- taquinensis, Plekocheilus taquinensis (L. Pfeiffer, 1855) - (AMPHIBULIMIDAE)
- taquinensis, Bulimus taquinensis L. Pfeiffer, 1855 - syn of: Plekocheilus taquinensis (L. Pfeiffer, 1855) - (BULIMULIDAE)
- tara, Aldisa tara S.V. Millen in S.V. Millen & T.M. Gosliner, 1985 - (CADLINIDAE)
- tara, Liarea aupouria tara A.W.B. Powell, 1954 - (LIAREIDAE)
- tara, Patella tara B. Prashad & Surya Rao, 1934 - syn of: Scutellastra flexuosa (J.R.C. Quoy & J.P. Gaimard, 1834) - (PATELLIDAE)
- tara, Scutellastra tara B. Prashad & Surya Rao, 1934 - syn of: Scutellastra flexuosa (J.R.C. Quoy & J.P. Gaimard, 1834) - (PATELLIDAE)
- taraae, Acrioceras taraae Sarkar, 1955 † - (ANCYLOCERATIDAE) (FOSSIL)
- tarabosensis, Spelaeopatula tarabosensis (F. Riedel, 1970) - (ZONITIDAE)
- taracaicum, Laevicardium taracaicum (M. Yokoyama, 1930 †) - (CARDIIDAE) (FOSSIL)
- Taraclausilia, syn of: Genus Protoherilla A. Wagner, 1921 (CLAUSILIIDAE)
- tarae, Paladilhiopsis tarae J. Bole & F. Velkovrh, 1987 - (MOITESSIERIIDAE)
- taraensis, Bythinella taraensis P. Glöer & V.M. Pešic, 2010 - (BYTHINELLIDAE)
- taraensis, Monachoides taraensis A.J. de Winter & W.J.M. Maassen, 1992 - (HYGROMIIDAE)
- taraguyense, Pisidium taraguyense C.F. Ituarte, 2000 - (SPHAERIIDAE)
- Taraia, Subgenus Taitaa (Taraia) C.M. Cooke & Y. Kondo, 1960 (ACHATINELLIDAE)
- Taraisites, Genus Taraisites Cantú , 1966 † (OLCOSTEPHANIDAE) (FOSSIL)
- tarameahensis, Mesotrigonia tarameahensis S. Freneix, 1958 † - (TRIGONIIDAE) (FOSSIL)
- Taramellia, Subgenus Alvania (Taramellia) Seguenza, 1903 † (RISSOIDAE) (FOSSIL)
- Taramellia, syn of: Genus Alvania A. Risso, 1826 (RISSOIDAE)
- Taramelliceras, Genus Taramelliceras Campana , 1905 † (OPPELIIDAE) (FOSSIL)
- taramellii, Ptychomphalina taramellii Spitz, 1907 † - (PTYCHOMPHALIDAE) (FOSSIL)
- taramellii, Purpuroidea taramellii (Stoppani, 1865 †) - (PURPUROIDEIDAE) (FOSSIL)
- taramellii, Leiophyllites taramellii (Martelli, 1904 †) - (USSURITIDAE) (FOSSIL)
- taranakiensis, Antiguraleus taranakiensis (J. Marwick, 1926 †) - (MANGELIIDAE) (FOSSIL)
- taranakiensis, Zeacolpus taranakiensis J. Marwick, 1965 † - (TURRITELLIDAE) (FOSSIL)
- taranetsi, Kunashiria taranetsi Y.I. Kantor & A.V. Sysoev, 2005 - syn of: Sinanodonta woodiana (I. Lea, 1834) - (UNIONIDAE)
- tarangaensis, Amborhytida dunniae tarangaensis (A.W.B. Powell, 1930) - (RHYTIDIDAE)
- Taranidaphne, Genus Taranidaphne M. Morassi & A. Bonfitto, 2001 (RAPHITOMIDAE)
- Taranis, Genus Taranis J.G. Jeffreys, 1870 (RAPHITOMIDAE)
- Taranota, Genus Taranota Rogalla & Amler, 2000 † (ORTHONOTIDAE) (FOSSIL)
- TARANTECONIDAE - syn of Family: CONIDAE
- Taranteconus, Genus Taranteconus M. Azuma, 1972 (CONIDAE)
- Tarantellaxis, syn of: Genus Babelomurex G.S. Coen, 1922 (MURICIDAE)
- Tarantinaea, Subgenus Fasciolaria (Tarantinaea) T.A. de M. Monterosato, 1817 (FASCIOLARIIDAE)
- tarantinus, Murex tarantinus J.B.P.A. Lamarck, 1822 - syn of: Ocenebra erinaceus (C. Linnaeus, 1758) - (MURICIDAE)
- taranui, Hirtomurex taranui B.A. Marshall & M. Oliverio, 2009 - (MURICIDAE)
- tarapacaense, Euaspidoceras tarapacaense Parent, 2006 † - (ASPIDOCERATIDAE) (FOSSIL)
- tarapotensis, Labyrinthus tarapotensis (S. Moricand, 1858) - (CAMAENIDAE)
- tarapotensis baeri, Labyrinthus tarapotensis baeri (P. Dautzenberg, 1902) - (CAMAENIDAE)
- tararensis, Dermomurex tararensis B. Garrigues & D. Merle, 2014 - (MURICIDAE)
- tararuaensis, Powelliphanta traversi tararuaensis (A.W.B. Powell, 1939) - (RHYTIDIDAE)
- Taras, syn of: Genus Diplodonta H.G. Bronn, 1831 (UNGULINIDAE)
- tarasconii, Caryocorbula tarasconii (E.P. Arruda, O. Domaneschi & al., 2007) - (CORBULIDAE)
- tarasconii, Pugnus tarasconii E. de C. Rios, 2009 - (MARGINELLIDAE)
- tarasconii, Dissona tarasconii L. Bozzetti, 2007 - (OVULIDAE)
- tarasovi, Velutina tarasovi K.M. Derjugin, 1950 - (VELUTINIDAE)
- tarava, Profundiconus tarava (M. Rabiller & G. Richard, 2014) - (CONIDAE)
- taravaensis, Pyrgulina taravaensis Peñas & Rolán, 2017 - (PYRAMIDELLIDAE)
- taravali, Melanella taravali P. Bartsch, 1917 - syn of: Vitreolina yod (P.P. Carpenter, 1857) - (EULIMIDAE)
- taravali, Odostomia taravali P. Bartsch, 1917 - (PYRAMIDELLIDAE)
- Tarazeuxis, syn of: Genus Nassarius Duméril, 1805 (NASSARIIDAE)
- tarazi, Julfotoceras tarazi Bando, 1973 † - (OTOCERATIDAE) (FOSSIL)
- tarbagataica, Cathaica cavimargo tarbagataica P.V. Matiokin, 1966 - (BRADYBAENIDAE)
- Tarbagataja, Subgenus Ponsadenia (Tarbagataja) A.A. Schileyko, 1978 (BRADYBAENIDAE)
- tarbeliana pyrulata, Volema tarbeliana pyrulata L.M.D. Bellardi & O.G. Michelotti, 1840 † - syn of: Pugilina pyrulata (L.M.D. Bellardi & O.G. Michelotti, 1840 †) - (MELONGENIDAE) (FOSSIL)
- tarbella, Cernuella tarbella J. Berthier in É.A.A. Locard, 1894 - syn of: Cernuella neglecta (J.P.R. Draparnaud, 1805) - (HYGROMIIDAE)
- tarbelliana, Fasciolaria tarbelliana J.P.S. Grateloup, 1840 † - (FASCIOLARIIDAE) (FOSSIL)
- tarbelliana, Erentoezia tarbelliana (P. Lozouet, 1998 †) - (IRAVADIIDAE) (FOSSIL)
- tarbelliana, Pseudonoba tarbelliana P. Lozouet, 1998 † - syn of: Erentoezia tarbelliana (P. Lozouet, 1998 †) - (IRAVADIIDAE) (FOSSIL)
- tarbelliana, Charonia tarbelliana (J.P.S. Grateloup, 1848 †) - (RANELLIDAE) (FOSSIL)
- tarbelliana, Scaphella tarbelliana (J.P.S. Grateloup, 1840 †) - (VOLUTIDAE) (FOSSIL)
- tarbelliana praecedens, Fasciolaria tarbelliana praecedens M.A. Peyrot, 1925 † - (FASCIOLARIIDAE) (FOSSIL)
- tarbelliana transiens, Charonia tarbelliana transiens Baldi, 1973 † - (RANELLIDAE) (FOSSIL)
- tarbellianus, Conus tarbellianus J.P.S. Grateloup, 1835 † - (CONIDAE) (FOSSIL)
- tarbellianus, Scaphander tarbellianus (J.P.S. Grateloup, 1837 †) - (SCAPHANDRIDAE) (FOSSIL)
- tarchanensis, Donax tarchanensis (Andrussov in Bajarunas) † - (DONACIDAE) (FOSSIL)
- tarchanensis, Hydrobia tarchanensis Zhizhchenko, 1936 † - (HYDROBIIDAE) (FOSSIL)
- tarcoolanum, Sinumelon tarcoolanum G.A. Solem, 1992 - (CAMAENIDAE)
- tarcylae, Asperarca tarcylae J. de A. Francisco, J.C.N. Barros & S.F.B. de Lima, 2012 - (ARCIDAE)
- tarda, Aplysia tarda A.E. Verrill, 1901 - (APLYSIIDAE)
- tarda, Barrandicella tarda (J. Perner, 1903 †) - (ARCHINACELLIDAE) (FOSSIL)
- tarda, Bubovicus tarda (J. Perner, 1903 †) - (BELLEROPHONTIDAE) (FOSSIL)
- tarda, Fibula tarda (C.F. Parona, 1895 †) - (CERITELLIDAE) (FOSSIL)
- tarda, Pycnodonte tarda (F.W. Hutton, 1873 †) - (GRYPHAEIDAE) (FOSSIL)
- tarda, Ferrissia tarda (T. Say) - (PLANORBIDAE)
- tarda, Pleurobranchaea tarda A.E. Verrill, 1880 - (PLEUROBRANCHAEIDAE)
- tarda, Vitrea tarda P. Fagot, 1887 - syn of: Vitrea subrimata (O.W.H. Reinhardt, 1871) - (PRISTILOMATIDAE)
- Tardarpoceras, syn of: Genus Harpoceras Sowerby, 1820 † (HILDOCERATIDAE) (FOSSIL)
- Tardeceras, Genus Tardeceras Hyatt & Smith, 1905 † (TROPICELTITIDAE) (FOSSIL)
- tardecrescens, Paltechioceras tardecrescens (J. Von Hauer, 1856 †) - (ECHIOCERATIDAE) (FOSSIL)
- tardecrescens, Eoderoceras tardecrescens Pia, 1913 † - (EODEROCERATIDAE) (FOSSIL)
- tardefurcata, Leymeriella tardefurcata (Leymerie, 1841 †) - (LEYMERIELLIDAE) (FOSSIL)
- tardemutata, Codinella tardemutata (E.A.L. Kittl, 1894 †) - (STUORELLIDAE) (FOSSIL)
- tardemutatus, Perotrochus tardemutatus E.A.L. Kittl, 1894 † - syn of: Codinella tardemutata (E.A.L. Kittl, 1894 †) - (PLEUROTOMARIIDAE) (FOSSIL)
- tardense, Hatchericeras tardense Stanton, 1901 † - syn of: Hatchericeras patagonense Stanton, 1901 † - (NEOCOMITIDAE) (FOSSIL)
- Tardewocklumeria, Genus Tardewocklumeria Becker , 2000 † (PARAWOCKLUMERIIDAE) (FOSSIL)
- Tardicolumbites, Genus Tardicolumbites Guex & al., 2005 † (COLUMBITIDAE) (FOSSIL)
- tardicolumbus, Tardicolumbites tardicolumbus Guex & al., 2005 † - (COLUMBITIDAE) (FOSSIL)
- tardicostatum, Aleteceras tardicostatum Whitehouse, 1926 † - (LABECERATIDAE) (FOSSIL)
- tardicrescens, Phos tardicrescens R. Tate, 1888 † - (NASSARIIDAE) (FOSSIL)
- tardieui, Heteroceras tardieui Kilian, 1889 † - (HETEROCERATIDAE) (FOSSIL)
- tardiornatum, Hemicymbites tardiornatum Dommergues, 2015 † - (ARIETITIDAE) (FOSSIL)
- tardiradiata, Cosa tardiradiata (B.C. Cotton, 1931) - (PHILOBRYIDAE)
- tardissima, Platypilina tardissima (J. Perner, 1903 †) - (SCENELLIDAE) (FOSSIL)
- tardita, Leptomaria tardita Sieberer, 1907 † - (PLEUROTOMARIIDAE) (FOSSIL)
- tardivelae, Sphaerocypraea tardivelae L. Dolin & Ledon, 2002 † - (EOCYPRAEIDAE) (FOSSIL)
- tardosensis, Dactylioceras tardosensis Kovács, 2014 † - (DACTYLIOCERATIDAE) (FOSSIL)
- tardosi, Himalayites tardosi Fozy & al., 2013 † - (HIMALAYITIDAE) (FOSSIL)
- tardum, Manticoceras sinuosum tardum (A.H. Clarke, 1898 †) - (GEPHUROCERATIDAE) (FOSSIL)
- tardum, Otomaroceras tardum (Barrande, 1865 †) - (HERCOCERATIDAE) (FOSSIL)
- tardum, Tardarpoceras tardum Buckman, 1927 † - syn of: Harpoceras falciferum J. de C. Sowerby, 1820 † - (HILDOCERATIDAE) (FOSSIL)
- tardum, Meekoceras tardum (L. Waagen, 1895 †) - (MEEKOCERATIDAE) (FOSSIL)
- tardum, Cyrtoceras tardum Barrande † - (ONCOCERIDA (UNASSIGNED)) (FOSSIL)
- tardum, Arctomeekoceras tardum Guex & al., 2005 † - (PROPTYCHITIDAE) (FOSSIL)
- tardum, Trochoceras tardum Barrande † - (RUTOCERATIDAE) (FOSSIL)
- tardus, Lenotropites tardus McLearn, 1969 † - (LONGOBARDITIDAE) (FOSSIL)
- tardus, Costidiscus tardus Avram, 1978 † - (MACROSCAPHITIDAE) (FOSSIL)
- tardus, Perrinites tardus Miller & Furnish, 1940 † - (PERRINITIDAE) (FOSSIL)
- tardus, Planitrochus tardus J. Perner, 1903 † - (PLANITROCHIDAE) (FOSSIL)
- tardus, Wasatchites tardus McLearn, 1945 † - (PRIONITIDAE) (FOSSIL)
- tardus, Sakmarites tardus Borissenkov, 2010 † - (PRONORITIDAE) (FOSSIL)
- tardyana, Pupilla tardyana É.A.A. Locard, 1894 - syn of: Pupilla triplicata (S.E. Studer, 1820) - (PUPILLIDAE)
- tardyanus, Viviparus tardyanus É.A.A. Locard, 1883 † - (VIVIPARIDAE) (FOSSIL)
- tardyi, Helicella tardyi J.R. Bourguignat in É.A.A. Locard, 1882 - syn of: Helicella itala (C. Linnaeus, 1758) - (HYGROMIIDAE)
- tardyi, Placida tardyi (S. Trinchese, 1873) - (LIMAPONTIIDAE)
- Tarebia, Genus Tarebia H. Adams & A. Adams, 1854 (THIARIDAE)
- tareka, Tricarilda tareka Grundel, 1997 † - (MATHILDIDAE) (FOSSIL)
- tarensis, Delima montenegrina tarensis H. Nordsieck, 2015 - (CLAUSILIIDAE)
- tarensis, Herilla ziegleri tarensis P.S. Pavlovic, 1912 - (CLAUSILIIDAE)
- tarentina, Fasciolaria tarentina J.B.P.A. Lamarck, 1822 - syn of: Tarantinaea lignaria (C. Linnaeus, 1758) - (FASCIOLARIIDAE)
- tarentina, Gastrochaena tarentina E.M. Da Costa, 1829 - syn of: Rocellaria dubia (T. Pennant, 1777) - (GASTROCHAENIDAE)
- tarentina, Trochoidea tarentina L. Pfeiffer, 1848 - syn of: Trochoidea pyramidata (J.P.R. Draparnaud, 1805) - (HYGROMIIDAE)
- tarentina, Mangelia striolata tarentina (F. Nordsieck, 1968) - (MANGELIIDAE)
- tarentina, Ocenebra tarentina J.B.P.A. Lamarck, 1822 - syn of: Ocenebra erinaceus tarentina (J.B.P.A. Lamarck, 1822) - (MURICIDAE)
- tarentina, Ocenebra erinaceus tarentina (J.B.P.A. Lamarck, 1822) - (MURICIDAE)
- tarentina, Cyclope tarentina P. Parenzan, 1970 - syn of: Cyclope neritea (C. Linnaeus, 1758) - (NASSARIIDAE)
- tarentina, Ostrea edulis tarentina A. Issel, 1882 - (OSTREIDAE)
- tarentina, Patella tarentina C.U.A. von Salis-Marschlins, 1793 - syn of: Patella ulyssiponensis J.F. Gmelin, 1791 - (PATELLIDAE)
- tarentina, Hiatula tarentina J.B.P.A. Lamarck, 1818 - syn of: Gastrana fragilis (C. Linnaeus, 1758) - (PSAMMOBIIDAE)
- tarentina, Pteria tarentina J.B.P.A. Lamarck, 1819 - syn of: Pteria hirundo (C. Linnaeus, 1758) - (PTERIIDAE)
- tarentina, Raphitoma purpurea tarentina F. Nordsieck, 1977 - (RAPHITOMIDAE)
- tarentini, Pleurotoma tarentini R.A. Philippi, 1844 - syn of: Drilliola loprestiana (P. Calcara, 1841) - (TURRIDAE)
- tarentinum, Dentalium tarentinum J.B.P.A. Lamarck, 1818 - syn of: Antalis vulgaris (E.M. Da Costa, 1778) - (DENTALIIDAE)
- tarfayense, Hypengonoceras tarfayense M. Collignon, 1966 † - (KNEMICERATIDAE) (FOSSIL)
- targatus, Falcidens targatus L. Salvini-Plawén, 1986 - (CHAETODERMATIDAE)
- Targionia, syn of: Subgenus Vitrina (Semilimacella) L. Soós, 1917 (VITRINIDAE)
- targioniana, Vitrea targioniana M. Paulucci, 1882 - syn of: Vitrea subrimata (O.W.H. Reinhardt, 1871) - (PRISTILOMATIDAE)
- targionianum, Pisidium targionianum M. Paulucci, 1880 - syn of: Pisidium casertanum (Poli, 1791) - (SPHAERIIDAE)
- targionii, Procochlodina targionii C. De Stefani, 1883 - syn of: Procochlodina incisa (H.C. Küster, 1875) - (CLAUSILIIDAE)
- targionii, Fuciniceras targionii (Fucini, 1905 †) - (HILDOCERATIDAE) (FOSSIL)
- targionius, Scaphander targionius A. Risso, 1826 - syn of: Scaphander lignarius (C. Linnaeus, 1758) - (SCAPHANDRIDAE)
- targoniana, Belgrandia targoniana (S. Clessin, 1882) - (HYDROBIIDAE)
- targotegulatus, Falcidens targotegulatus L. Salvini-Plawén, 1992 - (CHAETODERMATIDAE)
- targouasensis, Mercuria targouasensis P. Glöer, H.D. Boeters & Walther, 2015 - (HYDROBIIDAE)
- targovishtensis, Hibolithes targovishtensis Stoyanova-Vergilova, 1979 † - (MESOHIBOLITHIDAE) (FOSSIL)
- Taria, syn of: Genus Paphies R.P. Lesson, 1831 (MESODESMATIDAE)
- tarifaensis, Taringa tarifaensis J.C. García-Gómez, J.L. Cervera & S.F. Garcia-Martin, 1993 - syn of: Aporodoris millegrana (J. Alder & A. Hancock, 1854) - (DISCODORIDIDAE)
- tarifaensis, Discodoris tarifaensis J.C. García-Gómez, J.L. Cervera & S.F. Garcia-Martin, 1993 - syn of: Aporodoris millegrana (J. Alder & A. Hancock, 1854) - (DISCODORIDIDAE)
- tarifensis, Pseudotachea tarifensis W. Kobelt, 1903 - syn of: Pseudotachea litturata (L. Pfeiffer, 1851) - (HELICIDAE)
- tarifensis, Xeromagna tarifensis G. Servain, 1880 - syn of: Xerosecta reboudiana (J.R. Bourguignat, 1863) - (HYGROMIIDAE)
- tarifensis, Onoba tarifensis H.J. Hoenselaar & R.G. Moolenbeek, 1987 - (RISSOIDAE)
- tarimensis, Helicaulax tarimensis P. Wei, 1984 † - (APORRHAIDAE) (FOSSIL)
- tarimensis, Eotomaria tarimensis Yü, 1961 † - (EOTOMARIIDAE) (FOSSIL)
- tarimensis, Ninella tarimensis Z.X. Qian & Q. Xiao, 1984 † - (TURBINIDAE) (FOSSIL)
- Taringa, Genus Taringa E.G.G. Marcus, 1955 (DISCODORIDIDAE)
- tarini, Hoplites tarini Kilian, 1889 † - syn of: Lopeziceras chaperi (Pictet, 1868 †) - (HOPLITIDAE) (FOSSIL)
- tarka, Sclerodoris tarka R.F. Burn, 1969 - (DISCODORIDIDAE)
- tarkowskii, Taramelliceras tarkowskii Quéreilhac, 2009 † - (OPPELIIDAE) (FOSSIL)
- tarltonense, Calliostoma tarltonense P.O. Jung, 1971 † - (CALLIOSTOMATIDAE) (FOSSIL)
- tarmensis, Reclasta tarmensis W.K. Weyrauch, 1967 - syn of: Bostryx pictus (L. Pfeiffer, 1855) - (BULIMULIDAE)
- tarmensis, Scholvienia tarmensis (R.A. Philippi, 1867) - (MEGASPIRIDAE)
- tarmensis weeksi, Scholvienia tarmensis weeksi H.A. Pilsbry, 1930 - (MEGASPIRIDAE)
- tarnatalis, Rissoina tarnatalis A.A. Gould - (RISSOINIDAE)
- tarnieri, Oestophora tarnieri (P.M.A. Morelet, 1854) - (TRISSEXODONTIDAE)
- tarnierianus, Napaeus tarnierianus J.P.A. Grasset, 1856 - syn of: Napaeinus tabidus (R.J. Shuttleworth, 1852) - (ENIDAE)
- taroaniara, Turbonilla taroaniara A. Peñas & E. Rolán, 2010 - (PYRAMIDELLIDAE)
- Tarocystis, syn of: Genus Tengchiena F.C. Baker, 1942 (EUCONULIDAE)
- Taron, Genus Taron F.W. Hutton, 1883 (FASCIOLARIIDAE)
- taronga, Philinopsis taronga (J.K. Allan, 1933) - (AGLAJIDAE)
- tarpeia, Pyramidella tarpeia P. Bartsch, 1915 - (PYRAMIDELLIDAE)
- Tarphyceras, Genus Tarphyceras Hyatt, 1894 † (TARPHYCERATIDAE) (FOSSIL)
- TARPHYCERATIDAE Hyatt, 1894 † - Family (CEPHALOPODA-NAUTILOIDEA [Subclass]-TARPHYCERIDA [Order]) (FOSSIL)
- TARPHYCERIDA (UNASSIGNED) - Family (CEPHALOPODA-NAUTILOIDEA [Subclass]-TARPHYCERIDA [Order]) (FOSSIL)
- tarquinia, Periglypta tarquinia (W.H. Dall, 1900 †) - (VENERIDAE) (FOSSIL)
- tarracense, Deroceras tarracense C.O. Van Regteren Altena, 1969 - (AGRIOLIMACIDAE)
- tarraceuse, Deroceras tarraceuse C.O. Van Regteren Altena, 1969 - (AGRIOLIMACIDAE)
- tarraconensis, Chondrina tarraconensis P. Fagot, 1888 - syn of: Chondrina farinesii C. des Moulins, 1835 - (CHONDRINIDAE)
- tarraconensis, Suboestophora tarraconensis (J.B. Aguilar-Amat, 1935) - (HYGROMIIDAE)
- tarraconensis, Oestophora tarraconensis J.B. Aguilar-Amat, 1960 - (TRISSEXODONTIDAE)
- tarraconensis, Oligolimax tarraconensis C.A. Westerlund, 1893 - syn of: Phenacolimax annularis (S.E. Studer, 1820) - (VITRINIDAE)
- tarraconensis foixi, Oestophora tarraconensis foixi (C. Altimira, 1967) - (TRISSEXODONTIDAE)
- Tarraconia, Genus Tarraconia M.A. Ramos & B. Arconada, 2000 (HYDROBIIDAE)
- tarragai, Turbonilla tarragai A. Peñas & E. Rolán, 2010 - (PYRAMIDELLIDAE)
- tarrantense, Conlinoceras tarrantense (Adkins, 1928 †) - (ACANTHOCERATIDAE) (FOSSIL)
- tarrantense, Dipoloceras tarrantense P.H. Scott, 1928 † - (BRANCOCERATIDAE) (FOSSIL)
- tarrantensis, Cuphosolenus tarrantensis (Stanton, 1947 †) - (APORRHAIDAE) (FOSSIL)
- tarrantensis, Avellana tarrantensis Cragin, 1893 † - (RINGICULIDAE) (FOSSIL)
- Tarrantoceras, Genus Tarrantoceras Stephenson, 1953 † (ACANTHOCERATIDAE) (FOSSIL)
- tarravillensis, Allocharopa tarravillensis (C.J. Gabriel, 1930) - (CHAROPIDAE)
- tarrhion, Maoritomella tarrhion R.N. Kilburn, 1986 - (BORSONIIDAE)
- tarri, Ithycythara tarri (C.J. Maury, 1910 †) - (MANGELIIDAE) (FOSSIL)
- tarruelasi, Prolixodens tarruelasi (A. Peñas & E. Rolán, 2006) - (CERITHIOPSIDAE)
- tarruellasi, Cerithiopsis tarruellasi A. Peñas & E. Rolán, 2006 - (CERITHIOPSIDAE)
- tarsiai, Angustipes tarsiai (I. Coifmann, 1934) - (VERONICELLIDAE)
- tarsodes, Alvania tarsodes (R.B. Watson, 1886) - (RISSOIDAE)
- tarta, Nassaria tarta K. Fraussen, 2006 - (NASSARIIDAE)
- tartagiana, Cernuella tartagiana E. Caziot, 1903 - syn of: Cernuella virgata (E.M. Da Costa, 1778) - (HYGROMIIDAE)
- tartaneata, Fenimorea tartaneata P.J. Fallon, 2016 - (DRILLIIDAE)
- tartanella, Trapania tartanella (H.F.A. von Ihering, 1886) - (GONIODORIDIDAE)
- tartarea, Fontigens tartarea L.R. Hubricht, 1963 - (AMNICOLIDAE)
- Tartaroceras, Genus Tartaroceras Zhuravleva, 1978 † (ORTHOCERIDA (UNASSIGNED)) (FOSSIL)
- tarturensis, Ispharina tarturensis Awad & Abed, 1967 † - (TURRITELLIDAE) (FOSSIL)
- Tarturia, Genus Tarturia Strougo, 1983 † (PTERIIDA (UNASSIGNED)) (FOSSIL)
- tarua, Dacryomya tarua Skwarko, 1973 † - (NUCULANIDAE) (FOSSIL)
- tarutana, Retusa tarutana K.R. Smythe, 1979 - (RETUSIDAE)
- tarvisianus, Oxychilus tarvisianus C. De Stefani, 1883 - syn of: Oxychilus draparnaudi (H.H. Beck, 1837) - (OXYCHILIDAE)
- tarynica, Orthotheca tarynica Meshkova, 1974 † - (CIRCOTHECIDAE) (FOSSIL)
- tarynicus, Novitatus tarynicus A.V. Sysoev, 1968 † - (NOVITATIDAE) (FOSSIL)
- tasaryense, Gymnotoceras tasaryense Konstantinov, 1991 † - (BEYRICHITIDAE) (FOSSIL)
- tasaryensis, Meleagrinella tasaryensis Voronetz, 1936 † - (OXYTOMIDAE) (FOSSIL)
- taschei, Mesohalina taschei (Ludwig, 1865 †) - (POTAMIDIDAE) (FOSSIL)
- tasconium, Crassispira tasconium (J.C. Melvill & R. Standen, 1901) - (PSEUDOMELATOMIDAE)
- tasekoi, Eolytoceras tasekoi Frebold, 1967 † - (LYTOCERATIDAE) (FOSSIL)
- Taselasmodum, Genus Taselasmodum Guo, 1985 † (CYCLOCONCHIDAE) (FOSSIL)
- taseviensis, Gyraulus taseviensis P. Glöer & A. Girod, 2013 - (PLANORBIDAE)
- tasex, Ostrea tasex Gardner, 1923 † - syn of: Ostrea multilirata T.A. Conrad in Emory, 1857 † - (OSTREIDAE) (FOSSIL)
- tashiensis, Calagrassor tashiensis (Y.C. Lee & T.C. Lan, 2002) - (BUCCINIDAE)
- tashiensis, Eosipho tashiensis Y.C. Lee & T.C. Lan, 2002 - syn of: Calagrassor tashiensis (Y.C. Lee & T.C. Lan, 2002) - (BUCCINIDAE)
- tashiensis, Nuculana tashiensis T.C. Lan & Y.C. Lee, 2001 - (NUCULANIDAE)
- Tashiroella, Genus Tashiroella Cooper & Leanza, 2017 † (STEINMANELLIDAE) (FOSSIL)
- taskanensis, Neocladiscites taskanensis A.M. Popov, 1961 † - (CLADISCITIDAE) (FOSSIL)
- taskanica, Kolymia taskanica Biakov, 2012 † - (KOLYMIIDAE) (FOSSIL)
- Taskanites, syn of: Genus Convoluticeras Erben , 1960 † (TEICHERTICERATIDAE) (FOSSIL)
- Taskanoceras, Genus Taskanoceras Zhuravleva, 1972 † (DISCOSORIDA (UNASSIGNED)) (FOSSIL)
- taslei, Lautoconus taslei (L.C. Kiener, 1850) - (CONIDAE)
- taslei, Natica taslei C.A. Récluz, 1853 - syn of: Natica broderipiana C.A. Récluz, 1844 - (NATICIDAE)
- taslei, Patella taslei J.F. Mabille, 1888 - syn of: Patella depressa T. Pennant, 1777 - (PATELLIDAE)
- taslei, Physa taslei J.R. Bourguignat, 1860 - (PHYSIDAE)
- Tasmadaphne, Genus Tasmadaphne C.F. Laseron, 1954 (RAPHITOMIDAE)
- Tasmadelos, syn of: Genus Rhytida J.A. Albers, 1860 (RHYTIDIDAE)
- Tasmadora, syn of: Genus Physastra C.M. Tapparone-Canefri, 1883 (PLANORBIDAE)
- Tasmalira, Genus Tasmalira W.H. Dall, 1956 (EPITONIIDAE)
- Tasmancylus, syn of: Genus Ancylastrum J.R. Bourguignat, 1853 (PLANORBIDAE)
- Tasmanembryon, Subgenus Bothriembryon (Tasmanembryon) T. Iredale, 1933 (BOTHRIEMBRYONTIDAE)
- tasmanensis, Kelliella tasmanensis J. Knudsen, 1970 - (KELLIELLIDAE)
- tasmanensis, Lecanospira tasmanensis Kobayashi, 1940 † - (OPHILETIDAE) (FOSSIL)
- tasmanensis, Vesicomya tasmanensis (J. Knudsen, 1970) - (VESICOMYIDAE)
- tasmani, Torresitrachia tasmani F. Köhler, 2011 - (CAMAENIDAE)
- tasmani, Fluviopupa tasmani S. Zielske & M. Haase, 2014 - (HYDROBIIDAE)
- tasmani, Limopsis tasmani (R.K. Dell, 1956) - (LIMOPSIDAE)
- tasmani, Catillopecten tasmani H.H. Dijkstra & B.A. Marshall, 2008 - (PROPEAMUSSIIDAE)
- tasmani, Delouagapia tasmani (J.F. Goulstone & F.J. Brook, 1999) - (RHYTIDIDAE)
- tasmaniae, Pernagera tasmaniae (J.C. Cox, 1868) - (CHAROPIDAE)
- tasmaniae, Conus tasmaniae G.B. II Sowerby, 1866 - syn of: Pionoconus magus (C. Linnaeus, 1758) - (CONIDAE)
- tasmaniae, Macroschisma tasmaniae G.B. II Sowerby, 1866 - (FISSURELLIDAE)
- tasmaniae, Helix tasmaniae J.C. Cox, 1868 - syn of: Pernagera tasmaniae (J.C. Cox, 1868) - (HELICIDAE)
- tasmanica, Akera tasmanica R.H. Beddome, 1883 - syn of: Diaphana tasmanica (R.H. Beddome, 1883) - (AKERIDAE)
- tasmanica, Pisinna tasmanica (J.E. Tenison-Woods, 1876) - (ANABATHRIDAE)
- tasmanica, Hydatina tasmanica R.H. Beddome - (APLUSTRIDAE)
- tasmanica, Cryptassiminea tasmanica (J.E. Tenison-Woods, 1876) - (ASSIMINEIDAE)
- tasmanica, Assiminea tasmanica J.E. Tenison-Woods, 1876 - syn of: Cryptassiminea buccinoides (J.R.C. Quoy & J.P. Gaimard, 1834) - (ASSIMINEIDAE)
- tasmanica, Bathyspinula tasmanica J. Knudsen, 1970 - syn of: Ledella tasmanica (J. Knudsen, 1970) - (BATHYSPINULIDAE)
- tasmanica, Spinula tasmanica J. Knudsen, 1970 - syn of: Ledella tasmanica (J. Knudsen, 1970) - (BATHYSPINULIDAE)
- tasmanica, Cominella tasmanica J.E. Tenison-Woods, 1876 - (BUCCINIDAE)
- tasmanica, Cadlina tasmanica W.B. Rudman, 1990 - (CADLINIDAE)
- tasmanica, Calliostoma tasmanica (Johnston, 1880 †) - (CALLIOSTOMATIDAE) (FOSSIL)
- tasmanica, Sydaphera tasmanica (J.E. Tenison-Woods, 1876) - (CANCELLARIIDAE)
- tasmanica, Glans tasmanica R. Tate, 1886 † - (CARDITIDAE) (FOSSIL)
- tasmanica, Mytilicardia tasmanica J.E. Tenison-Woods, 1876 - syn of: Cardita aviculina J.B.P.A. Lamarck, 1819 - (CARDITIDAE)
- tasmanica, Cardita tasmanica J.E. Tenison-Woods, 1876 - syn of: Cardita aviculina J.B.P.A. Lamarck, 1819 - (CARDITIDAE)
- tasmanica, Cocculinella tasmanica W.L. May, 1919 - syn of: Tectisumen tasmanica (W.L. May, 1919) - (COCCULINELLIDAE)
- tasmanica, Aforia tasmanica (A.V. Sysoev & Y.I. Kantor, 1988) - (COCHLESPIRIDAE)
- tasmanica, Abyssaforia tasmanica A.V. Sysoev & Y.I. Kantor, 1988 - syn of: Aforia tasmanica (A.V. Sysoev & Y.I. Kantor, 1988) - (COCHLESPIRIDAE)
- tasmanica, Austromitra tasmanica (J.E. Tenison-Woods, 1876) - (COSTELLARIIDAE)
- tasmanica, Pseudoneaera tasmanica (J.E. Tenison-Woods, 1878) - (CUSPIDARIIDAE)
- tasmanica, Myonera tasmanica (J. Knudsen, 1970) - (CUSPIDARIIDAE)
- tasmanica, Rhinoclama tasmanica (J.E. Tenison-Woods, 1876) - (CUSPIDARIIDAE)
- tasmanica, Diaphana tasmanica (R.H. Beddome, 1883) - (DIAPHANIDAE)
- tasmanica, Willungia tasmanica (Powell, 1938 †) - (EOCYPRAEIDAE) (FOSSIL)
- tasmanica, Zeidora tasmanica (R.H. Beddome, 1883) - (FISSURELLIDAE)
- tasmanica, Tugali tasmanica J.E. Tenison-Woods, 1877 - syn of: Tugali parmophoidea (J.R.C. Quoy, 1834) - (FISSURELLIDAE)
- tasmanica, Gaimardia tasmanica (R.H. Beddome, 1883) - (GAIMARDIIDAE)
- tasmanica, Cucurbitula tasmanica (J.E. Tenison-Woods, 1877) - (GASTROCHAENIDAE)
- tasmanica, Raphistomina tasmanica (Johnston, 1888 †) - (HOLOPEIDAE) (FOSSIL)
- tasmanica, Beddomeia tasmanica (J.E. Tenison-Woods, 1875) - (HYDROBIIDAE)
- tasmanica, Fluvidona tasmanica E.C. Von Martens, 1858 - syn of: Ascorhis tasmanica (E.C. Von Martens, 1858) - (HYDROBIIDAE)
- tasmanica, Myllita tasmanica (J.E. Tenison-Woods, 1875) - (LASAEIDAE)
- tasmanica, Anapa tasmanica J.E. Tenison-Woods, 1876 - syn of: Atactodea cuneata (J.B.P.A. Lamarck, 1818) - (LASAEIDAE)
- tasmanica, Laternula tasmanica (L.A. Reeve, 1863) - (LATERNULIDAE)
- tasmanica, Tectisumen tasmanica (W.L. May, 1919) - (LEPETELLIDAE)
- tasmanica, Tegulaherpia tasmanica L. Salvini-Plawén, 1988 - (LEPIDOMENIIDAE)
- tasmanica, Munditia tasmanica (J.E. Tenison-Woods, 1875) - (LIOTIIDAE)
- tasmanica, Austroginella tasmanica (J.E. Tenison-Woods, 1876) - (MARGINELLIDAE)
- tasmanica, Kopionella tasmanica E.A. Ashby, 1920 - syn of: Fremblya matthewsi tasmanica (E.A. Ashby, 1920) - (MOPALIIDAE)
- tasmanica, Fremblya matthewsi tasmanica (E.A. Ashby, 1920) - (MOPALIIDAE)
- tasmanica, Myochama tasmanica (J.E. Tenison-Woods, 1876) - (MYOCHAMIDAE)
- tasmanica, Nacella tasmanica R. Tate & W.L. May, 1900 - syn of: Propilidium tasmanicum (H.A. Pilsbry, 1895) - (NACELLIDAE)
- tasmanica, Nassa tasmanica J.E. Tenison-Woods, 1876 - syn of: Nassarius nigellus (L.A. Reeve, 1854) - (NASSARIIDAE)
- tasmanica, Natica tasmanica J.E. Tenison-Woods, 1876 - syn of: Conuber conicum (J.B.P.A. Lamarck, 1822) - (NATICIDAE)
- tasmanica, Ledella tasmanica (J. Knudsen, 1970) - (NUCULANIDAE)
- tasmanica, Panacca tasmanica (C. Hedley & W.L. May, 1914) - (PARILIMYIDAE)
- tasmanica, Scutellastra tasmanica J.E. Tenison-Woods, 1876 - syn of: Scutellastra peronii (H.M.D. de Blainville, 1825) - (PATELLIDAE)
- tasmanica, Periploma tasmanica F.W. Hutton, 1873 - syn of: Offadesma angasi (J.C.H. Crosse & P.H. Fischer, 1864) - (PERIPLOMATIDAE)
- tasmanica, Pholadomya tasmanica C. Hedley & W.L. May, 1914 - syn of: Panacca tasmanica (C. Hedley & W.L. May, 1914) - (PHOLADOMYIDAE)
- tasmanica, Atrina tasmanica (J.E. Tenison-Woods, 1876) - (PINNIDAE)
- tasmanica, Cyrtopinna tasmanica (J.E. Tenison-Woods, 1876) - syn of: Atrina tasmanica (J.E. Tenison-Woods, 1876) - (PINNIDAE)
- tasmanica, Ferrissia tasmanica (J.E. Tenison-Woods, 1876) - (PLANORBIDAE)
- tasmanica, Notocrater tasmanica (H.A. Pilsbry, 1895) - (PSEUDOCOCCULINIDAE)
- tasmanica, Avicula tasmanica Johnston, 1887 † - (PTERIIDAE) (FOSSIL)
- tasmanica, Vulsella tasmanica L.A. Reeve, 1858 - syn of: Vulsella ovata J.B.P.A. Lamarck, 1819 - (PTERIIDAE)
- tasmanica, Pupilla tasmanica G. Johnston, 1883 - (PUPILLIDAE)
- tasmanica, Oscilla tasmanica (J.E. Tenison-Woods, 1876) - (PYRAMIDELLIDAE)
- tasmanica, Turbonilla tasmanica J.E. Tenison-Woods, 1876 - (PYRAMIDELLIDAE)
- tasmanica, Pseudorissoina tasmanica (J.E. Tenison-Woods, 1877) - (PYRAMIDELLIDAE)
- tasmanica, Puposyrnola tasmanica (J.E. Tenison-Woods, 1877) - (PYRAMIDELLIDAE)
- tasmanica, Parthenia tasmanica J.E. Tenison-Woods, 1877 - syn of: Hinemoa ligata (G.F. Angas, 1877) - (PYRAMIDELLIDAE)
- tasmanica, Famelica tasmanica A.V. Sysoev & Y.I. Kantor, 1987 - (RAPHITOMIDAE)
- tasmanica, Asperdaphne tasmanica (J.E. Tenison-Woods, 1877) - (RAPHITOMIDAE)
- tasmanica, Asperdaphne tasmanica W.L. May, 1916 - syn of: Asperdaphne bela C. Hedley, 1922 - (RAPHITOMIDAE)
- tasmanica, Sinezona tasmanica W.F. Petterd, 1879 - syn of: Sukashitrochus atkinsoni (J.E. Tenison-Woods, 1877) - (SCISSURELLIDAE)
- tasmanica, Euprymna tasmanica (G.J. Pfeffer, 1884) - (SEPIOLIDAE)
- tasmanica, Sepiola tasmanica G.J. Pfeffer, 1884 - syn of: Euprymna tasmanica (G.J. Pfeffer, 1884) - (SEPIOLIDAE)
- tasmanica, Siphonaria tasmanica J.E. Tenison-Woods, 1876 - (SIPHONARIIDAE)
- tasmanica, Ascorhis tasmanica (E.C. Von Martens, 1858) - (TATEIDAE)
- tasmanica, Isotriphora tasmanica (J.E. Tenison-Woods, 1875) - (TRIPHORIDAE)
- tasmanica, Triphora tasmanica J.E. Tenison-Woods, 1875 - syn of: Isotriphora tasmanica (J.E. Tenison-Woods, 1875) - (TRIPHORIDAE)
- tasmanica, Nanula tasmanica (W.F. Petterd, 1879) - (TROCHIDAE)
- tasmanica, Ethalia tasmanica J.E. Tenison-Woods, 1877 - syn of: Ethminolia vitiliginea (K.T. Menke, 1843) - (TROCHIDAE)
- tasmanica, Astralium tasmanica J.E. Tenison-Woods, 1877 - syn of: Bellastraea aurea (I.H. Jonas, 1844) - (TURBINIDAE)
- tasmanica, Pleurotoma tasmanica W.L. May, 1911 - syn of: Epidirona xanthophaes (R.B. Watson, 1886) - (TURRIDAE)
- tasmanica, Gazameda tasmanica (L.A. Reeve, 1849) - (TURRITELLIDAE)
- tasmanica, Turritella tasmanica L.A. Reeve, 1849 - syn of: Gazameda tasmanica (L.A. Reeve, 1849) - (TURRITELLIDAE)
- tasmanica, Turritella tasmanica J.E. Tenison-Woods, 1876 - syn of: Colpospira atkinsoni R. Tate & W.L. May, 1900 - (TURRITELLIDAE)
- tasmanica, Diplodonta tasmanica J.E. Tenison-Woods, 1876 - (UNGULINIDAE)
- tasmanica, Gouldia tasmanica J.E. Tenison-Woods, 1876 - syn of: Myochama tasmanica (J.E. Tenison-Woods, 1876) - (VENERIDAE)
- tasmanica, Clementia tasmanica W.F. Petterd, 1884 - syn of: Kyrina rubiginosa (A. Adams & G.F. Angas, 1864) - (VENERIDAE)
- tasmanica, Venus tasmanica L.A. Reeve, 1864 - syn of: Tawera gallinula (J.B.P.A. Lamarck, 1818) - (VENERIDAE)
- tasmanica, Verticordia tasmanica W.L. May, 1915 - (VERTICORDIIDAE)
- tasmanicum, Propilidium tasmanicum (H.A. Pilsbry, 1895) - (LEPETIDAE)
- tasmanicum, Mesopeplum tasmanicum (Adams, 1863 †) - (PECTINIDAE) (FOSSIL)
- tasmanicum, Pisidium tasmanicum J.E. Tenison-Woods, 1876 - (SPHAERIIDAE)
- tasmanicus, Bothriembryon tasmanicus (L. Pfeiffer, 1853) - (BOTHRIEMBRYONTIDAE)
- tasmanicus, Bulimus tasmanicus L. Pfeiffer, 1853 - syn of: Bothriembryon tasmanicus (L. Pfeiffer, 1853) - (BULIMULIDAE)
- tasmanicus, Cumia tasmanicus Johnston, 1879 † - (COLUBRARIIDAE) (FOSSIL)
- tasmanicus, Conus tasmanicus J.E. Tenison-Woods, 1876 - syn of: Conasprella rutila (K.T. Menke, 1843) - (CONIDAE)
- tasmanicus, Glacidorbis tasmanicus W.F. Ponder & G.J. Avern, 2000 - (GLACIDORBIDAE)
- tasmanicus, Hydrococcus tasmanicus (J.E. Tenison-Woods, 1876) - (HYDROCOCCIDAE)
- tasmanicus, Guraleus tasmanicus (J.E. Tenison-Woods, 1876) - (MANGELIIDAE)
- tasmanicus, Mytilus tasmanicus J.E. Tenison-Woods, 1875 - syn of: Mytilus planulatus J.B.P.A. Lamarck, 1819 - (MYTILIDAE)
- tasmanicus, Pecten tasmanicus A. Adams & G.F. Angas, 1863 - syn of: Notochlamys hexactes (F. Péron in J.B.P.A. Lamarck, 1819) - (PECTINIDAE)
- tasmanicus, Gyraulus tasmanicus J.E. Tenison-Woods, 1876 - (PLANORBIDAE)
- tasmanicus, Sukashitrochus tasmanicus W.F. Petterd, 1879 - syn of: Sukashitrochus atkinsoni (J.E. Tenison-Woods, 1877) - (SCISSURELLIDAE)
- tasmanicus peronianus, Guraleus tasmanicus peronianus C.F. Laseron, 1954 - (MANGELIIDAE)
- Tasmaniella, syn of: Genus Beddomeia W.F. Petterd, 1889 (HYDROBIIDAE)
- tasmaniensis, Goniobranchus tasmaniensis (L.S.R. Bergh, 1905) - (CHROMODORIDIDAE)
- tasmaniensis, Chromodoris tasmaniensis L.S.R. Bergh, 1905 - syn of: Goniobranchus tasmaniensis (L.S.R. Bergh, 1905) - (CHROMODORIDIDAE)
- tasmaniensis, Dentalium tasmaniensis J.E. Tenison-Woods, 1877 - syn of: Dentalium stumkatae K.L. Lamprell & J.M. Healy, 1998 - (DENTALIIDAE)
- tasmaniensis, Fusus tasmaniensis G.B. Sowerby, 1880 - syn of: Penion maximus (G.W. Tryon, 1881) - (FASCIOLARIIDAE)
- Tasmanoceras, Genus Tasmanoceras Teichert & Glenister, 1952 † (ENDOCERATIDAE) (FOSSIL)
- tasmantis, Binda tasmantis C.F. Laseron, 1951 - syn of: Cerithiella pileata (C.F. Laseron, 1951) - (CERITHIOPSIDAE)
- tasmantis, Etrema denseplicata tasmantis C.F. Laseron, 1954 - (CLATHURELLIDAE)
- tasmantis, Guraleus tasmantis C.F. Laseron, 1954 - (MANGELIIDAE)
- tasmantis, Domiporta tasmantis C.F. Laseron, 1951 - syn of: Domiporta strangei (G.F. Angas, 1867) - (MITRIDAE)
- tasmantis tritomus, Guraleus tasmantis tritomus C.F. Laseron, 1954 - (MANGELIIDAE)
- Tasmaphena, Genus Tasmaphena T. Iredale, 1933 (RHYTIDIDAE)
- Tasmatica, Genus Tasmatica H.J. Finlay & J. Marwick, 1937 (NATICIDAE)
- Tasmeuthria, Subgenus Buccinulum (Tasmeuthria) T. Iredale, 1925 (BUCCINIDAE)
- Tasmocrossea, Genus Tasmocrossea R.K. Dell, 1952 (SKENEIDAE)
- Tasmodorbis, Genus Tasmodorbis W.F. Ponder & G.J. Avern, 2000 (GLACIDORBIDAE)
- tassaraensis, Pseudaspidoceras tassaraensis Meister & al., 1992 † - (ACANTHOCERATIDAE) (FOSSIL)
- tasselli, Retispira tasselli Frýda, 2000 † - (KNIGHTITIDAE) (FOSSIL)
- tasselli, Australoxa tasselli Cook & Camilleri, 1997 † - (LOXONEMATIDAE) (FOSSIL)
- tasselli, Decorospira tasselli Blodgett & Johnson, 1992 † - (PSEUDOPHORIDAE) (FOSSIL)
- Tasselliana, Genus Tasselliana Cook, Blodgett & Becker, 2003 † (GOSSELETINIDAE) (FOSSIL)
- tassoi, Prososthenia tassoi D. Esu & O. Girotti, 2001 † - (HYDROBIIDAE) (FOSSIL)
- tassyana, Cernuella tassyana P. Fagot in É.A.A. Locard, 1885 - syn of: Cernuella virgata (E.M. Da Costa, 1778) - (HYGROMIIDAE)
- tassyi, Riedelia tassyi (J.R. Bourguignat, 1884) - (HYGROMIIDAE)
- tastensis, Pseudosubulina tastensis (J.G. Cooper, 1894) - (SPIRAXIDAE)
- tastubense, Pararhiphaeoceras tastubense (N.D. Kruglov, 1928 †) - (RHIPHAEOCERATIDAE) (FOSSIL)
- tataense, Atlantoceras tataense Bensaïd, 1974 † - (ATLANTOCERATIDAE) (FOSSIL)
- tataensis, Allodiscus tataensis (F.M. Climo, 1971) - (CHAROPIDAE)
- tataensis, Pseudallodiscus tataensis F.M. Climo, 1971 - syn of: Allodiscus tataensis (F.M. Climo, 1971) - (CHAROPIDAE)
- tatahouinensis, Pietteia tatahouinensis Cox, 1969 † - (APORRHAIDAE) (FOSSIL)
- tatakaensis, Opacuincola tatakaensis M. Haase, 2008 - (TATEIDAE)
- Tatara, Genus Tatara J. Fleming, 1950 (CANCELLARIIDAE)
- tatarica, Profulvia tatarica Slodkewitsch, 1938 ex Kogan MS † - (CARDIIDA (UNASSIGNED)) (FOSSIL)
- tatarica, Papyridea tatarica Slodkewitsch, 1938 ex Kogan MS † - syn of: Profulvia tatarica Slodkewitsch, 1938 ex Kogan MS † - (CARDIIDAE) (FOSSIL)
- tatarica, Nuculana tatarica Slodkewitsch, 1938 ex Kogan MS † - (NUCULANIDAE) (FOSSIL)
- tatarica, Cecina tatarica (L. von Schrenck, 1867) - (POMATIOPSIDAE)
- tatarica, Prokopievskia tatarica Kanev, 1972 † - (PROKOPIEVSKIIDAE) (FOSSIL)
- tatarica, Abrina tatarica O.A. Scarlato, 1981 - syn of: Macoma calcarea (J.F. Gmelin, 1792) - (SEMELIDAE)
- tatauense, Opisthostoma brachyacrum tatauense J.J. Vermeulen, 1994 - (DIPLOMMATINIDAE)
- Tatea, Genus Tatea J.E. Tenison-Woods, 1879 (TATEIDAE)
- tateana, Atrina tateana (C. Hedley, 1924) - (PINNIDAE)
- tateana, Rissoina tateana J.E. Tenison-Woods, 1876 - (RISSOINIDAE)
- tateana, Alcithoe tateana (Johnston, 1880 †) - (VOLUTIDAE) (FOSSIL)
- tateanus, Clavilithes tateanus R. Tate, 1888 † - (FASCIOLARIIDAE) (FOSSIL)
- tateanus, Ischnochiton tateanus W.T. Bednall, 1897 - (ISCHNOCHITONIDAE)
- tateanus, Rhinus constrictus tateanus R.J.L. Guppy, 1875 - (SIMPULOPSIDAE)
- tatei, Plekocheilus tatei F. Haas, 1955 - (AMPHIBULIMIDAE)
- tatei, Baryspira tatei (J. Marwick, 1924 †) - (ANCILLARIIDAE) (FOSSIL)
- tatei, Lensataphrus tatei J. Gründel & al., 2011 † - (ATAPHRIDAE) (FOSSIL)
- tatei, Pteromya tatei (Richardson & Tutcher, 1916 †) - (CERATOMYIDAE) (FOSSIL)
- tatei, Austromitra tatei G.F. Angas, 1879 - syn of: Austromitra analogica (L.A. Reeve, 1845) - (COSTELLARIIDAE)
- tatei, Leuconopsis tatei J.H. Gatliff, 1905 - syn of: Leuconopsis pellucida (J.G. Cooper, 1841) - (ELLOBIIDAE)
- tatei, Gastrocopta tatei H.A. Pilsbry, 1917 - (GASTROCOPTIDAE)
- tatei, Chanomphalus tatei H.A. Pilsbry, 1903 - (HELICODISCIDAE)
- tatei, Cyclostrema tatei G.F. Angas, 1878 - syn of: Elachorbis tatei (G.F. Angas, 1878) - (LIOTIIDAE)
- tatei, Epicodakia tatei (G.F. Angas, 1879) - (LUCINIDAE)
- tatei, Murchisonia tatei J. Donald, 1892 † - (MURCHISONIIDAE) (FOSSIL)
- tatei, Subpterynotus tatei (J.C. Verco, 1895) - (MURICIDAE)
- tatei, Botula tatei M. Huber, 2010 - (MYTILIDAE)
- tatei, Nassarius tatei J.E. Tenison-Woods, 1878 † - (NASSARIIDAE) (FOSSIL)
- tatei, Hypergonia tatei J. Donald, 1892 † - (ORTHONEMIDAE) (FOSSIL)
- tatei, Cosa tatei (C. Hedley, 1901) - (PHILOBRYIDAE)
- tatei, Tropicorbis tatei H.B. Baker, 1941 - syn of: Biomphalaria helophila (A.V.M.D. D'Orbigny, 1835) - (PLANORBIDAE)
- tatei, Pleuromya tatei Richardson & Tutcher, 1916 † - syn of: Pteromya tatei (Richardson & Tutcher, 1916 †) - (PLEUROMYIDAE) (FOSSIL)
- tatei, Sassia tatei A.G. Beu, 2010 † - (RANELLIDAE) (FOSSIL)
- tatei, Alvania tatei K.H.J. Thiele, 1930 - syn of: Alvania strangei (J.W. Brazier, 1894) - (RISSOIDAE)
- tatei, Thiara tatei (J.B.P.A. Lamarck, 1816) - (THIARIDAE)
- tatei, Elachorbis tatei (G.F. Angas, 1878) - (TORNIDAE)
- tatei, Trigonia tatei G.B. Pritchard, 1895 † - syn of: Trigonia intersitans R. Tate, 1896 † - (TRIGONIIDAE) (FOSSIL)
- tatei, Brachypodella tatei (J.C.H. Crosse, 1872) - (UROCOPTIDAE)
- tatei, Paleomarcia tatei E.M. Fletcher, 1938 † - (VENERIDAE) (FOSSIL)
- tatei, Xenophora tatei G.F. Harris, 1897 † - (XENOPHORIDAE) (FOSSIL)
- tatei socialis, Nassarius tatei socialis F.W. Hutton, 1886 † - syn of: Tritia socialis (F.W. Hutton, 1886 †) - (NASSARIIDAE) (FOSSIL)
- TATEIDAE Thiele, 1925 - Family (GASTROPODA-CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-TRUNCATELLOIDEA [Superfamily])
- tateiformis, Austropyrgus tateiformis A. Clark, W.B. Miller & W.F. Ponder, 2003 - (HYDROBIIDAE)
- tateii, Austromitra analogica tateii (G.F. Angas, 1879) - (COSTELLARIIDAE)
- tateiwai, Batillaria tateiwai J. Makiyama, 1934 † - syn of: Tateiwaia tateiwai (J. Makiyama, 1934 †) - (BATILLARIIDAE) (FOSSIL)
- tateiwai, Meisenia tateiwai Makiyama 1936 † - (CARDIIDA (UNASSIGNED)) (FOSSIL)
- tateiwai, Lophospira tateiwai Kobayashi, 1934 † - syn of: Lophospira perangulata (J.W. Hall, 1847 †) - (LOPHOSPIRIDAE) (FOSSIL)
- tateiwai, Tateiwaia tateiwai (J. Makiyama, 1934 †) - (POTAMIDIDAE) (FOSSIL)
- Tateiwaia, Genus Tateiwaia Makiyama, 1936 † (POTAMIDIDAE) (FOSSIL)
- Tatella, Genus Tatella Etheridge, 1901 † (BIVALVIA INCERTAE SEDIS) (FOSSIL)
- Tatemelon, Genus Tatemelon G.A. Solem, 1993 (CAMAENIDAE)
- Tateshia, Genus Tateshia S. Kosuge, 1986 (MARGINELLIDAE)
- tateyamaensis, Notoplax tateyamaensis W.L. Wu & T.A. Okutani, 1995 ex Taki MS - (ACANTHOCHITONIDAE)
- tateyamaensis, Pyrgiscus tateyamaensis (S. Nomura, 1938) - (PYRAMIDELLIDAE)
- tateyamensis, Nassarius tateyamensis J.T. Kuroda, 1929 - (NASSARIIDAE)
- tateyamensis, Turbonilla tateyamensis S. Nomura, 1938 - (PYRAMIDELLIDAE)
- tateyamensis, Lyrodus tateyamensis Kuronuma, 1931 - syn of: Lyrodus pedicellatus (J.L.A. Quatrefages, 1849) - (TEREDINIDAE)
- tathnae, Neocancilla tathnae C.F. Jickeli, 1874 - syn of: Neocancilla clathrus (J.F. Gmelin, 1791) - (MITRIDAE)
- tathraensis, Austropyrgus tathraensis A. Clark, W.B. Miller & W.F. Ponder, 2003 - (HYDROBIIDAE)
- Tathrella, Genus Tathrella C.F. Laseron, 1959 (PYRAMIDELLIDAE)
- tatianae, Teutonica tatianae A.V. Guzhov, 2003 † - syn of: Teutonica calloviana Grundel, 2001 † - (POLYGYRINIDAE) (FOSSIL)
- Tatianautilus, Genus Tatianautilus Barskov & Shilovsky, 2014 † (PERMONAUTILIDAE) (FOSSIL)
- tatiarae, Sphaerium tatiarae (B.C. Cotton & F.C. Godfrey, 1938) - (SPHAERIIDAE)
- tatirocae, Moitessieria tatirocae A. Tarruella, J. Corbella, L. Prats, G. Guillén & D.M. Alba, 2015 - (MOITESSIERIIDAE)
- tatriana, Nucula tatriana King, 1850 † - (NUCULIDAE) (FOSSIL)
- tatrica, Chondrina tatrica V. Ložek, 1948 - (CHONDRINIDAE)
- tatrica, Spiniloma tatrica (C.A. von Zittel, 1868 †) - (SPINILOMATIDAE) (FOSSIL)
- tatrica, Vertigo tatrica J. Hazay, 1885 - syn of: Vertigo alpestris J. Alder, 1838 - (VERTIGINIDAE)
- tatricum, Ptychophylloceras tatricum (G.G. Pusch, 1837 †) - (PHYLLOCERATIDAE) (FOSSIL)
- tatricus, Aspasita triarius tatricus (J. Hazay, 1883) - (SPELAEODISCIDAE)
- Tatrophylloceras, Subgenus Ptychophylloceras (Tatrophylloceras) Beznosov, 1958 † (PHYLLOCERATIDAE) (FOSSIL)
- tattawuppana, Glyptorhagada tattawuppana G.A. Solem, 1992 - (CAMAENIDAE)
- Tatula, Genus Tatula Polechová, 2013 † (CYCLOCONCHIDAE) (FOSSIL)
- tatunokutiensis, Anadara tatunokutiensis (S. Nomura & K.M. Hatai †) - (ARCIDAE) (FOSSIL)
- tatunokutiensis nagawensis, Anadara tatunokutiensis nagawensis K. Chinzei, 1961 † - (ARCIDAE) (FOSSIL)
- tatutor, Thaumastus tatutor F.P. Jousseaume, 1887 - (MEGASPIRIDAE)
- Tatutor, syn of: Genus Thaumastus J.A. Albers, 1860 (MEGASPIRIDAE)
- tatyanae, Drepanodontus tatyanae M.G. Harasewych & Y.I. Kantor, 2004 - (BUCCINIDAE)
- tatyanae, Calyptoliva tatyanae Y.I. Kantor & P. Bouchet, 2007 - (OLIVIDAE)
- tatzreiteri, Neodidymites tatzreiteri Tozer, 1994 † - (DIDYMITIDAE) (FOSSIL)
- tau, Labyrinthus uncigera tau (H.A. Pilsbry, 1926) - (CAMAENIDAE)
- tau, Euphaedusa tau (O. Böttger, 1877) - (CLAUSILIIDAE)
- tau, Macedonica frauenfeldi tau H. Nordsieck, 1977 - (CLAUSILIIDAE)
- tau cetivora, Euphaedusa tau cetivora (P.M. Heude, 1882) - (CLAUSILIIDAE)
- tau hunana, Euphaedusa tau hunana (P.V. Gredler, 1881) - (CLAUSILIIDAE)
- tau janseniana, Euphaedusa tau janseniana (P.M. Heude, 1885) - (CLAUSILIIDAE)
- tauberi, Micromelania tauberi Sauerzopf, 1952 † - (HYDROBIIDAE) (FOSSIL)
- Taulimax, Subgenus Turcomilax (Taulimax) I.M. Likharev, 1980 (LIMACIDAE)
- Taulimax, syn of: Subgenus Limax (Kasperia) H.H. Godwin-Austen, 1914 (LIMACIDAE)
- taulisensis, Pilsbrya taulisensis A. Zilch, 1953 - (EPIPHRAGMOPHORIDAE)
- taulisensis, Thaumastus taulisensis A. Zilch, 1953 - (MEGASPIRIDAE)
- taumakiensis, Odostomia taumakiensis H.H. Suter, 1908 - (PYRAMIDELLIDAE)
- taumantias, Papuina taumantias C.M. Tapparone-Canefri, 1883 - (CAMAENIDAE)
- taumilapana, Sphenonaias taumilapana (T.A. Conrad, 1855) - (UNIONIDAE)
- taunaisii, Thaumastus taunaisii (A.E.J. Férussac, 1821) - (MEGASPIRIDAE)
- taunasii, Thaumastus taunasii A.E.J. Férussac, 1822 - syn of: Thaumastus taunaisii (A.E.J. Férussac, 1821) - (MEGASPIRIDAE)
- taunayi, Thaumastus taunayi (A.E.J. Férussac, 1821) - (MEGASPIRIDAE)
- taunayi, Vaginulus taunayi A.E.J. Férussac, 1821 - (VERONICELLIDAE)
- taunaysii, Vaginulus taunaysii A.E.J. Férussac, 1821 - (VERONICELLIDAE)
- taunica, Unio taunica W. Kobelt, 1886 - syn of: Unio arcuatus N.R. Bouchard-Chantereaux, 1838 - (UNIONIDAE)
- Tauphaedusa, Subgenus Euphaedusa (Tauphaedusa) H. Nordsieck 2003 (CLAUSILIIDAE)
- taupini, Muricopsis taupini B. Garrigues, 2016 - (MURICIDAE)
- taupoensis, Merelina taupoensis A.W.B. Powell, 1939 - (RISSOIDAE)
- tauranga, Striarcana tauranga C.R. Laws, 1937 - (PYRAMIDELLIDAE)
- taurannense, Clypeomorus taurannense J.F.T. Eydoux & L.F.A. Souleyet in W. Kobelt, 1898 - syn of: Clypeomorus bifasciata (G.B. II Sowerby, 1855) - (CERITHIIDAE)
- taurarcuata, Gibbomodiola taurarcuata F. Sacco, 1898 † - (MYTILIDAE) (FOSSIL)
- Taurasia, Genus Taurasia L.M.D. Bellardi, 1882 (MURICIDAE)
- Tauraxinus, Genus Tauraxinus F. Sacco, 1901 (THYASIRIDAE)
- taurica, Aulacomyella neogeae taurica Kinarisova, 1967 † - (AULACOMYELLIDAE) (FOSSIL)
- taurica, Granopupa rhodia taurica (J.R. Roth, 1839) - (CHONDRINIDAE)
- taurica, Scrobifera taurica (L. Pfeiffer, 1848) - (CLAUSILIIDAE)
- taurica, Hamulina taurica Karakasch, 1907 - (HAMULINIDAE)
- taurica, Helix taurica E.A. Rossmässler, 1837 - syn of: Helicopsis filimargo I. Krynicki, 1833 - (HELICIDAE)
- taurica, Helix lucorum taurica I. Krynicki, 1833 - (HELICIDAE)
- taurica, Lymnaea taurica (S. Clessin, 1880) - (LYMNAEIDAE)
- taurica, Ostrea taurica I. Krynicki, 1837 - syn of: Ostrea edulis C. Linnaeus, 1758 - (OSTREIDAE)
- taurica, Purpuroidea taurica Pcelintsev, 1931 † - (PURPUROIDEIDAE) (FOSSIL)
- taurica, Anodonta taurica J.R. Bourguignat, 1880 - syn of: Anodonta cygnea (C. Linnaeus, 1758) - (UNIONIDAE)
- taurica, Vivipara taurica J.R. Bourguignat, 1880 - syn of: Viviparus listeri (E. Forbes & S.C.T. Hanley, 1849) - (VIVIPARIDAE)
- taurica, Hyalinia taurica S. Clessin, 1881 - syn of: Tauroxychilus diaphanellus (I. Krynicki, 1833) - (ZONITIDAE)
- taurica brjanskii, Scrobifera taurica brjanskii (O.W. Von Rosen, 1911) - (CLAUSILIIDAE)
- taurica martensi, Helix taurica martensi O. Böttger, 1883 - syn of: Helix lucorum C. Linnaeus, 1758 - (HELICIDAE)
- taurica pachyta, Unio taurica pachyta C.A. Westerlund, 1885a - syn of: Lymnaea pachyta (C.A. Westerlund, 1885) - (UNIONIDAE)
- Tauricella, Genus Tauricella Pchelintsev, 1968 † (OPISTHOBRANCHIA (UNASSIGNED)) (FOSSIL)
- tauricola, Truncatellina tauricola W.A. Lindholm, 1926 - syn of: Truncatellina cylindrica (A.E.J. Férussac, 1807) - (VERTIGINIDAE)
- Tauriconites, Genus Tauriconites Kabanov in Drushchits, Kabanov & Nerodenko, 1984 † (BELEMNITIDA (UNASSIGNED)) (FOSSIL)
- tauricum, Dalmasiceras tauricum T.N. Bogdanova & V.V. Arkadiev, 1998 † - (NEOCOMITIDAE) (FOSSIL)
- tauricus, Plathystimulus tauricus (H.R. Simroth, 1885) - (AGRIOLIMACIDAE)
- tauriformis, Rhombuniopsis tauriformis (H.C. Fulton, 1906) - (UNIONIDAE)
- taurimontanum, Taramelliceras taurimontanum (Erni, 1934 †) - (OPPELIIDAE) (FOSSIL)
- taurina, Turricula taurina A.A. Olsson, 1922 † - (CLAVATULIDAE) (FOSSIL)
- taurina, Fusiturricula taurina (A.A. Olsson, 1922) - (DRILLIIDAE)
- taurina, Terebra taurina (J. Lightfoot, 1786) - (TEREBRIDAE)
- Taurinellushka, Genus Taurinellushka I. Balashov, 2014 (PRISTILOMATIDAE)
- taurinensis, Aporrhais meridionalis taurinensis F. Sacco, 1893 † - (APORRHAIDAE) (FOSSIL)
- taurinensis, Clavatula taurinensis (C. Mayer, 1873 †) - (CLAVATULIDAE) (FOSSIL)
- taurinensis, Monacha taurinensis C. Pollonera, 1885 - syn of: Monacha cartusiana (O.F. Müller, 1774) - (HYGROMIIDAE)
- taurinensis, Tectura taurinensis F. Sacco, 1897 † - (LOTTIIDAE) (FOSSIL)
- taurinensis, Lymnaea taurinensis C. Pollonera, 1889 - syn of: Lymnaea stagnalis (C. Linnaeus, 1758) - (LYMNAEIDAE)
- taurinensis, Melanopsis taurinensis F. Sacco, 1889 † - syn of: Melanopsis clava taurinensis F. Sacco, 1889 † - (MELANOPSIDAE) (FOSSIL)
- taurinensis, Melanopsis clava taurinensis F. Sacco, 1889 † - (MELANOPSIDAE) (FOSSIL)
- taurinensis, Dermomurex taurinensis (O.G. Michelotti, 1841 †) - (MURICIDAE) (FOSSIL)
- taurinensis, Murex taurinensis L.M.D. Bellardi & F. Sacco, 1872 - syn of: Hexaplex trunculus (C. Linnaeus, 1758) - (MURICIDAE)
- taurinensis, Neilonella taurinensis La Pernba 2007 † - (NEILONELLIDAE) (FOSSIL)
- taurinensis, Palaeoglandina taurinensis (Sacco, 1886) † - (OLEACINIDAE) (FOSSIL)
- taurinensis, Mioporomya taurinensis Sacco 1901 † - (PHOLADOMYOIDEA (UNASSIGNED)) (FOSSIL)
- taurinensis, Turritella taurinensis O.G. Michelotti, 1847 † - (TURRITELLIDAE) (FOSSIL)
- taurinensis, Petaloconchus glomeratus taurinensis F. Sacco, 1896 † - (VERMETIDAE) (FOSSIL)
- taurinia, Lyria taurinia (G. Bonelli, 1825 †) - (VOLUTIDAE) (FOSSIL)
- Tauroceras, Genus Tauroceras Schafhäutl, 1854 † (GONIATITIDA (UNASSIGNED)) (FOSSIL)
- Tauroceras, syn of: Genus Neopopanoceras Spath , 1951 † (PROCARNITIDAE) (FOSSIL)
- taurocolligens, Sulcogladius collegnoi taurocolligens F. Sacco, 1893 † - (ROSTELLARIIDAE) (FOSSIL)
- taurocompressa, Mesalia taurocompressa F. Sacco, 1895 † - (TURRITELLIDAE) (FOSSIL)
- tauroconicum, Benoistia tauroconicum F. Sacco, 1906 † - syn of: Plesiotrochus fallax (J.P.S. Grateloup, 1832 †) - (BRACHYTREMATIDAE) (FOSSIL)
- tauroconicum, Cerithium tauroconicum F. Sacco, 1895 - (CERITHIIDAE)
- taurogracilis, Fustiaria taurogracilis F. Sacco, 1897 † - (FUSTIARIIDAE) (FOSSIL)
- taurogracilis, Gadilina taurogracilis F. Sacco, 1897 † - (GADILINIDAE) (FOSSIL)
- Tauromeniceras, Genus Tauromeniceras Mouterde , 1967 † (HILDOCERATIDAE) (FOSSIL)
- tauromiliare, Calliostoma tauromiliare (F. Sacco, 1896 †) - (CALLIOSTOMATIDAE) (FOSSIL)
- tauroparva, Brocchinia tauroparva F. Sacco, 1894 † - (CANCELLARIIDAE) (FOSSIL)
- tauroperstriata, Chlamys tauroperstriata F. Sacco, 1897 † - (PECTINIDAE) (FOSSIL)
- tauroperstriaus, Chlamys tauroperstriaus F. Sacco, 1897 † - (PECTINIDAE) (FOSSIL)
- tauroperstriaus persimplicula, Chlamys tauroperstriaus persimplicula F. Sacco, 1897 - (PECTINIDAE)
- tauroperturritus, Turritella tauroperturritus F. Sacco, 1895 † - (TURRITELLIDAE) (FOSSIL)
- taurorotunda, Jousseaumea taurorotunda F. Sacco, 1894 † - (CYPRAEIDAE) (FOSSIL)
- taurorugosus, Lithophaga taurorugosus F. Sacco, 1898 - syn of: Lithophaga corrugata (R.A. Philippi, 1846) - (MYTILIDAE)
- taurostriata, Holandriana patula taurostriata (F. Sacco, 1895 †) - (PLEUROCERIDAE) (FOSSIL)
- Taurotapes, Genus Taurotapes Sacco, 1900 † (CARDIIDA (UNASSIGNED)) (FOSSIL)
- taurovalis, Schilderia taurovalis (F. Sacco, 1894 †) - (CYPRAEIDAE) (FOSSIL)
- Tauroxychilus, Subgenus Oxychilus (Tauroxychilus) Balashov, 2016 (OXYCHILIDAE)
- taurus, Paraceratites taurus Smith, 1914 † - syn of: Silberlingitoides cricki (Smith, 1914 †) - (CERATITIDAE) (FOSSIL)
- taurus, Latirus taurus A.A. Olsson, 1962 - syn of: Hemipolygona carinifera (J.B.P.A. Lamarck, 1816) - (FASCIOLARIIDAE)
- taurus, Melongena consors taurus E.J. Petuch, 1994 † - (MELONGENIDAE) (FOSSIL)
- taurus, Sinustrombus taurus (L.A. Reeve, 1857) - (STROMBIDAE)
- Tauschia, Subgenus Emarginula (Tauschia) Haber, 1932 † (FISSURELLIDAE) (FOSSIL)
- Tautautua, Subgenus Strobilus (Tautautua) C.M. Cooke & Y. Kondo, 1960 (ACHATINELLIDAE)
- tautirana, Cypraea tautirana A. Curtiss, 1938 - syn of: Monetaria obvelata (J.B.P.A. Lamarck, 1810) - (CYPRAEIDAE)
- tautiranus, Murex tautiranus A. Curtiss, 1938 - syn of: Monoplex nicobaricus (P.F. Röding, 1798) - (MURICIDAE)
- tautiranus, Strombus tautiranus A. Curtiss, 1938 - syn of: Lambis robusta (W.J. Swainson, 1821) - (STROMBIDAE)
- tautiranus, Turbo tautiranus A. Curtiss, 1938 - syn of: Littoraria coccinea (J.F. Gmelin, 1791) - (TURBINIDAE)
- Tautraxinus, syn of: Genus Thyasira J.B.P.A. Lamarck, 1818 (THYASIRIDAE)
- tauyensis, Pseudamiantis tauyensis (Yokoyama 1927) † - (VENERIDAE) (FOSSIL)
- tauzini, Pleurofusia tauzini P. Lozouet, 2015 † - (TURRIDAE) (FOSSIL)
- tavaersiana, Achatina tavaersiana P.M.A. Morelet, 1866 - syn of: Achatina tavaresiana P.M.A. Morelet, 1866 - (ACHATINIDAE)
- Tavaniotha, syn of: Genus Nassarius Duméril, 1805 (NASSARIIDAE)
- tavaresiana, Achatina tavaresiana P.M.A. Morelet, 1866 - (ACHATINIDAE)
- tavense, Jeanrogericeras tavense (Faraud, 1940 †) - (ACANTHOCERATIDAE) (FOSSIL)
- tavense, Vascoceras tavense Faraud, 1940 † - syn of: Jeanrogericeras tavense (Faraud, 1940 †) - (VASCOCERATIDAE) (FOSSIL)
- taverai, Torinista taverai D. Frassinetti & Covacevich, 1981 † - (ARCHITECTONICIDAE) (FOSSIL)
- taverai, Glycymeris taverai D. Frassinetti & Covacevich, 1984 † - (GLYCYMERIDIDAE) (FOSSIL)
- taverai, Hegaratella taverai Hoedemaeker, 2016 † - (NEOCOMITIDAE) (FOSSIL)
- taverai, Asthenoceras taverai Sandoval, 2012 † - (SONNINIIDAE) (FOSSIL)
- taverai, Ptychosyrinx taverai C. Nielsen, 2003 † - (TURRIDAE) (FOSSIL)
- taverai, Palaeomelon taverai (J. Stuardo & M. de H. Villarroel, 1974 †) - (VOLUTIDAE) (FOSSIL)
- Taveraidiscus, syn of: Genus Spitidiscus Kilian , 1910 † (BARREMITIDAE) (FOSSIL)
- tavernia, Solariella tavernia W.H. Dall, 1919 - (SOLARIELLIDAE)
- Taviania, syn of: Genus Grovesia Dolin & Ledon, 2002 † (EOCYPRAEIDAE) (FOSSIL)
- tavianii, Papuliscala tavianii P. Bouchet & A. Warén, 1986 - (NYSTIELLIDAE)
- tavianii, Teretia tavianii M. Morassi & A. Bonfitto, 2015 - (RAPHITOMIDAE)
- tavinniensis, Trochomorpha tavinniensis A. Garrett - (TROCHOMORPHIDAE)
- tavoyensis, Parreysia tavoyensis (A.A. Gould, 1843) - (UNIONIDAE)
- tavropodensis, Carinigera megdova tavropodensis (W.A. Fauer, 1993) - (CLAUSILIIDAE)
- tawaense, Eutrephoceras tawaense Furuichi, 1982 † - (NAUTILIDAE) (FOSSIL)
- tawaii, Aspatharia tawaii P.C.A.S.L. Rang, 1835 - syn of: Aspatharia chaiziana (P.C.A.S.L. Rang, 1835) - (IRIDINIDAE)
- tawaii, Anodonta tawaii P.C.A.S.L. Rang, 1835 - syn of: Aspatharia chaiziana (P.C.A.S.L. Rang, 1835) - (UNIONIDAE)
- tawale, Orpiella mouelti tawale Kae - (HELICARIONIDAE)
- Tawera, Genus Tawera J. Marwick, 1927 (VENERIDAE)
- tawhiti, Allodiscus tawhiti B.A. Marshall & G.M. Barker, 2008 - (CHAROPIDAE)
- tawhiti, Cytora tawhiti B.A. Marshall & G.M. Barker, 2007 - (LIAREIDAE)
- tawhitirahia, Polinices tawhitirahia A.W.B. Powell, 1965 - (NATICIDAE)
- tawneyi, Gosseletia tawneyi Reed, 1917 † - (AMBONYCHIIDAE) (FOSSIL)
- tawneyi, Lentidium tawneyi Curry † - (CORBULIDAE) (FOSSIL)
- tawunensis, Besla tawunensis E. Robba, 2013 † - (PYRAMIDELLIDAE) (FOSSIL)
- tawunensis, Turbonilla tawunensis E. Robba, 2013 † - (PYRAMIDELLIDAE) (FOSSIL)
- tawunensis, Megastomia tawunensis E. Robba, 2013 † - (PYRAMIDELLIDAE) (FOSSIL)
- taxandrica, Nucunella taxandrica (Vincent, 1922 †) - (LIMOPSIDAE) (FOSSIL)
- taxea, Clavatula taxea (P.F. Röding, 1798) - (CLAVATULIDAE)
- taxea, Turris taxea P.F. Röding, 1798 - syn of: Clavatula taxea (P.F. Röding, 1798) - (TURRIDAE)
- Taxeodonta, syn of: Genus Paravitrea H.A. Pilsbry, 1898 (ZONITIDAE)
- taxiensis, Euchondria taxiensis Liang, 1980 † - (EUCHONDRIIDAE) (FOSSIL)
- taxiensis, Lepetopsis taxiensis Liang, 1980 † - (LEPETOPSIDAE) (FOSSIL)
- taxisi, Bythiospeum taxisi (D. Geyer, 1907) - (HYDROBIIDAE)
- Taxocardia, Genus Taxocardia Olsson & Harbison, 1953 † (ASTARTIDAE) (FOSSIL)
- taxodonta, Perrierina taxodonta F. Bernard, 1897 - (CYAMIIDAE)
- Taxodontites, Genus Taxodontites Mezzalira, 1974 † (IRIDINIDAE) (FOSSIL)
- Taxonia, Genus Taxonia Finlay, 1926 † (CERITHIIDAE) (FOSSIL)
- taxus, Clavatula taxus J.H. Chemnitz, 1786 - syn of: Clavatula taxea (P.F. Röding, 1798) - (CLAVATULIDAE)
- taxus, Murex taxus L.W. Dillwyn, 1817 - syn of: Clavatula taxea (P.F. Röding, 1798) - (MURICIDAE)
- Taxyceras, Genus Taxyceras Zhuravleva, 1972 † (DISCOSORIDA (UNASSIGNED)) (FOSSIL)
- taxyfabreae, Hypoturrilites taxyfabreae M. Collignon, 1964 † - (TURRILITIDAE) (FOSSIL)
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