- tusa, Mitra tusa L.A. Reeve, 1845 - syn of: Pusia tusum (L.A. Reeve, 1845) - (MITRIDAE)
- tusagasuganus, Drymaeus tusagasuganus H.A. Pilsbry, 1935 - (BULIMULIDAE)
- Tusayana, Genus Tusayana Stoyanow, 1948 (TUSAYANIDAE) (FOSSIL)
- TUSAYANIDAE Scarlato & Starobogatov, 1979 † - Family (BIVALVIA-HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-MODIOMORPHIDA [Order]-MODIOMORPHOIDEA [Super) (FOSSIL)
- tuscanum, Califadesma tuscanum L.R. Saul, 1989 † - (MESODESMATIDAE) (FOSSIL)
- tuscarorae, Costentalina tuscarorae S.D. Chistikov, 1982 - (ENTALINIDAE)
- tuschetica, Caucasica tuschetica (I.M. Likharev & Lejava, 1961) - (CLAUSILIIDAE)
- tushetica, Fruticocampylaea tushetica Walther, M.T. Neiber & B. Hausdorf, 2016 - (HYGROMIIDAE)
- Tuskaroria, Genus Tuskaroria A.V. Sysoev, 1988 (RAPHITOMIDAE)
- Tusoteuthis, Genus Tusoteuthis Logan, 1898 † (KELAENIDAE) (FOSSIL)
- tusum, Pusia tusum (L.A. Reeve, 1845) - (COSTELLARIIDAE)
- tuta, Cuna tuta J. Marwick, 1931 † - (CONDYLOCARDIIDAE) (FOSSIL)
- tuta, Cernuella tuta M. Paulucci, 1882 - syn of: Cernuella virgata (E.M. Da Costa, 1778) - (HYGROMIIDAE)
- tutamoensis, Arca tutamoensis J. Marwick, 1931 † - (ARCIDAE) (FOSSIL)
- tutamoensis, Melanella tutamoensis J. Marwick, 1931 † - (EULIMIDAE) (FOSSIL)
- tutamoensis, Plaxiphora tutamoensis (C.E.R. Bucknill, 1928 †) - (MOPALIIDAE) (FOSSIL)
- tutamoensis, Linucula tutamoensis J. Marwick, 1931 † - (NUCULIDAE) (FOSSIL)
- tutamoensis, Mormulasta tutamoensis (C.R. Laws, 1937 †) - (PYRAMIDELLIDAE) (FOSSIL)
- tutamoensis, Ringicula tutamoensis J. Marwick, 1931 † - (RINGICULIDAE) (FOSSIL)
- tutata, Mitrella tutata B.M. Landau, F. Da Silva & S.M. Heitz, 2016 † - (COLUMBELLIDAE) (FOSSIL)
- tutcheri, Brasilina tutcheri Buckman † - (MOLLUSCA INCERTAE SEDIS) (FOSSIL)
- Tutcheria, Genus Tutcheria Cox, 1946 † (CARDITIDAE) (FOSSIL)
- tutelina, Limacina tutelina Curry, 1986 † - syn of: Altaspiratella bearnensis Curry, 1982 † - (LIMACINIDAE) (FOSSIL)
- tuticorina, Afrophysema tuticorina (D.W. Taylor & E.A. Glover, 2005) - (LUCINIDAE)
- tuticorinensis, Chiton tuticorinensis H.C. Ray & P. Roychoudhury, 1968 - (CHITONIDAE)
- tuticorinensis, Quasiconus tuticorinensis (D. Röckel & W. Korn, 1990) - (CONIDAE)
- tuttawappana, Glyptorhagada tuttawappana G.A. Solem, 1992 - syn of: Glyptorhagada tattawuppana G.A. Solem, 1992 - (CAMAENIDAE)
- tutthum, Sphaeroceras tutthum (Buckman, 1921 †) - (SPHAEROCERATIDAE) (FOSSIL)
- tutubaensis, Marshallopsis tutubaensis A. Cecalupo & I. Perugia, 2013 - (CERITHIOPSIDAE)
- tutubaensis, Pyrgulina tutubaensis Peñas & Rolán, 2017 - (PYRAMIDELLIDAE)
- tutucorinensis, Chiton tutucorinensis H.C. Ray & P. Roychoudhury, 1968 - syn of: Chiton tuticorinensis H.C. Ray & P. Roychoudhury, 1968 - (CHITONIDAE)
- Tutufa, Genus Tutufa F.P. Jousseaume, 1881 (BURSIDAE)
- Tutufella, Subgenus Tutufa (Tutufella) A.G. Beu, 1981 (BURSIDAE)
- Tutuilana, Genus Tutuilana B. Hubendick, 1952 † (ASSIMINEIDAE) (FOSSIL)
- tutulata, Melanopsis tutulata P.M. Pallary, 1911 - (MELANOPSIDAE)
- tutulata minor, Melanopsis tutulata minor P.M. Pallary, 1927 - (MELANOPSIDAE)
- tutulus, Pupoides tutulus W.H. Benson - syn of: Pupoides coenopictus (F.W. Hutton, 1834) - (PUPILLIDAE)
- tuturewa, Cominella tuturewa (C.A. Fleming, 1943 †) - (BUCCINIDAE) (FOSSIL)
- tuvaense, Gastrocopta tuvaense Steklov, 1967 † - (GASTROCOPTIDAE) (FOSSIL)
- tuvaense, Odhneripisidium tuvaense Z.I. Izzatullaev & Y.I. Starobogatov, 1986 - syn of: Pisidium popovae Y.I. Starobogatov & E.A. Streletzkaja, 1967 - (SPHAERIIDAE)
- tuvaensis, Sibirenauta tuvaensis Y.I. Starobogatov, 1992 - (PHYSIDAE)
- tuvalicus, Cladiscites tuvalicus Diener, 1919 † - (CLADISCITIDAE) (FOSSIL)
- tuvalicus, Goniojuvavites tuvalicus Krystyn, 1982 † - (JUVAVITIDAE) (FOSSIL)
- Tuvapisidium, syn of: Genus Pisidium L. Pfeiffer, 1821 (SPHAERIIDAE)
- tuvuthaensis, Priceconcha tuvuthaensis G.A. Solem, 1973 - (ENDODONTIDAE)
- tuvuthaensis, Haliotis tuvuthaensis H.S. Ladd in H.S. Ladd & W.F.B. Hofmeister, 1945 - syn of: Haliotis clathrata L.A. Reeve, 1846 - (HALIOTIDAE)
- tuwaensis, Sibirenauta tuwaensis Y.I. Starobogatov & F. Zatrawkin, 1989 - (PHYSIDAE)
- tuxedniensis, Myophorella tuxedniensis Poulton, 1979 † - (MYOPHORELLIDAE) (FOSSIL)
- tuxedniensis, Sonninia tuxedniensis Imlay, 1964 † - (SONNINIIDAE) (FOSSIL)
- tuxensis, Abida secale tuxensis (C.A. Westerlund, 1902) - (CHONDRINIDAE)
- tuxtepecensis, Turritella tuxtepecensis Bose, 1906 † - (TURRITELLIDAE) (FOSSIL)
- tuxtlensis, Zonyalina tuxtlensis (J.C.H. Crosse & P.H. Fischer, 1863) - (ZONITIDAE)
- Tuyloceras, Genus Tuyloceras Foerste & Savage, 1927 † (LOWOCERATIDAE) (FOSSIL)
- tuytrieuensis, Besla tuytrieuensis E. Saurin, 1959 - (PYRAMIDELLIDAE)
- tvanovi, Vertorizoceras tvanovi P.A. Zhuravleva, 1972 † - syn of: Devonocheilus timanicus (Holzapfel, 1899 †) - (NAUTILIDA (unassigned)) (FOSSIL)
- tvishiensis, Eristavia tvishiensis Kakabadze, 1971 † - (HETEROCERATIDAE) (FOSSIL)
- twateana, Mohnia twateana R. Tiba, 1981 - syn of: Mohnia bella (H. Ozaki, 1958) - (BUCCINIDAE)
- tweedei, Perlisia tweedei (J.R. le B. Tomlin, 1938) - (PUPINIDAE)
- tweedianum, Haustellum tweedianum (J.H. Macpherson, 1962) - (MURICIDAE)
- tweedianus, Murex tweedianus J.H. Macpherson, 1962 - syn of: Haustellum tweedianum (J.H. Macpherson, 1962) - (MURICIDAE)
- tweediei, Platymma tweediei J.R. le B. Tomlin, 1938 - (ARIOPHANTIDAE)
- tweediei, Sinoennea tweediei J.R. le B. Tomlin, 1948 - (DIAPHERIDAE)
- tweediensis, Haustellum tweediensis J.H. Macpherson, 1959 - syn of: Haustellum tweedianum (J.H. Macpherson, 1962) - (MURICIDAE)
- tweedledee, Pyruclia tweedledee B.M. Landau & al., 2012 † - (CANCELLARIIDAE) (FOSSIL)
- tweedledum, Pyruclia tweedledum B.M. Landau & al., 2012 † - (CANCELLARIIDAE) (FOSSIL)
- twelvetreesi, Keeneia twelvetreesi Dun, 1913 † - (PLATYCERATIDAE) (FOSSIL)
- twenhoensis, Bradybaena twenhoensis W.X. Ping & T.C. Yen, 1932 - (BRADYBAENIDAE)
- twilabratcherae, Hemilienardia twilabratcherae Wiedrick, 2017 - (RAPHITOMIDAE)
- twilae, Epifungium twilae (E. Gittenberger & J. Goud, 2000) - (EPITONIIDAE)
- twilae, Terebra twilae P. Bouchet, 1983 - (TEREBRIDAE)
- twinensis, Acesta twinensis J.W. Durham † - (LIMIDAE) (FOSSIL)
- twinensis, Macoma twinensis Clark, 1925 † - (TELLINIDAE) (FOSSIL)
- twinhoensis, Procerites twinhoensis Arkell † - (PERISPHINCTIDAE) (FOSSIL)
- twiningi, Caestocorbula twiningi M. Glibert & L. van de Poel, 1966 † - (CORBULIDAE) (FOSSIL)
- twomeyi, Zilchogyra twomeyi (J.J. Parodíz, 1954) - (HELICODISCIDAE)
- tyaughtonae, Catella tyaughtonae McLearn, 1942 † - (PARALLELODONTIDAE) (FOSSIL)
- tyaughtonae, Pecten tyaughtonae McLearn, 1942 † - (PECTINIDAE) (FOSSIL)
- Tychobrachea, syn of: Genus Tychobrahea Horný, 1992 † (TYCHOBRAHEIDAE) (FOSSIL)
- Tychobrahea, Genus Tychobrahea Horný, 1992 † (TYCHOBRAHEIDAE) (FOSSIL)
- TYCHOBRAHEIDAE Horný, 1992 † - Family (GASTROPODA-VETIGASTROPODA [Subclass]-TROCHOIDEA [Superfamily]) (FOSSIL)
- Tychocardia, syn of: Genus Glossus G.S. Poli, 1795 (GLOSSIDAE)
- Tychonia, Genus Tychonia de Koninck, 1881 † (ANOMPHALIDAE) (FOSSIL)
- tychonis, Seymourites tychonis J.P.J. Ravn, 1911 † - (KOSMOCERATIDAE) (FOSSIL)
- tydemani, Pseudovertagus tydemani M.M. Schepman, 1909 - syn of: Pseudovertagus nobilis (L.A. Reeve, 1855) - (CERITHIIDAE)
- tydemani, Lucilina tydemani (H.F. Nierstrasz, 1905) - (CHITONIDAE)
- tydemani, Epitonium tydemani M.M. Schepman, 1909 - syn of: Epitonium catanuense (J. de C. Sowerby, 1844) - (EPITONIIDAE)
- tydemani, Cerithiella tydemani M.M. Schepman, 1909 - syn of: Pseudovertagus nobilis (L.A. Reeve, 1855) - (NEWTONIELLIDAE)
- tydemani, Hyalopecten tydemani (H.H. Dijkstra, 1990) - (PECTINIDAE)
- tydemani, Eulimella tydemani J.J. Van Aartsen, E. Gittenberger & J. Goud, 1998 - (PYRAMIDELLIDAE)
- tydeus, Lolliguncula tydeus T.F. Brakoniecki, 1980 - syn of: Lolliguncula panamensis S.S. Berry, 1911 - (LOLIGINIDAE)
- tyermani, Glabella tyermani (F.P. Marrat, 1876) - (MARGINELLIDAE)
- tyermani, Marginella tyermani F.P. Marrat, 1876 - syn of: Glabella tyermani (F.P. Marrat, 1876) - (MARGINELLIDAE)
- tyersensis, Homoctenowakia tyersensis Alberti, 1997 † - (PARANOWAKIIDAE) (FOSSIL)
- tyhanica, Anodonta tyhanica W. Kobelt & F. Haas, 1911 - syn of: Anodonta cygnea (C. Linnaeus, 1758) - (UNIONIDAE)
- tyla, Coelocentrum tyla F.G. Thompson, 1968 - (UROCOPTIDAE)
- Tylastralium, syn of: Genus Bolma A. Risso, 1826 (TURBINIDAE)
- Tylaxis, Subgenus Cochliolepis (Tylaxis) H.A. Pilsbry, 1953 † (TORNIDAE) (FOSSIL)
- tylerae, Pyrene tylerae E. Griffith & E. Pidgeon, 1834 - syn of: Pardalinops testudinaria (J.H.F. Link, 1807) - (COLUMBELLIDAE)
- tylerae, Columbella tylerae E. Griffith & E. Pidgeon, 1834 - syn of: Pardalinops testudinaria (J.H.F. Link, 1807) - (COLUMBELLIDAE)
- tyleri, Bostryx tyleri W.H. Dall, 1912 - (BULIMULIDAE)
- tyleri, Odostomia tyleri W.H. Dall & P. Bartsch, 1909 - (PYRAMIDELLIDAE)
- tyleri, Varicospira tyleri (H. Adams & A. Adams, 1864) - (ROSTELLARIIDAE)
- Tyleria, syn of: Genus Sphenia W.H. Turton, 1822 (MYIDAE)
- Tyliotella, syn of: Genus Tylotiella T. Habe, 1958 (DRILLIIDAE)
- tyloacron, Ditropopsis tyloacron J.J. Vermeulen, T.S. Liew & M. Schilthuizen, 2015 - (CYCLOPHORIDAE)
- Tylocassis, syn of: Genus Semicassis O.A.L. Mörch, 1852 (CASSIDAE)
- tylocheilos, Diplommatina tylocheilos J.J. Vermeulen, T.S. Liew & M. Schilthuizen, 2015 - (DIPLOMMATINIDAE)
- Tylochilus, syn of: Genus Cerithidea W.J. Swainson, 1840 (POTAMIDIDAE)
- tylodacra, Rimella tylodacra O. Böttger, 1883 † - (RIMELLIDAE) (FOSSIL)
- Tylodina, Genus Tylodina C.S. Rafinesque, 1819 (TYLODINIDAE)
- Tylodinella, syn of: Genus Tylodina C.S. Rafinesque, 1819 (TYLODINIDAE)
- TYLODINIDAE Gray, 1847 - Family (GASTROPODA-HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-UMBRACULIDA [Order]-UMBRACULOIDEA [Superfamily])
- Tylodiscoceras, Genus Tylodiscoceras Miller & Collinson, 1950 † (KONINCKIOCERATIDAE) (FOSSIL)
- tyloessa, Crassispira tyloessa W.P. Woodring, 1970 † - (PSEUDOMELATOMIDAE) (FOSSIL)
- Tylomelania, Subgenus Sulcospira (Tylomelania) P.B. Sarasin & K.F. Sarasin, 1898 (PACHYCHILIDAE)
- Tylonautilus, Genus Tylonautilus Pringle & Jackson, 1928 † (GZHELOCERATIDAE) (FOSSIL)
- Tylophora, syn of: Genus Sollea Dahmer, 1936 † (MODIOMORPHIDAE) (FOSSIL)
- Tylopoma, Genus Tylopoma Brusina, 1882 † (BITHYNIIDAE) (FOSSIL)
- tylopomoides, Ferebithynia vadaszi tylopomoides (W.A. Wenz, 1931 †) - (BITHYNIIDAE) (FOSSIL)
- Tylorthoceras, Genus Tylorthoceras Miller, 1932 † (RUTOCERATIDAE) (FOSSIL)
- Tylospira, Subgenus Struthiolaria (Tylospira) G.F. Harris, 1897 (STRUTHIOLARIIDAE)
- Tylostoma, Genus Tylostoma Sharpe, 1849 † (TYLOSTOMATIDAE) (FOSSIL)
- TYLOSTOMATIDAE Stoliczka, 1868 † - Family (GASTROPODA-CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-STROMBOIDEA [Superfamily]) (FOSSIL)
- tylota, Glatziella tylota Ruan, 1981 † - (GLATZIELLIDAE) (FOSSIL)
- Tylotia, syn of: Genus Clavus P.D. Montfort, 1810 (DRILLIIDAE)
- Tylotiella, Genus Tylotiella T. Habe, 1958 (DRILLIIDAE)
- Tylotoechus, Subgenus Pupina (Tylotoechus) W. Kobelt & O.F. von Möllendorff, 1897 (PUPINIDAE)
- Tylotoma, syn of: Genus Tulotoma S.S. Haldeman, 1840 (VIVIPARIDAE)
- Tylotrochus, Genus Tylotrochus Koken, 1896 † (PROCONULIDAE) (FOSSIL)
- tylotus, Capulus tylotus Whidborne, 1891 † - syn of: Spinyplatyceras tylotus (Whidborne, 1891 †) - (CAPULIDAE) (FOSSIL)
- tylotus, Spinyplatyceras tylotus (Whidborne, 1891 †) - (PLATYCERATIDAE) (FOSSIL)
- Tylozone, Genus Tylozone Linsley , 1968 † (GOSSELETINIDAE) (FOSSIL)
- tymiensis, Cincinna tymiensis Y.I. Starobogatov, 1985 - (VALVATIDAE)
- tympama, Macluritella tympama Kobayashi, 1955 † - syn of: Macluritella uniangulata (J.W. Hall, 1847 †) - (MACLURITIDAE) (FOSSIL)
- tympama, Burnesella tympama J.W. Hall, 1847 † - syn of: Macluritella uniangulata (J.W. Hall, 1847 †) - (OPHILETIDAE) (FOSSIL)
- Tympanoceras, Genus Tympanoceras Ruzhencev , 1958 † (CRAVENOCERATIDAE) (FOSSIL)
- Tympanotomus, syn of: Genus Tympanotonos E. Klein in H.C.F. Schumacher, 1817 (POTAMIDIDAE)
- Tympanotonos, Genus Tympanotonos E. Klein in H.C.F. Schumacher, 1817 (POTAMIDIDAE)
- Tympanotonus, syn of: Genus Tympanotonos E. Klein in H.C.F. Schumacher, 1817 (POTAMIDIDAE)
- tyna, Eselaevitrigonia tyna Skwarko, 1981 † - (TRIGONIIDAE) (FOSSIL)
- tynani, Wellsites tynani House & Kirchgasser, 1993 † - (TRIAINOCERATIDAE) (FOSSIL)
- Tyndaria, syn of: Genus Tindaria L.M.D. Bellardi, 1875 (TINDARIIDAE)
- tyosenica, Diplommatina tyosenica J.T. Kuroda & M. Miyanaga, 1939 - (DIPLOMMATINIDAE)
- tyosenica, Vicaryella tyosenica Yabe & K.M. Hatai, 1938 † - (POTAMIDIDAE) (FOSSIL)
- tyosenica, Zoogenetes tyosenica J.T. Kuroda & M. Hukuda, 1944 - (VALLONIIDAE)
- tyosenica griseum, Diplommatina tyosenica griseum J.T. Kuroda & M. Miyanaga, 1939 - (DIPLOMMATINIDAE)
- tyosiensis, Panopea tyosiensis H. Ozaki, 1952 - syn of: Panopea abrupta (T.A. Conrad, 1849) - (HIATELLIDAE)
- typa, Cataschisma typa R.M. Branson, 1909 † - (GOSSELETINIDAE) (FOSSIL)
- typa, Cadomia typa Tromelin, 1877 † - (MALLETIIDAE) (FOSSIL)
- typa, Throopella typa Greger, 1933 † - (SCAPHOPODA INCERTAE SEDIS) (FOSSIL)
- typa, Lithodomina typa L. Waagen, 1881 † - (UNIONIDAE) (FOSSIL)
- typha, Strigatella typha L.A. Reeve, 1845 - (MITRIDAE)
- typhae, Onchidium typhae F. Buchannan, 1800 - (ONCHIDIIDAE)
- Typhina, Subgenus Typhis (Typhina) F.P. Jousseaume, 1880 (MURICIDAE)
- Typhinellus, Genus Typhinellus F.P. Jousseaume, 1880 (MURICIDAE)
- typhioides, Muricopsis typhioides (C. Mayer, 1869 †) - (MURICIDAE) (FOSSIL)
- Typhis, Genus Typhis P.D. Montfort, 1810 (MURICIDAE)
- Typhisala, Genus Typhisala F.P. Jousseaume, 1881 (MURICIDAE)
- Typhisopsis, Subgenus Typhis (Typhisopsis) F.P. Jousseaume, 1880 (MURICIDAE)
- Typhlochiton, syn of: Genus Chaetopleura R.J. Shuttleworth, 1853 (CHAETOPLEURIDAE)
- Typhlodaphne, Genus Typhlodaphne A. Powell, 1951 (BORSONIIDAE)
- Typhlomangelia, Genus Typhlomangelia G.O. Sars, 1878 (BORSONIIDAE)
- Typhlosyrinx, Genus Typhlosyrinx K.H.J. Thiele, 1925 (RAPHITOMIDAE)
- Typhobia, syn of: Genus Tiphobia E.A. Smith, 1880 (PALUDOMIDAE)
- typhoides, Poirieria typhoides (C. Mayer, 1869 †) - (MURICIDAE) (FOSSIL)
- typhon, Rhiglyphostoma typhon (J. Gardner, 1938 †) - (CLATHURELLIDAE) (FOSSIL)
- typhon, Kioconus typhon (R.N. Kilburn, 1975) - (CONIDAE)
- typhonota, Eucithara typhonota (J.C. Melvill & R. Standen, 1901) - (MANGELIIDAE)
- typica, Ozarkina typica Ulrich & al., 1931 † - (ARCHAEOGASTROPODA (UNASSIGNED)) (FOSSIL)
- typica, Plesiocyprina typica (de Loriol 1901) † - (ARCTICIDAE) (FOSSIL)
- typica, Xesta citrina typica H.A. Pilsbry, 1889 - (ARIOPHANTIDAE)
- typica, Cancellaria typica F. Paetel, 1888 - (CANCELLARIIDAE)
- typica, Cancellaria typica H. Strebel, 1908 - syn of: Paradmete fragillima (R.B. Watson, 1882) - (CANCELLARIIDAE)
- typica, Septocardia typica J.W. Hall & R.P. Whitfield, 1877 † - (CARDIIDAE) (FOSSIL)
- typica, Cuspidaria typica G.D. Nardo, 1847 - syn of: Cuspidaria cuspidata (A.G. Olivi, 1792) - (CUSPIDARIIDAE)
- typica, Toledonia typica (K.H.J. Thiele, 1904) - (DIAPHANIDAE)
- typica, Laemodonta typica (C.B. Adams, 1854) - (ELLOBIIDAE)
- typica, Eopteria typica Billings, 1865 † - syn of: Eopteria richardsoni Billings, 1865 † - (EOPTERIIDAE) (FOSSIL)
- typica, Woodsella typica B. Wade, 1926 † - (FASCIOLARIIDAE) (FOSSIL)
- typica, Goniaeolis typica G.O. Sars, 1861 - (GONIAEOLIDIDAE)
- typica, Goniodoris typica G.O. Sars, 1859 - (GONIODORIDIDAE)
- typica, Cataschisma typica R.M. Branson, 1909 † - (GOSSELETINIDAE) (FOSSIL)
- typica, Helix typica W. Kobelt, 1906 - syn of: Helix pomatia C. Linnaeus, 1758 - (HELICIDAE)
- typica, Endocostea typica Whitfield 1877 † - (INOCERAMIDAE) (FOSSIL)
- typica, Rissopsis typica A. Garrett, 1873 - (IRAVADIIDAE)
- typica, Pseudoeuchasma typica T. Kobayashi, 1933 † - (ISCHYRINIIDAE) (FOSSIL)
- typica, Janthina typica (H.G. Bronn, 1861 †) - (JANTHINIDAE) (FOSSIL)
- typica, Hartungia typica H.G. Bronn, 1861 † - syn of: Janthina typica (H.G. Bronn, 1861 †) - (JANTHINIDAE) (FOSSIL)
- typica, Berthelinia typica (J.H. Gatliff & C.J. Gabriel, 1911) - (JULIIDAE)
- typica, Radix andersoniana typica Subba Rao, 1989 - (LYMNAEIDAE)
- typica, Mulinia typica J.E. Gray, 1837 - syn of: Mulinia edulis (King, 1831) - (MACTRIDAE)
- typica, Eucithara typica (E.A. Smith, 1884) - (MANGELIIDAE)
- typica, Spathella typica J.W. Hall, 1885 † - (MODIOMORPHIDAE) (FOSSIL)
- typica, Eomonotis typica (Kiparisova, 1936 †) - (MONOTIDAE) (FOSSIL)
- typica, Purpura typica R.W. Dunker, 1857 - syn of: Agnewia tritoniformis (H.M.D. de Blainville, 1833) - (MURICIDAE)
- typica, Neolepton typica J.T. Kuroda, 1959 - (NEOLEPTONIDAE)
- typica, Micropolia typica C.F. Laseron, 1953 - (NEOLEPTONIDAE)
- typica, Devononerita typica (Radabaugh, 1942 †) - (NERITOPSIDAE) (FOSSIL)
- typica, Lamellileda typica B.C. Cotton, 1930 - (NUCULANIDAE)
- typica, Palaeacmaea typica J.W. Hall & R.P. Whitfield, 1872 † - (PALAEACMAEIDAE) (FOSSIL)
- typica, Polycera typica I.C. Thompson, 1840 - syn of: Polycera quadrilineata (O.F. Müller, 1776) - (POLYCERIDAE)
- typica, Stylopsis typica A. Adams, 1860 - (PYRAMIDELLIDAE)
- typica, Chrysallida typica (C.F. Laseron, 1959) - (PYRAMIDELLIDAE)
- typica, Granigyra typica (K.H.J. Thiele, 1925) - (SEGUENZIOIDEA (UNASSIGNED))
- typica, Sepia typica (J.J.S. Steenstrup, 1875) - (SEPIIDAE)
- typica, Schizopea typica Ulrich & al., 1931 † - (SINUOPEIDAE) (FOSSIL)
- typica, Geomelania typica (C.B. Adams, 1850) - (TRUNCATELLIDAE)
- typica, Zhifangia typica H.X. Liu, 1980 † - (UNIONIDA (UNASSIGNED)) (FOSSIL)
- typica, Petricola typica I.H. Jonas, 1844 - syn of: Choristodon robustus (G.B. I Sowerby, 1834) - (VENERIDAE)
- typica, Petricola typica G.B. III Sowerby, 1892 - syn of: Petricola bicolor G.B. II Sowerby, 1854 - (VENERIDAE)
- typica, Voluta typica W.H. Dall, 1907 - syn of: Voluta musica C. Linnaeus, 1758 - (VOLUTIDAE)
- typica, Zidona dufresnei typica F. Lahille, 1895 - (VOLUTIDAE)
- typica, Schwartziella typica E. Rolán & L. Luque, 2000 - (ZEBINIDAE)
- typica pygmaea, Geomelania typica pygmaea C.B. Adams, 1850 - syn of: Geomelania typica (C.B. Adams, 1850) - (TRUNCATELLIDAE)
- typicale, Trizonoceras typicale Girty, 1909 † - (DIMORPHOCERATIDAE) (FOSSIL)
- typicalis, Pseudotechnophorus typicalis T. Kobayashi, 1933 † - (ISCHYRINIIDAE) (FOSSIL)
- typicalis, Cymatonota typicalis Ulrich, 1894 † - (MODIOMORPHIDAE) (FOSSIL)
- typicalis, Sinuopea typicalis Butts, 1926 † - (SINUOPEIDAE) (FOSSIL)
- typicum, Buccinum typicum W.H. Dall, 1885 - syn of: Buccinum angulosum J.E. Gray, 1839 - (BUCCINIDAE)
- typicum, Keilostoma typicum Briart & Cornet, 1887 † - (DIASTOMATIDAE) (FOSSIL)
- typicum, Trachysma typicum G.O. Sars, 1878 - syn of: Torellia delicata (R.A. Philippi, 1844) - (PENDROMIDAE)
- typicum, Devononema typicum Fraunfelter, 1973 † - (PLATYCERATIDAE) (FOSSIL)
- typicum, Styloptygma typicum (G.W. Tryon, 1886) - (PYRAMIDELLIDAE)
- typicum, Altivasum typicum C. Hedley, 1916 - syn of: Altivasum flindersi (J.C. Verco, 1914) - (TURBINELLIDAE)
- typicum, Choristodon typicum I.H. Jonas, 1844 - syn of: Choristodon robustus (G.B. I Sowerby, 1834) - (VENERIDAE)
- typicus, Xinjiangoconus typicus C. Chen, 1988 † - (AULACOCERATIDAE) (FOSSIL)
- typicus, Melampus typicus H. Adams & A. Adams, 1854 - (ELLOBIIDAE)
- typicus, Fascinus typicus C. Hedley, 1903 - (FASCIOLARIIDAE)
- typicus, Clypites typicus L. Waagen, 1895 † - (HEDENSTROEMIIDAE) (FOSSIL)
- typicus, Dolikephalites typicus C.H. Blake, 1905 † - (MACROCEPHALITIDAE) (FOSSIL)
- typicus, Kargalites typicus (Ruzhentsev, 1933 †) - (MARATHONITIDAE) (FOSSIL)
- typicus, Modiolus typicus E. Forbes, 1846 † - (MYTILIDAE) (FOSSIL)
- typicus, Octopus minor typicus M. Sasaki, 1929 - (OCTOPODIDAE)
- typicus, Dichotomites typicus Spath, 1924 † - (POLYPTYCHITIDAE) (FOSSIL)
- typicus, Soleniscus typicus F.B. Meek & A.H. Worthen, 1860 † - (SOLENISCIDAE) (FOSSIL)
- typicus dolius, Dolikephalites typicus dolius (S.S. Buckman †) - (MACROCEPHALITIDAE) (FOSSIL)
- typinsana, Aegista typinsana A. Adams & L.A. Reeve, 1850 - syn of: Aegista oculus (L. Pfeiffer, 1850) - (BRADYBAENIDAE)
- typum, Tornoceras typum (C.L.F. von Sandberger, 1851 †) - (TORNOCERATIDAE) (FOSSIL)
- typus, Calliostoma typus G.D. Nardo, 1847 - syn of: Calliostoma zizyphinum (C. Linnaeus, 1758) - (CALLIOSTOMATIDAE)
- typus, Cuspidaria typus G.D. Nardo, 1840 - syn of: Cuspidaria cuspidata (A.G. Olivi, 1792) - (CUSPIDARIIDAE)
- typus, Gonyodiscus typus L. Waagen, 1895 † - syn of: Hemiprionites typus (L. Waagen, 1895 †) - (DISCIDAE) (FOSSIL)
- typus, Plesechioceras typus Buckman, 1927 † - syn of: Plesechioceras delicatum (Buckman, 1914 †) - (ECHIOCERATIDAE) (FOSSIL)
- typus, Kymatites typus L. Waagen, 1895 † - (GYRONITIDAE) (FOSSIL)
- typus, Loliolus typus J.J.S. Steenstrup, 1856 - syn of: Loliolus hardwickei (J.E. Gray, 1849) - (LOLIGINIDAE)
- typus, Unicornus typus P.D. Montfort, 1810 - syn of: Acanthina monodon (P.S. Pallas, 1774) - (MURICIDAE)
- typus, Hemiprionites typus (L. Waagen, 1895 †) - (PRIONITIDAE) (FOSSIL)
- typus, Infundibulum typus P.D. Montfort, 1810 - syn of: Infundibulum concavum (J.F. Gmelin, 1791) - (TROCHIDAE)
- typus, Trochomorpha typus H.B. Baker, 1938 - (TROCHOMORPHIDAE)
- typus, Scaphella typus T.A. Conrad, 1866 † - (VOLUTIDAE) (FOSSIL)
- tyranniformis, Reineckeia tyranniformis Spath, 1928 † - (REINECKEIIDAE) (FOSSIL)
- Tyrannites, Genus Tyrannites Cariou, 1984 † (AMMONOIDEA (UNASSIGNED)) (FOSSIL)
- Tyrannoberingius, Genus Tyrannoberingius Marincovich, 1981 † (BUCCINIDAE) (FOSSIL)
- Tyrannodoris, Genus Tyrannodoris Willan & Chang, 2017 (POLYCERIDAE)
- Tyrannophaedusa, Genus Tyrannophaedusa H.A. Pilsbry, 1901 (CLAUSILIIDAE)
- Tyrannozaptyx, Genus Tyrannozaptyx F. Käufel, 1930 (CLAUSILIIDAE)
- tyrannus, Nautilus tyrannus Barrande, 1865 - (NAUTILIDAE)
- tyri, Goniophora tyri Liljedahl, 1994 † - (MODIOMORPHIDAE) (FOSSIL)
- tyria, Angaria tyria (L.A. Reeve, 1842) - (ANGARIIDAE)
- tyria, Anomia tyria L.A. Reeve, 1859 - syn of: Anomia ephippium C. Linnaeus, 1758 - (ANOMIIDAE)
- tyrianthina, Acanthina tyrianthina S.S. Berry, 1957 - syn of: Mexacanthina lugubris (J. de C. Sowerby, 1821) - (MURICIDAE)
- tyrianthina, Neosimnia tyrianthina S.S. Berry, 1960 - syn of: Simnia arcuata (L.A. Reeve, 1865) - (OVULIDAE)
- tyriense, Strandoceras tyriense (E. Strand, 1934 †) - (CYRTOGOMPHOCERATIDAE) (FOSSIL)
- tyriense, Protophragmoceras tyriense E. Strand, 1934 † - syn of: Strandoceras tyriense (E. Strand, 1934 †) - (PHRAGMOCERATIDAE) (FOSSIL)
- tyriense, Sactoceras tyriense E. Strand , 1934 † - (POLYDESMIIDAE) (FOSSIL)
- Tyrinna, Genus Tyrinna L.S.R. Bergh, 1898 (CHROMODORIDIDAE)
- Tyrioceras, Genus Tyrioceras Strand, 1933 † (SINOCERATIDAE) (FOSSIL)
- tyrnovense, Procerithium tyrnovense A.V. Guzhov, 2004 † - (PROCERITHIIDAE) (FOSSIL)
- Tyrnoviella, Genus Tyrnoviella Guzhov, 2004 † (CRYPTAULACIDAE) (FOSSIL)
- tyro, Lioglyphostoma tyro J. Gardner, 1937 † - (PSEUDOMELATOMIDAE) (FOSSIL)
- tyroensis, Orbobactrites tyroensis Mapes, 1979 † - (PARABACTRITIDAE) (FOSSIL)
- tyroi, Mastigoteuthis tyroi M.A. Salcedo-Vargas, 1997 - (MASTIGOTEUTHIDAE)
- tyroi, Macromphalus tyroi H.J. Hoenselaar & R.G. Moolenbeek, 1994 - (VANIKORIDAE)
- tyrolensis, Neoeunema tyrolensis (E.A.L. Kittl, 1891 †) - (EUCYCLIDAE) (FOSSIL)
- tyrolensis, Eunema tyrolensis E.A.L. Kittl, 1891 † - syn of: Neoeunema tyrolensis (E.A.L. Kittl, 1891 †) - (LOPHOSPIRIDAE) (FOSSIL)
- tyrolensis, Amauropsis tyrolensis Laube, 1868 † - (NATICIDAE) (FOSSIL)
- tyrolensis, Katosira tyrolensis E.A.L. Kittl, 1894 † - (SETTSASSIIDAE) (FOSSIL)
- tyronensis, Orthoceras tyronensis Foerste, 1912 † - syn of: Proteoceras tyronensis (Foerste, 1912 †) - (ORTHOCERATIDAE) (FOSSIL)
- tyronensis, Proteoceras tyronensis (Foerste, 1912 †) - (PROTEOCERATIDAE) (FOSSIL)
- tyroni, Epitonium tyroni M.E.A. de Boury, 1913 - syn of: Epitonium tryoni (M.E.A. de Boury, 1913) - (EPITONIIDAE)
- Tyronia, Genus Tyronia Stimpson, 1865 † (HYDROBIIDAE) (FOSSIL)
- tyrotarichoides, Manaria tyrotarichoides Fraussen & Stahlschmidt, 2016 - (BUCCINIDAE)
- tyrrelli, Euomphalopterus tyrrelli Parks, 1913 † - syn of: Euomphalopterus limatoidea Kindle, 1903 † - (EUOMPHALIDAE) (FOSSIL)
- tyrrelli, Buechelia tyrrelli (J.J.F. Whiteaves, 1892 †) - (GOSSELETINIDAE) (FOSSIL)
- tyrrelli, Lyrodesma tyrrelli Lamont † - (LYRODESMATIDAE) (FOSSIL)
- tyrrelli, Raphistoma tyrrelli J.J.F. Whiteaves, 1892 † - syn of: Buechelia tyrrelli (J.J.F. Whiteaves, 1892 †) - (RAPHISTOMATIDAE) (FOSSIL)
- tyrrena, Tandonia tyrrena M. Lessona & C. Pollonera, 1882 - syn of: Tandonia sowerbyi (A.E.J. Férussac, 1823) - (MILACIDAE)
- tyrrhena, Galeodea tyrrhena J.F. Gmelin, 1791 - syn of: Galeodea rugosa (C. Linnaeus, 1771) - (CASSIDAE)
- tyrrhena, Haliella tyrrhena S.I. Di Geronimo & R. La Perna, 1999 † - (EULIMIDAE) (FOSSIL)
- tyrrhena, Cernuella tyrrhena C. Pollonera, 1905 - syn of: Cernuella cisalpina (E.A. Rossmässler, 1837) - (HYGROMIIDAE)
- tyrrhena, Granulina tyrrhena S.I. Di Geronimo & R. La Perna, 1999 - syn of: Haliella chilensis - (MARGINELLIDAE)
- tyrrhena atlantica, Galeodea tyrrhena atlantica F. Settepassi, 1970 - syn of: Galeodea rugosa (C. Linnaeus, 1771) - (CASSIDAE)
- tyrrhena dentata, Galeodea tyrrhena dentata F. Settepassi, 1970 - syn of: Galeodea rugosa (C. Linnaeus, 1771) - (CASSIDAE)
- tyrrhena elongata, Galeodea tyrrhena elongata F. Settepassi, 1970 - syn of: Galeodea rugosa (C. Linnaeus, 1771) - (CASSIDAE)
- tyrrhena soluta, Galeodea tyrrhena soluta F. Settepassi, 1970 - syn of: Galeodea rugosa (C. Linnaeus, 1771) - (CASSIDAE)
- Tyrrhenaria, Subgenus Helix (Tyrrhenaria) P. Hesse, 1918 (HELICIDAE)
- Tyrrheniberus, Genus Tyrrheniberus W. Kobelt, 1904 (HELICIDAE)
- tyrrhenicum, Callostracon tyrrhenicum (C. Smriglio & P. Mariottini, 1996) - (ACTEONIDAE)
- tyrrhenicum, Colostracon tyrrhenicum C. Smriglio & P. Mariottini, 1996 - syn of: Callostracon tyrrhenicum (C. Smriglio & P. Mariottini, 1996) - (ACTEONINIDAE)
- Tyrrheniella, syn of: Genus Tyrrheniellina F.L. Giusti & G. Manganelli, 1992 (HYGROMIIDAE)
- Tyrrheniellina, Genus Tyrrheniellina F.L. Giusti & G. Manganelli, 1992 (HYGROMIIDAE)
- Tyrrhenoturris, syn of: Genus Fusiturris K.H.J. Thiele, 1929 (CLAVATULIDAE)
- tyrrhenum, Buccinum tyrrhenum J.F. Gmelin, 1791 - syn of: Galeodea rugosa (C. Linnaeus, 1771) - (BUCCINIDAE)
- tyrrhenus globosior, Galeodea tyrrhenus globosior G.S. Coen, 1920 - syn of: Galeodea rugosa (C. Linnaeus, 1771) - (CASSIDAE)
- tyrsoecus, Promathildia tyrsoecus E.A.L. Kittl, 1894 † - (GORDENELLIDAE) (FOSSIL)
- Tyrsoecus, Genus Tyrsoecus Kittl, 1892 † (LOXONEMATIDAE) (FOSSIL)
- tyrtowii, Hedylopsis tyrtowii A. Kowalevsky, 1900 - syn of: Parhedyle tyrtowii (A. Kowalevsky, 1900) - (HEDYLOPSIDAE)
- tyrtowii, Parhedyle tyrtowii (A. Kowalevsky, 1900) - (PARHEDYLIDAE)
- tyrtowii, Microhedyle tyrtowii A. Kowalevsky, 1900 - syn of: Parhedyle tyrtowii (A. Kowalevsky, 1900) - (PARHEDYLIDAE)
- tytha, Didianema tytha W.P. Woodring, 1928 † - (SKENEIDAE) (FOSSIL)
- tytthum, Siphonodentalium tytthum R.B. Watson, 1879 - (GADILIDAE)
- tzankovi, Protacrioceras tzankovi Dimitrova, 1967 † - (EMERICICERATIDAE) (FOSSIL)
- tzankovi, Tzankoviceras tzankovi Manolov, 1962 † - (LEPTOCERATOIDIDAE) (FOSSIL)
- tzankovi, Conohibolithes tzankovi (Stoyanova-Vergilova, 1965 †) - (MESOHIBOLITHIDAE) (FOSSIL)
- Tzankoviceras, Subgenus Hamulinites (Tzankoviceras) Manolov, 1962 † (LEPTOCERATOIDIDAE) (FOSSIL)
- tzekovi, Pseudorientalia tzekovi P. Glöer & D.G. Georgiev, 2012 - (HYDROBIIDAE)
- tzotnei, Audouliceras tzotnei (Rouchadze, 1933 †) - (ANCYLOCERATIDAE) (FOSSIL)
- tzotnei, Colchidites tzotnei Rouchadze, 1933 † - syn of: Martelites tzotnei (Rouchadze, 1933 †) - (ANCYLOCERATIDAE) (FOSSIL)
- tzotnei, Martelites tzotnei (Rouchadze, 1933 †) - (HETEROCERATIDAE) (FOSSIL)
- tzvetaevae, Uralorthoceras tzvetaevae Shimansky † - (PSEUDORTHOCERATIDAE) (FOSSIL)
- tzvetkovi, Taulimax tzvetkovi I.M. Likharev & A. Wiktor, 1980 - (LIMACIDAE)
- tzwetaevae, Uralorthoceras tzwetaevae Shimanskiy, 1951 † - (PSEUDORTHOCERATIDAE) (FOSSIL)
- tzwetaevi, Loxonema tzwetaevi C. Gemmellaro, 1889 † - (LOXONEMATIDAE) (FOSSIL)
- tzwetkovi, Fruticicola tzwetkovi K.K. Uvalieva & E.S. Sobolev, 1973 - (BRADYBAENIDAE)
- tzwetkovi, Zenobiella tzwetkovi P.V. Matiokin, 1966 - syn of: Archaica heptapotamica (W.A. Lindholm, 1927) - (HYGROMIIDAE)
aaa
abx
ack
acy
adn
aer
afs
ajd
alc
alj
alu
amc
ams
and
anh
anp
anu
apl
arb
ard
arh
ars
asr
atl
atu
aus
aut
bab
baj
bao
bas
baw
bem
bes
bid
bim
bit
bli
bom
bos
bov
bre
bri
bry
bum
bys
caa
cak
cam
cao
cas
cau
cem
ces
che
chk
chy
cio
cle
cob
coh
com
con
coo
cos
cot
cre
cri
cru
cud
cuo
cuy
cym
daa
dam
dav
ded
dem
deo
det
dib
dih
dir
dit
dom
dos
duc
duq
eag
ecr
egg
elf
elp
enh
eov
erf
erz
eud
eus
exb
exl
exy
faa
fan
fat
fes
fim
fle
flu
fos
fre
fuf
fur
fut
gaa
gam
gav
geo
gie
gis
gle
glu
goo
gre
gru
gug
guz
haa
ham
has
heb
hem
hes
hif
his
hom
hou
hun
hye
iac
ilm
imt
ind
inf
ing
int
inu
irm
isp
jaa
jao
jaw
joi
juk
kaa
kao
kaz
kes
kio
koc
kot
kuk
laa
lad
laf
lan
las
lau
lec
leo
leq
lew
lim
lio
liu
loo
lub
lun
luv
maa
mad
mah
mam
mao
mas
mav
mee
mem
mes
mey
mid
min
mio
mit
moe
moo
mos
mum
mut
nab
nao
nav
nel
neq
nex
nih
niu
noe
nou
nue
oaf
obn
obu
oci
oke
olk
oos
orc
oro
osu
ove
paa
paf
pam
paq
pas
pau
pay
pem
pes
pfi
phl
pid
pio
ple
plo
pom
pos
pre
pro
pru
psi
pul
pum
pup
put
pys
qag
qub
rab
rah
ras
red
reh
reu
rhu
rin
roc
rot
rox
rue
ruh
ryd
saa
sai
san
sao
sav
sce
sci
scy
sem
sen
ses
shl
sih
sin
sio
smo
som
soy
sph
spj
sra
stg
sts
suc
sum
suv
szo
tab
tal
taq
tay
ten
teo
tes
tha
thl
tif
toc
tos
tre
trl
try
tuc
tus
uac
ume
uni
urd
vaa
vap
vas
vep
ves
vid
vip
vis
vob
vup
waa
wam
weg
who
wom
xac
yaa
yot
zaa
zem
zoo
|