucidus Cossmann † - (GAIMARDIIDAE) (FOSSIL)
- translucidus, Helix translucidus L.L.G. de Mortillet, 1854 - syn of: Ortizius translucidus (L.L.G. de Mortillet, 1854) - (HELICIDAE)
- translucidus, Nassarius translucidus E.A. Smith, 1895 - syn of: Nassarius subtranslucidus translucidus (E.A. Smith, 1895) - (NASSARIIDAE)
- translucidus, Nassarius subtranslucidus translucidus (E.A. Smith, 1895) - (NASSARIIDAE)
- translucidus, Neocyclotus translucidus (G.B. Sowerby, 1843) - (NEOCYCLOTIDAE)
- translucidus, Ortizius translucidus (L.L.G. de Mortillet, 1854) - (OXYCHILIDAE)
- translucidus trinitensis, Neocyclotus translucidus trinitensis (R.J.L. Guppy, 1864) - (NEOCYCLOTIDAE)
- transmar, Acar transmar L.R.L. Simone, 2009 - (ARCIDAE)
- Transmariaturris, Genus Transmariaturris Petuch, 1993 † (NEOGASTROPODA (UNASSIGNED)) (FOSSIL)
- transmontana, Armenica euprepes transmontana E. Neubert & H.P.M.G. Menkhorst, 1994 - (CLAUSILIIDAE)
- transmontana, Myadoropsis transmontana (M. Yokoyama, 1922) - (MYOCHAMIDAE)
- transmutans, Stephanocosmia transmutans E.A.L. Kittl, 1899 † - (LOXONEMATIDAE) (FOSSIL)
- transmutata, Strophiops transmutata C.J. Maynard & W.F. Clapp, 1921 - (CERIONIDAE)
- Transomalogyra, syn of: Genus Adeuomphalus G. Seguenza, 1876 (SEGUENZIOIDEA (UNASSIGNED))
- Transorthoceras, Genus Transorthoceras Kröger & al., 2011 † (PROTEOCERATIDAE) (FOSSIL)
- Transovula, Genus Transovula De Gregorio, 1880 † (OVULIDAE) (FOSSIL)
- transovuloides, Oxycypraea transovuloides (Schilder 1924 †) - (EOCYPRAEIDAE) (FOSSIL)
- transpacificum, Globacrochordiceras transpacificum Monnet & al., 2013 † - (ACROCHORDICERATIDAE) (FOSSIL)
- transparens, Bulimulus transparens L.A. Reeve, 1849 - (BULIMULIDAE)
- transparens, Modiolus transparens L. Waagen, 1881 † - (MYTILIDAE) (FOSSIL)
- transparens, Ephippium transparens P.F. Röding, 1798 - syn of: Placuna placenta (C. Linnaeus, 1758) - (PLACUNIDAE)
- transparens, Placuna transparens P.F. Röding, 1798 - syn of: Placuna placenta (C. Linnaeus, 1758) - (PLACUNIDAE)
- transparens, Urocoptis transparens (L. Pfeiffer) - (UROCOPTIDAE)
- Transpharciceras, Genus Transpharciceras Bockwinkel, Becker & Ebbighausen, 2013 † (PHARCICERATIDAE) (FOSSIL)
- transpiciens, Talostolida transpiciens J.W. Taylor, 1916 - syn of: Talostolida teres (J.F. Gmelin, 1791) - (CYPRAEIDAE)
- transplicata, Anomalocoelia transplicata Isberg, 1934 † - (AMBONYCHIIDAE) (FOSSIL)
- transplicata, Amphicoelia transplicata Isberg, 1934 † - (AMBONYCHIIDAE) (FOSSIL)
- transpositum, Vexillum sanguisugum transpositum (P. Dautzenberg & J.L. Bouge, 1923) - (COSTELLARIIDAE)
- transsilvanica, Codiella transsilvanica E.A. Bielz, 1853 - syn of: Bithynia troscheli (A. Paasch, 1842) - (BITHYNIIDAE)
- Transsilvanica, syn of: Genus Alopia H. Adams & A. Adams, 1855 (CLAUSILIIDAE)
- transsilvanica, Lozekia transsilvanica C.A. Westerlund, 1876 - syn of: Lozekia transsylvanica (C.A. Westerlund, 1876) - (HYGROMIIDAE)
- transsilvanica, Acella transsilvanica (Roth, 1881 †) - (LYMNAEIDAE) (FOSSIL)
- transsilvanica, Daudebardia transsilvanica E.A. Bielz, 1859 - syn of: Cibinia transsylvanica (E.A. Bielz, 1859) - (OXYCHILIDAE)
- transsilvanica, Pupilla transsilvanica M. von Kimakowicz, 1890 - syn of: Pupilla muscorum (C. Linnaeus, 1758) - (PUPILLIDAE)
- transsylvanica, Acicula transsylvanica A.J. Wagner, 1912 - (ACICULIDAE)
- transsylvanica, Pisania transsylvanica R. Hoernes & M. Auinger, 1884 † - (BUCCINIDAE) (FOSSIL)
- transsylvanica, Andraea dubia transsylvanica A. Schmidt, 1857 - (CLAUSILIIDAE)
- transsylvanica, Laciniaria plicata transsylvanica M. von Kimakowicz, 1883 - (CLAUSILIIDAE)
- transsylvanica, Helix transsylvanica W. Kobelt, 1906 - syn of: Helix pomatia C. Linnaeus, 1758 - (HELICIDAE)
- transsylvanica, Bythiospeum transsylvanica (M. Rotarides, 1943) - (HYDROBIIDAE)
- transsylvanica, Lozekia transsylvanica (C.A. Westerlund, 1876) - (HYGROMIIDAE)
- transsylvanica, Kosmolamellotis transsylvanica Horvath, 1966 † - (LAMELLOTIDAE) (FOSSIL)
- transsylvanica, Limax transsylvanica D.F. Heynemann, 1862 - syn of: Limax cinereoniger J. Wolf in T. Sturm, 1803 - (LIMACIDAE)
- transsylvanica, Cibinia transsylvanica (E.A. Bielz, 1859) - (OXYCHILIDAE)
- transsylvanica, Vitrea transsylvanica (S. Clessin, 1877) - (PRISTILOMATIDAE)
- transsylvanica, Anodonta transsylvanica F. Haas, 1911 - syn of: Anodonta cygnea (C. Linnaeus, 1758) - (UNIONIDAE)
- transsylvanica, Hyalinia transsylvanica S. Clessin, 1877 - syn of: Vitrea transsylvanica (S. Clessin, 1877) - (ZONITIDAE)
- transsylvanica aphrodite, Lozekia transsylvanica aphrodite (C.A. Westerlund, 1876) - (HYGROMIIDAE)
- transsylvanicum, Eleniceras transsylvanicum (E. Jekelius, 1915 †) - (NEOCOMITIDAE) (FOSSIL)
- transsylvanicus, Deroceras transsylvanicus A.V. Grossu, 1969 - (AGRIOLIMACIDAE)
- transsylvanicus, Chelyconus transsylvanicus Hoernes & Auinger, 1879 † - (CONIDAE) (FOSSIL)
- transsylvanicus, Jaminia transsylvanicus M. von Kimakowicz, 1890 - (ENIDAE)
- transsylvanicus, Gyraulus transsylvanicus (M. von Neumayr, 1875 ) - (PLANORBIDAE)
- transsylvanus, Mesarion transsylvanus (H.R. Simroth, 1885) - (ARIONIDAE)
- transtrosa, Rhodope transtrosa L. Salvini-Plawén, 1991 - (RHODOPIDAE)
- transulcata, Circotheca transulcata Z.X. Qian, 1978 † - (CIRCOTHECIDAE) (FOSSIL)
- transulcens, Liloa transulcens A. Adams, 1862 - syn of: Liloa translucens (A. Adams, 1862) - (HAMINOEIDAE)
- transuralense, Eumorphoceras transuralense Ruzhentsev & Bogoslovskaya, 1971 † - (GIRTYOCERATIDAE) (FOSSIL)
- transuralense, Planitornoceras transuralense (Nalivkina, 1953 †) - (TORNOCERATIDAE) (FOSSIL)
- transvaalensis, Archachatina transvaalensis (E.A. Smith, 1878) - (ACHATINIDAE)
- transvaalensis, Ancylastrum transvaalensis A. Craven, 1880 - (PLANORBIDAE)
- transvaalensis, Tropidophora transvaalensis (J.C. Melvill & J.H. Ponsonby, 1891) - (POMATIIDAE)
- transversa, Cleionychia transversa (Portlock, 1843 †) - (AMBONYCHIIDAE) (FOSSIL)
- transversa, Anomia transversa Seeley, 1861 † - (ANOMIIDAE) (FOSSIL)
- transversa, Anomia transversa A. Aradas, 1847 - syn of: Monia patelliformis (C. Linnaeus, 1773) - (ANOMIIDAE)
- transversa, Anadara transversa (T. Say, 1822) - (ARCIDAE)
- transversa, Cetoconcha transversa (É.A.A. Locard, 1898) - (CETOCONCHIDAE)
- transversa, Zafrona transversa R.P.J. Hervier, 1899 - syn of: Zafrona isomella (P.L. Duclos, 1840) - (COLUMBELLIDAE)
- transversa, Cucullaea transversa T. Nagao, 1934 † - (CUCULLAEIDAE) (FOSSIL)
- transversa, Cucullaea transversa B. Rogers & B. Rogers, 1839 † - (CUCULLAEIDAE) (FOSSIL)
- transversa, Idonearca transversa T.A. Conrad 1862 † - (CUCULLAEIDAE) (FOSSIL)
- transversa, Cucullaea transversa W.M. Gabb, 1862 † - syn of: Cucullaea gabbi Johnson, 1905 † - (CUCULLAEIDAE) (FOSSIL)
- transversa, Corbicula transversa E.C. Von Martens, 1877 - syn of: Corbicula japonica T. Prime, 1864 - (CYRENIDAE)
- transversa, Naticopsis transversa (Beede, 1907 †) - (DELPHINULOPSIDAE) (FOSSIL)
- transversa, Etheria transversa J.B.P.A. Lamarck, 1807 - syn of: Etheria elliptica J.B.P.A. Lamarck, 1807 - (ETHERIIDAE)
- transversa, Scintilla transversa G.F. Dollfus & P. Dautzenberg, 1886 † - (GALEOMMATIDAE) (FOSSIL)
- transversa, Holopea transversa Lindström, 1884 † - (HOLOPEIDAE) (FOSSIL)
- transversa, Pyrgulopsis transversa R. Hershler, 1998 - (HYDROBIIDAE)
- transversa, Kellia transversa E. Forbes, 1844 - syn of: Mendicula oblonga (T.A. de M. Monterosato, 1878) - (KELLIIDAE)
- transversa, Limopsis transversa É.A.A. Locard, 1898 - syn of: Limopsis tenella J.G. Jeffreys, 1876 - (LIMOPSIDAE)
- transversa, Myrtea transversa (E.A. Smith, 1915) - (LUCINIDAE)
- transversa, Ctena transversa W.H. Dall, P. Bartsch & H.A. Rehder, 1938 - syn of: Epicodakia sweeti (C. Hedley, 1899) - (LUCINIDAE)
- transversa, Oxyperas transversa (L.A. Reeve, 1854) - (MACTRIDAE)
- transversa, Ovocerina transversa (Barrande, 1865 †) - (MANDALOCERATIDAE) (FOSSIL)
- transversa, Astartila transversa J.B.M. Dana, 1847 † - syn of: Astartila intrepida J.B.M. Dana, 1847 † - (MEGADESMIDAE) (FOSSIL)
- transversa, Mesodesma transversa L.A. Reeve, 1854 - syn of: Donacilla cornea (G.S. Poli, 1791) - (MESODESMATIDAE)
- transversa, Palaeoscurria transversa J. Perner, 1903 † - (METOPTOMATIDAE) (FOSSIL)
- transversa, Myochama transversa A. Adams, 1850 - (MYOCHAMIDAE)
- transversa, Myophoria transversa Bornemann, 1856 † - (MYOPHORIIDAE) (FOSSIL)
- transversa, Nuculana transversa Martin, 1883 † - (NUCULANIDAE) (FOSSIL)
- transversa, Doryssa transversa (I. Lea, 1850) - (PACHYCHILIDAE)
- transversa, Fasciculiconcha transversa (Sowerby 1840) † - (PECTINIDA (UNASSIGNED)) (FOSSIL)
- transversa, Fossarus transversa Beede, 1907 † - syn of: Naticopsis transversa (Beede, 1907 †) - (PLANAXIDAE) (FOSSIL)
- transversa, Cetomya transversa (W.H. Dall, P. Bartsch & H.A. Rehder, 1938) - (POROMYIDAE)
- transversa, Pteria transversa G.P. Deshayes, 1858 † - (PTERIIDAE) (FOSSIL)
- transversa, Pterotheca transversa (Portlock, 1843 †) - (PTEROTHECIDAE) (FOSSIL)
- transversa, Tellina transversa G.P. Deshayes, 1857 † - (TELLINIDAE) (FOSSIL)
- transversa, Thracia transversa (Lea) † - (THRACIIDAE) (FOSSIL)
- transversa, Adontorhina transversa (C.M. Payne & J.A. Allen, 1991) - (THYASIRIDAE)
- transversa, Mendicula transversa C.M. Payne & J.A. Allen, 1991 - syn of: Adontorhina transversa (C.M. Payne & J.A. Allen, 1991) - (THYASIRIDAE)
- transversa, Ungulina transversa J.B.P.A. Lamarck, 1818 - syn of: Ungulina cuneata (L. Spengler, 1798) - (UNGULINIDAE)
- transversa, Tivela transversa (G.B. III Sowerby, 1897) - (VENERIDAE)
- transversa, Verticordia transversa É.A.A. Locard, 1898 - syn of: Cetoconcha transversa (É.A.A. Locard, 1898) - (VERTICORDIIDAE)
- transversa demiri, Anadara transversa demiri P. Piani, 1981 - (ARCIDAE)
- transversale, Parvicardium transversale G.P. Deshayes, 1854 - syn of: Parvicardium vroomi J.J. Van Aartsen, H.P.M.G. Menkhorst & E. Gittenberger, 1984 - (CARDIIDAE)
- transversale, Phragmoceras transversale Hedstrom, 1917 † - (PHRAGMOCERATIDAE) (FOSSIL)
- transversale, Sphaerium transversale C.A. Westerlund, 1898 - syn of: Sphaerium asiaticum (E.C. Von Martens, 1864) - (SPHAERIIDAE)
- transversalis, Achatinella transversalis L. Pfeiffer - syn of: Amastra transversalis L. Pfeiffer, 1856 - (ACHATINELLIDAE)
- transversalis, Amastra transversalis L. Pfeiffer, 1856 - (AMASTRIDAE)
- transversalis, Anadara transversalis H. Adams, 1872 - syn of: Anadara antiquata (C. Linnaeus, 1758) - (ARCIDAE)
- transversalis, Chloritis transversalis (A. Mousson, 1857) - (CAMAENIDAE)
- transversalis, Nehdenites transversalis Sobolew, 1914 † - syn of: Nehdenites acrilobus (Sobolew, 1914 †) - (CHEILOCERATIDAE) (FOSSIL)
- transversalis, Helix transversalis A. Mousson, 1857 - syn of: Chloritis transversalis (A. Mousson, 1857) - (HELICIDAE)
- transversalis, Coecella transversalis G.P. Deshayes, 1855 - syn of: Coecella horsfieldii J.E. Gray, 1853 - (MESODESMATIDAE)
- transversalis, Theodoxus transversalis (L. Pfeiffer, 1828) - (NERITIDAE)
- transversalis, Illyriobanatica schmidtii transversalis (C.A. Westerlund, 1894) - (ORCULIDAE)
- transversalis, Bulinus transversalis E.C. Von Martens, 1897 - (PLANORBIDAE)
- transversalis, Anomalocardia transversalis H. Adams, 1872 - syn of: Anadara antiquata (C. Linnaeus, 1758) - (VENERIDAE)
- transversalis bryani, Amastra transversalis bryani H.A. Pilsbry & C.M. Cooke, 1914 - (AMASTRIDAE)
- transversaria, Turricula transversaria (J.B.P.A. Lamarck, 1804 †) - (CLAVATULIDAE) (FOSSIL)
- transversaria, Acirsa transversaria G.P. Deshayes, 1861 † - (EPITONIIDAE) (FOSSIL)
- transversaria, Rissoina transversaria G.P. Deshayes, 1861 † - (RISSOINIDAE) (FOSSIL)
- transversaria, Diplodonta transversaria A.E.M. Cossmann, 1883 † - (UNGULINIDAE) (FOSSIL)
- transversaria, Circe transversaria G.P. Deshayes, 1854 - syn of: Gafrarium divaricatum (J.F. Gmelin, 1791) - (VENERIDAE)
- transversaria tenuistriata, Turricula transversaria tenuistriata P. Brebion, 1992 † - (CLAVATULIDAE) (FOSSIL)
- transversarium, Gregoryceras transversarium (F.A. von Quenstedt, 1849 †) - (ASPIDOCERATIDAE) (FOSSIL)
- transversarium, Lepton transversarium A.E.M. Cossmann, 1896 † - (LASAEIDAE) (FOSSIL)
- transverseplicata, Cymbiola transverseplicata (A. Pannekoek, 1936 †) - (VOLUTIDAE) (FOSSIL)
- transversetaeniatus, Theodoxus fluviatilis transversetaeniatus A.J. Wagner, 1928 - (NERITIDAE)
- transversocordatus, Lecanospira transversocordatus Stauffer, 1937 † - (OPHILETIDAE) (FOSSIL)
- transversostriatum, Fissidentalium transversostriatum M. Boissevain, 1906 - (DENTALIIDAE)
- transversum, Microcardium transversum H.A. Rehder & R.T. Abbott, 1951 - syn of: Microcardium tinctum (W.H. Dall, 1881) - (CARDIIDAE)
- transversum, Gomphoceras transversum Barrande, 1865 † - syn of: Ovocerina transversa (Barrande, 1865 †) - (DIESTOCERATIDAE) (FOSSIL)
- transversum, Barnesoceras transversum Flower, 1964 † - (ELLESMEROCERATIDAE) (FOSSIL)
- transversum, Cyclonema transversum Ulrich & Scofield, 1897 † - (PLATYCERATIDAE) (FOSSIL)
- transversum, Treptoceras transversum (Miller, 1875 †) - (PROTEOCERATIDAE) (FOSSIL)
- transversum, Amphidesma transversum T. Say, 1831 - syn of: Scrobicularia plana (E.M. Da Costa, 1778) - (SEMELIDAE)
- transversum, Sphaerium transversum T. Say, 1829 - (SPHAERIIDAE)
- transversum, Faberoceras transversum Flower, 1946 † - (WESTONOCERATIDAE) (FOSSIL)
- transversus, Drepanocheilus transversus (W.M. Gabb, 1869 †) - (APORRHAIDAE) (FOSSIL)
- transversus, Capulus transversus C.L.F. von Sandberger, 1862 † - (CAPULIDAE) (FOSSIL)
- transversus, Donax transversus G.B. I Sowerby, 1825 - (DONACIDAE)
- transversus, Pectunculus transversus J.B.P.A. Lamarck, 1819 - syn of: Glycymeris nummaria (C. Linnaeus, 1758) - (GLYCYMERIDIDAE)
- transversus, Inoceramus transversus (Seeley) † - (INOCERAMIDAE) (FOSSIL)
- transversus, Megaxinus transversus (H.G. Bronn, 1831 †) - (LUCINIDAE) (FOSSIL)
- transversus, Strophostylus transversus J.W. Hall, 1859 † - (PLATYCERATIDAE) (FOSSIL)
- transversus gibbosulus, Donax transversus gibbosulus C. Mayer, 1858 † - (DONACIDAE) (FOSSIL)
- Transylvanella, Genus Transylvanella Kutassy, 1937 † (PLEUROTOMARIOIDEA (UNASSIGNED)) (FOSSIL)
- transylvanica, Strigilecula cana transylvanica (A. Schmidt, 1853) - (CLAUSILIIDAE)
- transylvanica, Paladilhia transylvanica M. Rotarides, 1943 - (MOITESSIERIIDAE)
- transylvanica, Scissurella transylvanica A.E. Reuss, 1860 † - (SCISSURELLIDAE) (FOSSIL)
- transylvanica, Terebra cacellensis transylvanica R. Hoernes & M. Auinger, 1880 † - (TEREBRIDAE) (FOSSIL)
- transylvanica, Coralliophaga transylvanica (R. Hoernes, 1870 †) - (TRAPEZIDAE) (FOSSIL)
- trapa, Murex trapa P.F. Röding, 1798 - (MURICIDAE)
- trapa, Drupa trapa P.F. Röding, 1798 - syn of: Menathais tuberosa (P.F. Röding, 1798) - (MURICIDAE)
- trapani, Setia maculata trapani T.A. de M. Monterosato, 1869 - (RISSOIDAE)
- Trapania, Genus Trapania A. Pruvot-Fol, 1931 (GONIODORIDIDAE)
- trapanica, Cernuella trapanica S. Berthelot in É.A.A. Locard, 1894 - syn of: Cernuella virgata (E.M. Da Costa, 1778) - (HYGROMIIDAE)
- trapaquara, Claibornicardia trapaquara (G.F. Harris, 1895 †) - (CARDITIDAE) (FOSSIL)
- trapaquara, Ringicula trapaquara † - (RINGICULIDAE) (FOSSIL)
- trapequara, Ringicula trapequara G.F. Harris, 1895 † - (RINGICULIDAE) (FOSSIL)
- trapesialis, Iridina trapesialis L.H. Hupé, 1857 - syn of: Leila blainvilliana (I. Lea, 1834) - (IRIDINIDAE)
- trapesialis, Anodontites trapesialis (J.B.P.A. Lamarck, 1818) - (MYCETOPODIDAE)
- trapesialis, Anodonta trapesialis J.B.P.A. Lamarck, 1818 - syn of: Anodontites trapesialis (J.B.P.A. Lamarck, 1818) - (UNIONIDAE)
- trapesialis aroanus, Anodontites trapesialis aroanus H.B. Baker, 1930 - (MYCETOPODIDAE)
- trapesialis aurora, Anodontites trapesialis aurora W.B. Marshall, 1915 - (MYCETOPODIDAE)
- trapesialis cygneiformis, Anodontites trapesialis cygneiformis (H.A. Pilsbry, 1896) - (MYCETOPODIDAE)
- trapesialis darochai, Anodontites trapesialis darochai W.B. Marshall, 1915 - (MYCETOPODIDAE)
- trapesialis exotica, Anodontites trapesialis exotica (J.B.P.A. Lamarck, 1818) - (MYCETOPODIDAE)
- trapesialis forbesiana, Anodontites trapesialis forbesiana (I. Lea, 1860) - (MYCETOPODIDAE)
- trapesialis giganteus, Anodontites trapesialis giganteus (J.B. von Spix & J.A. Wagner, 1827) - (MYCETOPODIDAE)
- trapesialis scripta, Anodontites trapesialis scripta (G.B. Sowerby, 1867) - (MYCETOPODIDAE)
- trapesialis sinaloensis, Anodontites trapesialis sinaloensis J.C.H. Crosse & P.H. Fischer, 1883 - (MYCETOPODIDAE)
- trapesialis sinuosa, Anodontites trapesialis sinuosa (J.B.P.A. Lamarck, 1819) - (MYCETOPODIDAE)
- trapesialis susannae, Anodontites trapesialis susannae (E. Griffith & E. Pidgeon, 1833) - (MYCETOPODIDAE)
- trapesina, Gaimardia trapesina (J.B.P.A. Lamarck, 1819) - (GAIMARDIIDAE)
- trapesina, Modiolus trapesina J.B.P.A. Lamarck, 1819 - syn of: Gaimardia trapesina (J.B.P.A. Lamarck, 1819) - (MYTILIDAE)
- trapesina coccinea, Gaimardia trapesina coccinea C. Hedley, 1916 - syn of: Gaimardia coccinea C. Hedley, 1916 - (GAIMARDIIDAE)
- trapesina flemingi, Gaimardia trapesina flemingi A.W.B. Powell, 1955 - syn of: Gaimardia trapesina (J.B.P.A. Lamarck, 1819) - (GAIMARDIIDAE)
- trapeza, Euciroa trapeza J. Poutiers, 1982 - (EUCIROIDAE)
- trapeza, Pleurotomaria trapeza Hudleston † - (PLEUROTOMARIIDAE) (FOSSIL)
- trapezea, Anodontites trapezea (J.B. von Spix & J.A. Wagner, 1827) - (MYCETOPODIDAE)
- trapezea, Anodonta trapezea H.F.A. von Ihering, 1890 - syn of: Anodontites trapezea (J.B. von Spix & J.A. Wagner, 1827) - (UNIONIDAE)
- trapezea caipira, Glabaris trapezea caipira H.F.A. von Ihering, 1893 - syn of: Anodontites trapezea (J.B. von Spix & J.A. Wagner, 1827) - (MYCETOPODIDAE)
- trapezea sowerbyana, Glabaris trapezea sowerbyana H.F.A. von Ihering, 1893 - syn of: Anodontites trapezea (J.B. von Spix & J.A. Wagner, 1827) - (MYCETOPODIDAE)
- trapezea spixii, Anodonta trapezea spixii H.F.A. von Ihering, 1890 - syn of: Anodontites trapezea (J.B. von Spix & J.A. Wagner, 1827) - (UNIONIDAE)
- trapezensis, Schileykula trapezensis (F.J. Stojaspal, 1981) - (ORCULIDAE)
- trapezensis acampsis, Schileykula trapezensis acampsis B. Hausdorf, 1996 - (ORCULIDAE)
- trapezensis contraria, Schileykula trapezensis contraria E. Neubert, 1993 - (ORCULIDAE)
- trapezensis neuberti, Schileykula trapezensis neuberti B. Hausdorf, 1996 - (ORCULIDAE)
- trapezia, Anadara trapezia (G.P. Deshayes, 1839) - (ARCIDAE)
- trapezia, Arca trapezia G.P. Deshayes, 1839 - syn of: Anadara trapezia (G.P. Deshayes, 1839) - (ARCIDAE)
- trapezia, Glans trapezia (C. Linnaeus, 1767) - (CARDITIDAE)
- trapezia, Chama trapezia C. Linnaeus, 1767 - syn of: Glans trapezia (C. Linnaeus, 1767) - (CHAMIDAE)
- trapezia, Chambardia trapezia (E.C. Von Martens, 1897) - (IRIDINIDAE)
- trapezia, Glabaris trapezia H.F.A. von Ihering, 1893 - syn of: Anodontites trapezea (J.B. von Spix & J.A. Wagner, 1827) - (MYCETOPODIDAE)
- trapezia, Myochama trapezia G.B. Pritchard, 1895 † - (MYOCHAMIDAE) (FOSSIL)
- trapezia, Philine trapezia C. Hedley, 1902 - (PHILINIDAE)
- trapezia albida, Cardita trapezia albida M.E.J. Bucquoy, P. Dautzenberg & G.F. Dollfus, 1892 - syn of: Glans trapezia (C. Linnaeus, 1767) - (CARDITIDAE)
- trapezia ovoidea, Spathopsis trapezia ovoidea G. Mandahl-Barth, 1988 - syn of: Chambardia trapezia (E.C. Von Martens, 1897) - (IRIDINIDAE)
- trapezia pirilla, Cardita trapezia pirilla A. De Gregorio, 1885 - syn of: Glans trapezia (C. Linnaeus, 1767) - (CARDITIDAE)
- trapezia posita, Arca trapezia posita T. Iredale, 1939 - syn of: Anadara trapezia (G.P. Deshayes, 1839) - (ARCIDAE)
- trapezia rosea, Cardita trapezia rosea M.E.J. Bucquoy, P. Dautzenberg & G.F. Dollfus, 1892 - syn of: Glans trapezia (C. Linnaeus, 1767) - (CARDITIDAE)
- trapezia senilis, Spatha trapezia senilis E.C. Von Martens, 1897 - syn of: Chambardia trapezia (E.C. Von Martens, 1897) - (IRIDINIDAE)
- trapezia sulphurea, Cardita trapezia sulphurea M.E.J. Bucquoy, P. Dautzenberg & G.F. Dollfus, 1892 - syn of: Glans trapezia (C. Linnaeus, 1767) - (CARDITIDAE)
- trapezialis, Waldo trapezialis D.G. Zelaya & C.F. Ituarte, 2002 - (LASAEIDAE)
- trapezialis, Anodontites trapezialis J.B.P.A. Lamarck, 1818 - syn of: Anodontites trapesialis (J.B.P.A. Lamarck, 1818) - (MYCETOPODIDAE)
- trapezialis, Leila trapezialis L.H. Hupé, 1857 - syn of: Leila blainvilliana (I. Lea, 1834) - (MYCETOPODIDAE)
- trapeziana rotundum, Anodonta trapeziana rotundum A. Doering, 1874 - syn of: Anodontites trapezea (J.B. von Spix & J.A. Wagner, 1827) - (UNIONIDAE)
- Trapezicardita, Genus Trapezicardita Casey, 1961 † (CARDITIDAE) (FOSSIL)
- TRAPEZIDAE Lamy, 1920 (1895) - Family (BIVALVIA-HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-VENERIDA [Order]-ARCTICOIDEA [Superfamily])
- Trapezidens, Genus Trapezidens Bolotov, Vikhrev & Konopleva, 2017 (UNIONIDAE)
- trapeziforma, Curvirimula trapeziforma (Dewar) † - (NAIADITIDAE) (FOSSIL)
- trapeziformis, Acar trapeziformis K. Martin, 1879 † - (ARCIDAE) (FOSSIL)
- trapeziformis, Neomenia trapeziformis L. Salvini-Plawén, 1978 - (NEOMENIIDAE)
- trapeziformis, Indotrigonia trapeziformis (Kitchin, 1903 †) - (TRIGONIIDA (unassigned)) (FOSSIL)
- trapeziformis, Kitchingonia trapeziformis (Kitchin, 1903) † - (TRIGONIIDAE) (FOSSIL)
- TRAPEZIIDAE - syn of Family: TRAPEZIDAE
- trapezina, Barbatia trapezina (J.B.P.A. Lamarck, 1819) - (ARCIDAE)
- trapezina, Phaseolicama trapezina L.H. Hupé in C. Gay, 1854 - syn of: Gaimardia trapesina (J.B.P.A. Lamarck, 1819) - (CYAMIIDAE)
- trapezina, Amblychilepas trapezina G.B. Sowerby, 1835 - syn of: Amblychilepas javanicensis (J.B.P.A. Lamarck, 1822) - (FISSURELLIDAE)
- trapezina, Gaimardia trapezina J.B.P.A. Lamarck, 1819 - syn of: Gaimardia trapesina (J.B.P.A. Lamarck, 1819) - (GAIMARDIIDAE)
- trapezina, Dendostrea trapezina (J.B.P.A. Lamarck, 1819) - (OSTREIDAE)
- trapezina, Adacnarca trapezina (F. Bernard, 1897) - (PHILOBRYIDAE)
- trapezina, Lissarca trapezina F. Bernard, 1897 - syn of: Adacnarca trapezina (F. Bernard, 1897) - (PHILOBRYIDAE)
- trapezina decussata, Barbatia trapezina decussata (G.B. I Sowerby, 1833) - (ARCIDAE)
- trapezium, Anisodonta trapezium M. Yokoyama, 1920 - syn of: Basterotia gouldi (A. Adams, 1864) - (BASTEROTIIDAE)
- trapezium, Parvicardium trapezium A. Cecalupo & P. Quadri, 1996 - (CARDIIDAE)
- trapezium, Conus trapezium P.F. Röding, 1798 - (CONIDAE)
- trapezium, Opisthostoma trapezium W.S.S. Van Benthem-Jutting, 1952 - (DIPLOMMATINIDAE)
- trapezium, Pleuroploca trapezium (C. Linnaeus, 1758) - (FASCIOLARIIDAE)
- trapezium, Pleuroploca trapezium G. Perry, 1811 - syn of: Filifusus filamentosus (P.F. Röding, 1798) - (FASCIOLARIIDAE)
- trapezium, Murex trapezium C. Linnaeus, 1758 - syn of: Pleuroploca trapezium (C. Linnaeus, 1758) - (MURICIDAE)
- trapezium, Dolabra trapezium (J. de C. Sowerby) † - (MYOPHORICARDIIDAE) (FOSSIL)
- trapezium, Parallelodon trapezium Cox, 1928 † - (PARALLELODONTIDAE) (FOSSIL)
- Trapezium, Genus Trapezium J.K. Megerle Von Mühlfeld, 1811 (TRAPEZIDAE)
- trapezium audouini, Pleuroploca trapezium audouini I.H. Jonas, 1846 - syn of: Pleuroploca audouini (I.H. Jonas, 1846) - (FASCIOLARIIDAE)
- trapezium intermedia, Pleuroploca trapezium intermedia (W. Kobelt, 1875) - (FASCIOLARIIDAE)
- trapezium paeteli, Pleuroploca trapezium paeteli H. Strebel, 1912 - syn of: Pleuroploca trapezium (C. Linnaeus, 1758) - (FASCIOLARIIDAE)
- trapezium ponderosa, Pleuroploca trapezium ponderosa (I.H. Jonas, 1850) - syn of: Pleuroploca ponderosa (I.H. Jonas, 1850) - (FASCIOLARIIDAE)
- trapezius, Xixiangethes trapezius Z.X. Qian & al., 2001 † - (TRAPEZOVITIDAE) (FOSSIL)
- trapezoida, Anadara trapezoida Tiwari, 2001 † - (ARCIDAE) (FOSSIL)
- trapezoidale, Microcardium trapezoidale J. Poutiers, 2006 - (CARDIIDAE)
- trapezoidale, Permodomatoceras trapezoidale Ruzhentsev & Shimanskiy, 1954 † - (DOMATOCERATIDAE) (FOSSIL)
- trapezoidalis, Antiquicyprina trapezoidalis Wen, 1979 † - (ARCTICIDAE) (FOSSIL)
- trapezoidalis, Izumia trapezoidalis Ichikawa & Maeda 1963 † - (ARCTICIDAE) (FOSSIL)
- trapezoidalis, Oxyeurax trapezoidalis (Stanton, 1895 †) - (ASTARTIDAE) (FOSSIL)
- trapezoidalis, Permoperna trapezoidalis (Kayser, 1883 †) - (BAKEVELLIIDAE) (FOSSIL)
- trapezoidalis, Rakhia trapezoidalis Eames 1951 † - (CARDIIDA (UNASSIGNED)) (FOSSIL)
- trapezoidalis, Celtites trapezoidalis L. Waagen, 1895 † - (CELTITIDAE) (FOSSIL)
- trapezoidalis, Cypricardella trapezoidalis Reed, 1944 † - (CRASSATELLIDAE) (FOSSIL)
- trapezoidalis, Paratirolites trapezoidalis Shevyrev, 1965 † - (DZHULFITIDAE) (FOSSIL)
- trapezoidalis, Jeanthieuloyites trapezoidalis Avram & Gradinaru, 1993 † - (HOLCODISCIDAE) (FOSSIL)
- trapezoidalis, Euhoplites trapezoidalis (Spath, 1928 †) - (HOPLITIDAE) (FOSSIL)
- trapezoidalis, Arctohungarites trapezoidalis A.M. Popov, 1961 † - (LONGOBARDITIDAE) (FOSSIL)
- trapezoidalis, Lutraria trapezoidalis Powell & J.A. Bartrum, 1929 † - (MACTRIDAE) (FOSSIL)
- trapezoidalis, Nuculites trapezoidalis L. Waagen 1881 † - (MALLETIIDAE) (FOSSIL)
- trapezoidalis, Myalina trapezoidalis Kayser, 1883 † - syn of: Permoperna trapezoidalis (Kayser, 1883 †) - (MYALINIDAE) (FOSSIL)
- trapezoidalis, Nautilus trapezoidalis J. Von Hauer, 1860 † - syn of: Juvavionautilus trapezoidalis (J. Von Hauer, 1860 †) - (NAUTILIDAE) (FOSSIL)
- trapezoidalis, Eoasianites trapezoidalis Maximova, 1948 † - (NEOICOCERATIDAE) (FOSSIL)
- trapezoidalis, Palaeocardita trapezoidalis Krumbeck, 1913 † - (PALAEOCARDITIDAE) (FOSSIL)
- trapezoidalis, Palaeomutela trapezoidalis Amalitsky, 1892 † - (PALAEOMUTELIDAE) (FOSSIL)
- trapezoidalis, Periploma trapezoidalis H.M.D. de Blainville, 1825 - syn of: Periploma margaritaceum (J.B.P.A. Lamarck, 1801) - (PERIPLOMATIDAE)
- trapezoidalis, Prionites trapezoidalis L. Waagen, 1895 † - (PRIONITIDAE) (FOSSIL)
- trapezoidalis, Juvavionautilus trapezoidalis (J. Von Hauer, 1860 †) - (SYRINGONAUTILIDAE) (FOSSIL)
- trapezoidalis, Thracia trapezoidalis H.M.D. de Blainville, 1825 - syn of: Periploma margaritaceum (J.B.P.A. Lamarck, 1801) - (THRACIIDAE)
- trapezoidalis, Unionites trapezoidalis Mansuy, 1919 † - (TRIGONODIDAE) (FOSSIL)
- trapezoidalis, Venus trapezoidalis J.D. Kurtz, 1860 - syn of: Chioneryx grus (F.S. Holmes, 1858) - (VENERIDAE)
- trapezoidalis quadrata, Antiquicyprina trapezoidalis quadrata Wen, 1979 † - (ARCTICIDAE) (FOSSIL)
- trapezoidea, Burnupia trapezoidea (O. Böttger, 1910) - (PLANORBIDAE)
- trapezoidea, Ancylus trapezoidea O. Böttger, 1910 - syn of: Burnupia trapezoidea (O. Böttger, 1910) - (PLANORBIDAE)
- trapezoidea, Avicula trapezoidea Klipstein, 1843 † - syn of: Cassianella tenuistria (Münster, 1841 †) - (PTERIIDAE) (FOSSIL)
- trapezoidea, Haliris trapezoidea (G. Seguenza, 1876) - (VERTICORDIIDAE)
- trapezoides, Periploma trapezoides J.B.P.A. Lamarck, 1818 - syn of: Periploma margaritaceum (J.B.P.A. Lamarck, 1801) - (PERIPLOMATIDAE)
- trapezoides, Gyraulus trapezoides W. Polinski, 1929 - (PLANORBIDAE)
- trapezoides, Solemya trapezoides F.B. Meek, 1874 † - (SOLEMYIDAE) (FOSSIL)
- trapezoides, Thracia trapezoides T.A. Conrad, 1849 - (THRACIIDAE)
- trapezoides, Verticordia trapezoides G. Seguenza, 1876 - syn of: Haliris trapezoidea (G. Seguenza, 1876) - (VERTICORDIIDAE)
- trapezoideum, Onchidium trapezoideum C.G. Semper, 1885 - (ONCHIDIIDAE)
- trapezoideum, Pisidium trapezoideum V. Sterki, 1896 - syn of: Pisidium casertanum (Poli, 1791) - (SPHAERIIDAE)
- trapezoideum protensum, Pisidium trapezoideum protensum V. Sterki, 1916 - syn of: Pisidium casertanum (Poli, 1791) - (SPHAERIIDAE)
- trapezoideus, Paracerastus trapezoideus (E.C. Von Martens, 1892) - (CERASTUIDAE)
- Trapezoideus, Genus Trapezoideus C.T. Simpson, 1900 (UNIONIDAE)
- trapezoidiformis, Pleuroceras solare trapezoidiformis Maubeuge, 1951 † - (AMALTHEIDAE) (FOSSIL)
- trapezoidis, Panomya trapezoidis MANCA Straugh - syn of: Panomya ampla W.H. Dall, 1898 - (HIATELLIDAE)
- trapezoidis, Panomya trapezoidis F. Strauch, 1972 - syn of: Panomya norvegica (L. Spengler, 1793) - (HIATELLIDAE)
- Trapezotheca, Genus Trapezotheca Syssoiev , 1958 † (ORTHOTHECIDAE) (FOSSIL)
- TRAPEZOVITIDAE Volkov, 1975 † - Family (HYOLITHA-SULCAVITIDA [Order]) (FOSSIL)
- Trapezovitus, Genus Trapezovitus Syssoiev , 1958 † (SULCAVITIDAE) (FOSSIL)
- Trapidodiscus, syn of: Genus Tropidodiscus Meek & Worthen, 1866 † (TROPIDODISCIDAE) (FOSSIL)
- trappei, Monodonta trappei F. Nordsieck, 1982 - syn of: Phorcus atratus trappei F. Nordsieck, 1982 - (TROCHIDAE)
- trappei, Phorcus atratus trappei F. Nordsieck, 1982 - (TROCHIDAE)
- traski, Proarcestes traski Smith, 1927 † - (ARCESTIDAE) (FOSSIL)
- traski, Stagnicola traski G.W. Tryon, 1863 - (LYMNAEIDAE)
- traski, Physa traski I. Lea, 1884 - syn of: Haitia mexicana (R.A. Philippi, 1841) - (PHYSIDAE)
- traski, Planorbella traski H.C. Lea, 1856 - (PLANORBIDAE)
- traski, Tropites traski Smith, 1927 † - syn of: Margaritropites johnsoni Smith, 1927 † - (TROPITIDAE) (FOSSIL)
- traskii, Acteon traskii R.E.C. Stearns, 1898 - (ACTEONIDAE)
- traskii, Fusinus traskii W.H. Dall, 1915 - syn of: Fusinus barbarensis (J.B. Trask, 1855) - (FASCIOLARIIDAE)
- traskii, Helminthoglypta traskii (W. Newcomb, 1861) - (HELMINTHOGLYPTIDAE)
- traskii, Lyriochlamys traskii (W.M. Gabb, 1864 †) - (PECTINIDAE) (FOSSIL)
- traskii coronadoensis, Helminthoglypta traskii coronadoensis (P. Bartsch, 1916) - (HELMINTHOGLYPTIDAE)
- traskii willetti, Helminthoglypta traskii willetti (S.S. Berry, 1920) - (HELMINTHOGLYPTIDAE)
- Traskites, Genus Traskites Hyatt & Smith, 1905 † (SANDLINGITIDAE) (FOSSIL)
- trastikensis, Conohibolithes trastikensis (Stoyanova-Vergilova, 1965 †) - (MESOHIBOLITHIDAE) (FOSSIL)
- tratanensis, Macrochlamys tratanensis (F.P. Jousseaume, 1894) - (ARIOPHANTIDAE)
- traubi, Eutrephoceras traubi Schultz, 1976 † - (NAUTILIDAE) (FOSSIL)
- Traumatophora, Genus Traumatophora C.M.F. Ancey, 1887 (CAMAENIDAE)
- trauseli, Mirarissoina trauseli M.J. Faber & F.J.A. Slieker, 2014 - (ZEBINIDAE)
- trauthi, Holcobelus trauthi Stolley, 1927 † - (HOLCOBELIDAE) (FOSSIL)
- trauthi, Subgarantiana trauthi (Bentz, 1928 †) - (PARKINSONIIDAE) (FOSSIL)
- trautscholdi, Ammonites trautscholdi Sinzow, 1870 † - syn of: Sinzovia sazonovae Wright, 1996 † - (AMMONITIDA (unassigned)) (FOSSIL)
- trautscholdi, Naticopsis trautscholdi Fliegel, 1901 † - (DELPHINULOPSIDAE) (FOSSIL)
- trautscholdi, Neogeoceras trautscholdi (C. Gemmellaro, 1887 †) - (MEDLICOTTIIDAE) (FOSSIL)
- trautscholdi, Nautilus trautscholdi L. Waagen, 1879 † - syn of: Tainoceras trautscholdi (L. Waagen, 1879 †) - (NAUTILIDAE) (FOSSIL)
- trautscholdi, Khetella trautscholdi Blagovetshenskiy & Shumilkin, 2006 † - (PSEUDOTRITONIIDAE) (FOSSIL)
- trautscholdi, Tainoceras trautscholdi (L. Waagen, 1879 †) - (TAINOCERATIDAE) (FOSSIL)
- Trautscholdia, Subgenus Astarte (Trautscholdia) Cox & Arkell, 1948 † (ASTARTIDAE) (FOSSIL)
- trautwineana, Mytilopsis trautwineana (G.W. Tryon, 1866) - (DREISSENIDAE)
- trautwineana, Septifer trautwineana G.W. Tryon, 1866 - syn of: Mytilopsis trautwineana (G.W. Tryon, 1866) - (MYTILIDAE)
- trautwiniana, Anodonta trautwiniana I. Lea, 1852 - syn of: Anodontites carinata (R.W. Dunker, 1858) - (UNIONIDAE)
- travailleuri, Micropleurotoma travailleuri P. Bouchet & A. Warén, 1980 - (HORAICLAVIDAE)
- travancorense, Cerithium travancorense A. Dey, 1961 † - (CERITHIIDAE) (FOSSIL)
- travancorensis, Terebra travancorensis A. Dey, 1961 † - (TEREBRIDAE) (FOSSIL)
- travancorica, Euplecta travancorica (W.H. Benson, 1865) - (ARIOPHANTIDAE)
- travancorica, Gabbia travancorica (W.H. Benson, 1860) - (BITHYNIIDAE)
- travancorica, Cochlespira travancorica (E.A. Smith, 1896) - (COCHLESPIRIDAE)
- travancorica, Pearsonia travancorica (W.T. Blanford, 1869) - (CYCLOPHORIDAE)
- travancorica, Zonaria travancorica A. Dey, 1961 † - (CYPRAEIDAE) (FOSSIL)
- travancorica, Cellana travancorica H.B. Preston, 1911 - syn of: Cellana radiata (I. von Born, 1778) - (NACELLIDAE)
- travancorica, Tellina travancorica E.A. Smith, 1899 - (TELLINIDAE)
- travancorica granulata, Pagodasyrinx travancorica granulata (E.A. Smith, 1896) - syn of: Pagodasyrinx granulata (E.A. Smith, 1896) - (COCHLESPIRIDAE)
- travancoricum, Cyathopoma travancoricum R.H. Beddome, 1875 - (CYCLOPHORIDAE)
- travani, Cerithiella travani A. Cecalupo & I. Perugia, 2017 - (NEWTONIELLIDAE)
- travassosi, Agaronia travassosi F. Lange de Morretes, 1938 - (OLIVIDAE)
- traveli, Turbonilla traveli A. Peñas & E. Rolán, 2010 - (PYRAMIDELLIDAE)
- travellii, Strophiops travellii C.J. Maynard & W.F. Clapp, 1921 - (CERIONIDAE)
- traverseensis, Lusitromina traverseensis A.H. Clarke, 1961 - syn of: Iphinopsis traverseensis (A.H. Clarke, 1961) - (BUCCINIDAE)
- traverseensis, Tromina traverseensis A.H. Clarke, 1961 - syn of: Iphinopsis traverseensis (A.H. Clarke, 1961) - (BUCCINIDAE)
- traverseensis, Iphinopsis traverseensis (A.H. Clarke, 1961) - (CANCELLARIIDAE)
- traversi, Therasia traversi E.A. Smith, 1884 - (CHAROPIDAE)
- traversi, Fusus traversi F.W. Hutton, 1873 - syn of: Axymene traversi (F.W. Hutton, 1873) - (FASCIOLARIIDAE)
- traversi, Fusinus traversi F.W. Hutton, 1873 - syn of: Axymene traversi (F.W. Hutton, 1873) - (FASCIOLARIIDAE)
- traversi, Tucetona traversi (F.W. Hutton, 1873 †) - (GLYCYMERIDIDAE) (FOSSIL)
- traversi, Axymene traversi (F.W. Hutton, 1873) - (MURICIDAE)
- traversi, Xymene traversi F.W. Hutton, 1873 - syn of: Axymene traversi (F.W. Hutton, 1873) - (MURICIDAE)
- traversi, Powelliphanta traversi (A.W.B. Powell, 1930) - (RHYTIDIDAE)
- traversi aucklandicus, Xymene traversi aucklandicus E.A. Smith, 1902 - syn of: Axymene aucklandicus (E.A. Smith, 1902) - (MURICIDAE)
- traversi convexus, Xymene traversi convexus H.H. Suter, 1909 - syn of: Xymene convexus (H.H. Suter, 1909) - (MURICIDAE)
- traversi epirotica, Powelliphanta traversi epirotica A.W.B. Powell, 1946 - (RHYTIDIDAE)
- traversi erectus, Xymene traversi erectus (H.H. Suter, 1909) - syn of: Xymene erectus (H.H. Suter, 1909) - (MURICIDAE)
- traversi florida, Powelliphanta traversi florida A.W.B. Powell, 1946 - (RHYTIDIDAE)
- traversi koputaroa, Powelliphanta traversi koputaroa A.W.B. Powell, 1946 - (RHYTIDIDAE)
- traversi latizona, Powelliphanta traversi latizona A.W.B. Powell, 1949 - (RHYTIDIDAE)
- traversi otakia, Powelliphanta traversi otakia A.W.B. Powell, 1946 - (RHYTIDIDAE)
- traversi tararuaensis, Powelliphanta traversi tararuaensis (A.W.B. Powell, 1939) - (RHYTIDIDAE)
- traversiana, Fusiconus traversiana (E.A. Smith, 1875) - (CONIDAE)
- traversiana, Fumiconus traversiana (E.A. Smith, 1875) - syn of: Fusiconus traversiana (E.A. Smith, 1875) - (CONIDAE)
- traviesus, Janulus traviesus Castro, Yanes, García, Alonso & Ibáñez, 2014 - (GASTRODONTIDAE)
- travisama, Lopha travisama L.W. Stephenson † - (OSTREIDAE) (FOSSIL)
- travisensis, Cuphosolenus travisensis (Stanton, 1947 †) - (APORRHAIDAE) (FOSSIL)
- travisensis, Tylostoma travisensis A. Whitney, 1952 † - (TYLOSTOMATIDAE) (FOSSIL)
- travisii, Crenatula travisii W. Turton, 1834 - syn of: Crenatula picta (J.F. Gmelin, 1791) - (PTERIIDAE)
- travnicensis, Sarajana apfelbecki travnicensis P. Radoman, 1975 - (HYDROBIIDAE)
- traxleri, Mastus bielzi traxleri M. von Kimakowicz, 1890 - (ENIDAE)
- trayrae, Plagiodontes trayrae S.G.A. Jaeckel, 1950 - syn of: Cyclodontina trahyrae (S.G.A. Jaeckel, 1950) - (ODONTOSTOMIDAE)
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