- Tifata, syn of: Genus Detracia J.E. Gray in W.H. Turton, 1840 (ELLOBIIDAE)
- tiflecticus, Unio tiflecticus P.M. Pallary, 1923 - syn of: Unio gibbus L. Spengler, 1793 - (UNIONIDAE)
- tiflisiana, Kalitinaia tiflisiana (W.A. Lindholm, 1913) - (HYGROMIIDAE)
- tigaensis, Ganesella tigaensis (H.H. Godwin-Austen, 1891) - (CAMAENIDAE)
- tigaensis, Barcania chaligi tigaensis R.A.M. Brandt, 1958 - (CLAUSILIIDAE)
- Tigammona, syn of: Genus Periglypta A.J. Jukes-Browne, 1914 (VENERIDAE)
- tiganoura, Turbonilla tiganoura S. Nomura, 1936 - (PYRAMIDELLIDAE)
- tiganourana, Turbonilla tiganourana S. Nomura, 1936 - (PYRAMIDELLIDAE)
- tiganourana, Dunkeria tiganourana S. Nomura, 1937 - syn of: Turbonilla tiganourana S. Nomura, 1936 - (PYRAMIDELLIDAE)
- tiganouranus, Naquetia tiganouranus K. Oyama, 1950 † - syn of: Chicoreus asanoi O. Masuda, 1956 † - (MURICIDAE) (FOSSIL)
- tigerina, Codakia tigerina (C. Linnaeus, 1758) - (LUCINIDAE)
- tigerina, Codokia tigerina C. Linnaeus, 1758 - syn of: Codakia tigerina (C. Linnaeus, 1758) - (LUCINIDAE)
- tigerina, Venus tigerina auct. non C. Linnaeus, 1758 - syn of: Codakia distinguenda (G.W. Tryon, 1872) - (VENERIDAE)
- tigerinum, Palliolum tigerinum (Muller, 1776 †) - (PECTINIDAE) (FOSSIL)
- tigerinum, Palliolum tigerinum (O.F. Müller, 1776) - (PECTINIDAE)
- tigerinum laevis, Palliolum tigerinum laevis (T. Pennant, 1777) - (PECTINIDAE)
- tigerinus, Pecten tigerinus Muller, 1776 † - (PECTINIDAE) (FOSSIL)
- tigerinus, Pecten tigerinus O.F. Müller, 1776 - syn of: Palliolum tigerinum (O.F. Müller, 1776) - (PECTINIDAE)
- tigerinus costata, Pecten tigerinus costata J.G. Jeffreys, 1864 - syn of: Palliolum tigerinum (O.F. Müller, 1776) - (PECTINIDAE)
- tigertti, Gangetia tigertti R.A.M. Brandt, 1968 - (STENOTHYRIDAE)
- tigilense, Keenocardium tigilense (Slodkewitsch, 1938 †) - (CARDIIDAE) (FOSSIL)
- tigilensis, Cardiomya tigilensis (Slodkewitsch, 1935 †) - (CUSPIDARIIDAE) (FOSSIL)
- tigilensis, Spisula tigilensis (L. Krishtofovich, 1947 †) - (MACTRIDAE) (FOSSIL)
- tigilensis, Mya tigilensis L. Krishtofovich, 1947 † - (MYIDAE) (FOSSIL)
- tigilensis, Acharax tigilensis (L. Krishtofovich, 1981 †) - (SOLEMYIDAE) (FOSSIL)
- tigilensis, Eosolen tigilensis Slodkewitsch, 1981 † - syn of: Eosolen eugenensis (Clark, 1925 †) - (SOLENIDAE) (FOSSIL)
- tigilensis, Macoma tigilensis L. Krishtofovich, 1947 † - (TELLINIDAE) (FOSSIL)
- tigilensis, Pitar tigilensis L. Krishtofovich, 1947 † - syn of: Katherinella arnoldi (C.S. Weaver, 1916 †) - (VENERIDAE) (FOSSIL)
- tigilensis, Nampiella tigilensis (Slodkewitsch, 1938 †) - (YOLDIIDAE) (FOSSIL)
- tigiliana, Crassostrea tigiliana Slodkewitsch, 1938 † - (OSTREIDAE) (FOSSIL)
- tigillum, Dentalium tigillum M. Yokoyama, 1931 † - (DENTALIIDAE) (FOSSIL)
- tignum, Dentalium tignum P.H. Colman, 1958 - syn of: Paradentalium hemileuron (J.C. Verco, 1911) - (DENTALIIDAE)
- tigonella, Glycymeris tigonella T.A. Conrad, 1833 † - syn of: Glycymeris trigonella T.A. Conrad, 1833 † - (GLYCYMERIDIDAE) (FOSSIL)
- tigorfatensis, Xerosecta tigorfatensis P.M. Pallary, 1936 - (HYGROMIIDAE)
- tigra, Trigonoclymenia tigra Nikolaeva & Ivanovich, 2005 † - (PLATYCLYMENIIDAE) (FOSSIL)
- tigrae, Liguus fasciatus tigrae L.O. Alcalde, 1944 - (ORTHALICIDAE)
- tigrensis, Falcimytilus tigrensis (Blanford, 1870 †) - (MYTILIDAE) (FOSSIL)
- tigreum, Terebra tigreum P.D. Montfort, 1810 - syn of: Terebra subulata (C. Linnaeus, 1767) - (TEREBRIDAE)
- tigri, Limax tigri D. Lupu, 1973 - syn of: Lehmannia marginata (O.F. Müller, 1774) - (LIMACIDAE)
- tigridella, Oliva tigridella P.L. Duclos, 1835 - (OLIVIDAE)
- tigridella blanda, Oliva tigridella blanda F.P. Marrat, 1867 - (OLIVIDAE)
- tigridella lacteana, Oliva tigridella lacteana P. Dautzenberg, 1927 - (OLIVIDAE)
- tigridella martinii, Oliva tigridella martinii P. Dautzenberg, 1927 - (OLIVIDAE)
- tigridella oriola, Oliva tigridella oriola J.B.P.A. Lamarck, 1811 - (OLIVIDAE)
- tigridella samarensis, Oliva tigridella samarensis C.W. Johnson, 1915 - (OLIVIDAE)
- tigridella stellata, Oliva tigridella stellata (P.L. Duclos, 1835) - (OLIVIDAE)
- tigridis, Unio tigridis J.R. Bourguignat, 1852 - (UNIONIDAE)
- tigridis terminalis, Unio tigridis terminalis J.R. Bourguignat, 1852 - syn of: Unio tigridis J.R. Bourguignat, 1852 - (UNIONIDAE)
- tigrina, Achatina zebra tigrina (H.H. Beck, 1837) - (ACHATINIDAE)
- tigrina, Aplysia tigrina P.C.A.S.L. Rang, 1828 - syn of: Aplysia dactylomela P.C.A.S.L. Rang, 1828 - (APLYSIIDAE)
- tigrina, Armina tigrina C.S. Rafinesque, 1814 - (ARMINIDAE)
- tigrina, Caelatura tigrina R.S. Absalão, 2002 - (BARLEEIIDAE)
- tigrina, Burnupena papyracea tigrina (L.C. Kiener, 1834) - (BUCCINIDAE)
- tigrina, Euplica tigrina P.L. Duclos, 1840 - syn of: Euplica scripta (J.B.P.A. Lamarck, 1822) - (COLUMBELLIDAE)
- tigrina, Columbella tigrina P.L. Duclos, 1840 - syn of: Euplica scripta (J.B.P.A. Lamarck, 1822) - (COLUMBELLIDAE)
- tigrina, Cypraea tigrina J.B.P.A. Lamarck, 1822 - syn of: Cypraea pantherina J. Lightfoot, 1786 - (CYPRAEIDAE)
- tigrina, Cypraea tigrina J.F. Gmelin, 1791 - syn of: Cypraea tigris C. Linnaeus, 1758 - (CYPRAEIDAE)
- tigrina, Dendrodoris tigrina J.V. Audouin, 1809 - syn of: Dendrodoris limbata (G.L.C.F.D. Cuvier, 1804) - (DENDRODORIDIDAE)
- tigrina, Dimya tigrina F.M. Bayer, 1971 - (DIMYIDAE)
- tigrina, Otala tigrina G. Servain, 1880 - syn of: Otala punctata (O.F. Müller, 1774) - (HELICIDAE)
- tigrina, Mitra tigrina A. Adams, 1853 - syn of: Strigatella pica (L.W. Dillwyn, 1817) - (MITRIDAE)
- tigrina, Cochlis tigrina (J.L.M. Defrance, 1825 †) - (NATICIDAE) (FOSSIL)
- tigrina, Notocochlis tigrina (P.F. Röding, 1798) - (NATICIDAE)
- tigrina, Natica tigrina J.L.M. Defrance, 1825 † - syn of: Natica crassiuscula J.P.S. Grateloup, 1847 † - (NATICIDAE) (FOSSIL)
- tigrina, Oliva tigrina J.B.P.A. Lamarck, 1811 - (OLIVIDAE)
- tigrina, Paracrostoma tigrina F. Köhler & M. Glaubrecht, 2007 - (PACHYCHILIDAE)
- tigrina, Potadoma freethi tigrina M. Connolly, 1938 - (PACHYCHILIDAE)
- tigrina, Rathouisia tigrina (P.M. Heude, 1882) - (RATHOUISIIDAE)
- tigrina, Terebra tigrina (J.F. Gmelin, 1791) - syn of: Oxymeris felina (L.W. Dillwyn, 1817) - (TEREBRIDAE)
- tigrina, Isotriphora tigrina M.R. Fernandes, A. Pimenta & J.H. Leal, 2013 - (TRIPHORIDAE)
- tigrina, Oxystele tigrina (H.E. Anton, 1838) - (TROCHIDAE)
- tigrina, Turbinella tigrina J.B. Hombron & C.H. Jacquinot, 1852 - syn of: Pollia wagneri (H.E. Anton, 1838) - (TURBINELLIDAE)
- tigrina, Lophiotoma tigrina (J.B.P.A. Lamarck, 1822) - (TURRIDAE)
- tigrina, Turritella tigrina L.C. Kiener - syn of: Turritella leucostoma A. Valenciennes, 1832 - (TURRITELLIDAE)
- tigrina, Lioconcha tigrina (J.B.P.A. Lamarck, 1818) - (VENERIDAE)
- tigrina, Alcithoe tigrina P. Bail & A. Limpus, 2005 - syn of: Alcithoe larochei tigrina P. Bail, A. Limpus & Y. Terryn, 2005 - (VOLUTIDAE)
- tigrina, Alcithoe larochei tigrina P. Bail, A. Limpus & Y. Terryn, 2005 - (VOLUTIDAE)
- tigrina fallax, Oliva tigrina fallax C.W. Johnson, 1910 - (OLIVIDAE)
- tigrina glandiformis, Oliva tigrina glandiformis F.P. Marrat, 1871 - (OLIVIDAE)
- tigrinaeformis, Turris tigrinaeformis S. Nomura, 1936 - (TURRIDAE)
- tigrinella, Aplysia tigrinella J.E. Gray, 1850 - (APLYSIIDAE)
- tigrinum, Buccinum tigrinum J.F. Gmelin, 1791 - syn of: Oxymeris felina (L.W. Dillwyn, 1817) - (BUCCINIDAE)
- tigrinum, Buccinum tigrinum L.C. Kiener, 1834 - syn of: Burnupena pubescens (H.C. Küster, 1858) - (BUCCINIDAE)
- tigrinum, Epitonium tigrinum P.F. Röding, 1798 - (EPITONIIDAE)
- tigrinum, Siphopteron tigrinum T.M. Gosliner, 1989 - (GASTROPTERIDAE)
- tigrinum, Cingulifera cingulatum tigrinum (G.J. De Cristofori & G. Jan, 1832) - (HELICIDAE)
- tigrinum, Onchidium tigrinum F. Stoliczka, 1869 - (ONCHIDIIDAE)
- tigrinum, Palliolum tigrinum O.F. Müller, 1776 - syn of: Palliolum tigerinum (O.F. Müller, 1776) - (PECTINIDAE)
- tigrinum, Cymatium tigrinum (W.J. Broderip, 1833) - (RANELLIDAE)
- tigrinus, Drymaeus tigrinus S.I. Da Costa, 1898 - (BULIMULIDAE)
- tigrinus, Chiton tigrinus C.F.F. von Krauss, 1848 - syn of: Ischnochiton textilis (J.E. Gray, 1828) - (CHITONIDAE)
- tigrinus, Conus tigrinus G.B. II Sowerby, 1858 - syn of: Cylinder textile (C. Linnaeus, 1758) - (CONIDAE)
- tigrinus, Cyclophorus tigrinus (G.B. Sowerby, 1843) - (CYCLOPHORIDAE)
- tigrinus, Ischnochiton tigrinus (C.F.F. von Krauss, 1848) - (ISCHNOCHITONIDAE)
- tigrinus, Malleus tigrinus L.A. Reeve, 1858 - syn of: Malleus anatinus (J.F. Gmelin, 1791) - (MALLEIDAE)
- tigrinus, Naticarius tigrinus Nordsieck, 1972 † - syn of: Cochlis neglecta (C. Mayer, 1858 †) - (NATICIDAE) (FOSSIL)
- tigrinus, Palliolum tigrinus O.F. Müller, 1776 - syn of: Palliolum tigerinum (O.F. Müller, 1776) - (PECTINIDAE)
- tigrinus, Pecten tigrinus L.A. Reeve, 1853 - syn of: Palliolum tigerinum (O.F. Müller, 1776) - (PECTINIDAE)
- tigrinus unicolor, Ischnochiton tigrinus unicolor H.A. Pilsbry, 1893 - (ISCHNOCHITONIDAE)
- tigris, Drymaeus vexillum tigris (W.J. Broderip, 1832) - (BULIMULIDAE)
- tigris, Calliostoma tigris (J.F. Gmelin, 1791) - (CALLIOSTOMATIDAE)
- tigris, Venustas tigris J.F. Gmelin, 1791 - syn of: Calliostoma tigris (J.F. Gmelin, 1791) - (CALLIOSTOMATIDAE)
- tigris, Achatinelloides tigris H.H. Godwin-Austen, 1881 - (CERASTUIDAE)
- tigris, Grandinenia fuchsi tigris (C.K. Chang, 2005) - (CLAUSILIIDAE)
- tigris, Conus tigris P.F. Röding, 1798 - syn of: Dendroconus betulinus (C. Linnaeus, 1758) - (CONIDAE)
- tigris, Leptopoma tigris J.T. Kuroda & T. Kano, 1941 - (CYCLOPHORIDAE)
- tigris, Cypraea tigris C. Linnaeus, 1758 - (CYPRAEIDAE)
- tigris, Contradusta tigris P. Dautzenberg, 1902 - syn of: Contradusta bregeriana (J.C.H. Crosse, 1868) - (CYPRAEIDAE)
- Tigris, syn of: Genus Cypraea C. Linnaeus, 1758 (CYPRAEIDAE)
- tigris, Dupotetia tigris F.L.P. Gervais - (HELICIDAE)
- tigris, Limax tigris O. Böttger, 1886 - syn of: Caspilimax keyserlingi (E.C. Von Martens, 1880) - (LIMACIDAE)
- tigris, Nerita tigris C.A. Récluz, 1850 - syn of: Neritina virginea (C. Linnaeus, 1758) - (NERITIDAE)
- tigris, Cuspivolva tigris (A. Yamamoto, 1971) - (OVULIDAE)
- tigris, Primovula tigris A. Yamamoto, 1971 - syn of: Cuspivolva tigris (A. Yamamoto, 1971) - (OVULIDAE)
- tigris, Pecten tigris J.B.P.A. Lamarck, 1819 - syn of: Semipallium flavicans (C. Linnaeus, 1758) - (PECTINIDAE)
- tigris, Semipallium tigris J.B.P.A. Lamarck, 1819 - syn of: Semipallium flavicans (C. Linnaeus, 1758) - (PECTINIDAE)
- tigris, Roboastra tigris M. Farmer, 1978 - (POLYCERIDAE)
- tigris, Coriophora tigris (C.F. Laseron, 1958) - (TRIPHORIDAE)
- tigris, Nanaphora tigris C.F. Laseron, 1958 - syn of: Coriophora tigris (C.F. Laseron, 1958) - (TRIPHORIDAE)
- tigris, Trochus tigris J.F. Gmelin, 1791 - syn of: Calliostoma tigris (J.F. Gmelin, 1791) - (TROCHIDAE)
- tigris, Turritella tigris L.C. Kiener - syn of: Turritella leucostoma A. Valenciennes, 1832 - (TURRITELLIDAE)
- tigris, Meretrix tigris K.Y. Lai & Nien, 2008 - (VENERIDAE)
- tigris albina, Dupotetia tigris albina (G. Servain, 1880) - (HELICIDAE)
- tigris chathamensis, Venustas tigris chathamensis R.K. Dell, 1950 - syn of: Calliostoma tigris (J.F. Gmelin, 1791) - (CALLIOSTOMATIDAE)
- tigris incana, Cypraea tigris incana G.R. Sulliotti, 1924 - syn of: Cypraea tigris C. Linnaeus, 1758 - (CYPRAEIDAE)
- tigris lyncichroa, Cypraea tigris lyncichroa J.C. Melvill, 1888 - syn of: Cypraea tigris C. Linnaeus, 1758 - (CYPRAEIDAE)
- tigris lyncicrosa, Cypraea tigris lyncicrosa W.R. Steadman & B.C. Cotton, 1943 - (CYPRAEIDAE)
- tigris olgiatiana, Cypraea tigris olgiatiana L. Bozzetti, 2009 - (CYPRAEIDAE)
- tigris pardalis, Cypraea tigris pardalis G. Shaw, 1795 - (CYPRAEIDAE)
- tigris schilderiana, Cypraea tigris schilderiana C.N. Cate, 1961 - (CYPRAEIDAE)
- tigris tuberculifera, Cypraea tigris tuberculifera G.R. Sulliotti, 1924 - syn of: Cypraea tigris C. Linnaeus, 1758 - (CYPRAEIDAE)
- tigroidellum, Glyphostoma tigroidellum R.P.J. Hervier, 1896 - (CLATHURELLIDAE)
- tigroides, Latirus tigroides R.N. Kilburn, 1975 - (FASCIOLARIIDAE)
- tigurica, Anodonta tigurica G. Servain, 1885 - syn of: Anodonta cygnea (C. Linnaeus, 1758) - (UNIONIDAE)
- tigvenius, Limax tigvenius A.V. Grossu, 1969 - syn of: Malacolimax tenellus (O.F. Müller, 1774) - (LIMACIDAE)
- tihanyca, Anodonta tihanyca G. Servain, 1881 - syn of: Anodonta cygnea (C. Linnaeus, 1758) - (UNIONIDAE)
- tihanyensis, Melanopsis tihanyensis W.A. Wenz, 1928 † - syn of: Melanopsis brusinai Lörenthey, 1902 † - (MELANOPSIDAE) (FOSSIL)
- tihanyensis, Valvata tihanyensis Lörenthey, 1906 † - (VALVATIDAE) (FOSSIL)
- tihense, Pachycrommium tihense Pacaud, 2016 † - (AMPULLINIDAE) (FOSSIL)
- tihensis, Plagiostoma tihensis Abbass, 1962 † - (LIMIDAE) (FOSSIL)
- tihensis, Dilatilabrum tihensis Abbass, 1963 † - (STROMBIDAE) (FOSSIL)
- tihensis, Trochus tihensis Abbass, 1967 † - (TROCHIDAE) (FOSSIL)
- Tihkia, Genus Tihkia Sahni, 1955 (SILESUNIONIDAE) (FOSSIL)
- tijerensis, Valanginites tijerensis Imlay, 1937 † - (OLCOSTEPHANIDAE) (FOSSIL)
- tikhyi, Homoctenus tikhyi Lyaschenko, 1959 † - (HOMOCTENIDAE) (FOSSIL)
- tiki, Conasprella tiki (R.G. Moolenbeek, A. Zandbergen & P. Bouchet, 2008) - (CONIDAE)
- tiki, Bathyconus tiki R.G. Moolenbeek, A. Zandbergen & P. Bouchet, 2008 - syn of: Conasprella tiki (R.G. Moolenbeek, A. Zandbergen & P. Bouchet, 2008) - (CONIDAE)
- Tikia, Genus Tikia Marwick, 1927 (CARDIIDA (UNASSIGNED)) (FOSSIL)
- tikkoensis, Turbonilla tikkoensis (S. Nomura, 1936) - (PYRAMIDELLIDAE)
- tikkoensis, Chemnitzia tikkoensis S. Nomura, 1936 - syn of: Turbonilla tikkoensis (S. Nomura, 1936) - (PYRAMIDELLIDAE)
- tilarniocensis, Anoptychia tilarniocensis F. Haas, 1953 † - (ANOPTYCHIIDAE) (FOSSIL)
- tilarniocensis, Cryptaulax tilarniocensis F. Haas, 1953 † - (CRYPTAULACIDAE) (FOSSIL)
- tilarniocensis, Conactaeon tilarniocensis F. Haas, 1953 † - (CYLINDROBULLINIDAE) (FOSSIL)
- tilarniocensis, Teretrina tilarniocensis F. Haas, 1953 † - (MATHILDIDAE) (FOSSIL)
- tilbrooki, Lucilina tilbrooki J.N. Milne, 1958 - (CHITONIDAE)
- tildiana, Atlasica tildiana P.M. Pallary, 1921 - (HELICIDAE)
- tilei, Helicina tilei L. Pfeiffer, 1847 - (HELICINIDAE)
- tilesii, Actinodoris tilesii G.T. Tilesius in J.E. Gray, 1850 - syn of: Dendrodoris fumata (W.P.E.S. Rüppell & F.S. Leuckart, 1830) - (CHROMODORIDIDAE)
- tilesii, Dendrodoris tilesii J.E. Gray, 1850 - syn of: Dendrodoris fumata (W.P.E.S. Rüppell & F.S. Leuckart, 1830) - (DENDRODORIDIDAE)
- tilesii, Tergipes tilesii H.M.D. de Blainville, 1825 - (FIONIDAE)
- tilesii, Plocamopherus tilesii (L.S.R. Bergh, 1877) - (POLYCERIDAE)
- Tilicrassatella, Genus Tilicrassatella DeVries, 2016 (CRASSATELLIDAE) (FOSSIL)
- tillamookensis, Bathyneaera tillamookensis (W.H. Dall, 1916) - (CUSPIDARIIDAE)
- tillesae, Murchisonia tillesae Blodgett & Johnson, 1992 † - (MURCHISONIIDAE) (FOSSIL)
- tillierae, Laevityphis tillierae (R. Houart, 1986) - (MURICIDAE)
- tillieri, Malagarion tillieri K.C. Emberton & T.A. Pearce, 2000 - (ARIOPHANTIDAE)
- tillieri, Salvinia tillieri M.R. Alonso, C.M. Ibáñez & C.E. Ponte-Lira, 2003 - (CANARIELLIDAE)
- tillmanni, Dentimargo tillmanni J. Espinosa & J.A. Ortea, 2013 - (MARGINELLIDAE)
- tiloriensis, Psadara tiloriensis (G.F. Angas, 1879) - (PLEURODONTIDAE)
- tiltoni, Streblochondria tiltoni Busanus & Hoare, 1991 † - (STREBLOCHONDRIIDAE) (FOSSIL)
- Tiltoniceras, Genus Tiltoniceras Buckman , 1913 (HILDOCERATIDAE) (FOSSIL)
- timacensis, Melanopsis timacensis ivkovic, 1893 † - (MELANOPSIDAE) (FOSSIL)
- timalthea, Formosana timalthea (E.R. Sykes, 1898) - (CLAUSILIIDAE)
- timanica, Crassilina timanica Lyashenko, 1957 † - (CRASSILINIDAE) (FOSSIL)
- timanicum, Jaregoceras timanicum P.A. Zhuravleva, 1972 † - syn of: Ukhtoceras uchtense (Holzapfel, 1899 †) - (DISCOSORIDA (unassigned)) (FOSSIL)
- timanicum, Elaphoceras timanicum P.A. Zhuravleva, 1972 † - syn of: Gonatocyrtoceras guerichi (E.S. Sobolev, 1912 †) - (DISCOSORIDA (unassigned)) (FOSSIL)
- timanicum, Vertorhizoceras timanicum P.A. Zhuravleva, 1972 † - syn of: Ukhtoceras uchtense (Holzapfel, 1899 †) - (NAUTILIDA (unassigned)) (FOSSIL)
- timanicum, Nordiceras timanicum (Holzapfel, 1899 †) - (NORDICERATIDAE) (FOSSIL)
- timanicus, Devonocheilus timanicus (Holzapfel, 1899 †) - (ARCHIACOCERATIDAE) (FOSSIL)
- timanicus, Pteronites timanicus Maslennikov, 1935 † - (PINNIDAE) (FOSSIL)
- timanicus, Prolecanites timanicus Holzapfel, 1899 † - syn of: Nordiceras timanicum (Holzapfel, 1899 †) - (PROLECANITIDAE) (FOSSIL)
- Timanites, Genus Timanites Mojsisovics , 1882 (KOENENITIDAE) (FOSSIL)
- Timanoceras, Genus Timanoceras Bogoslovsky , 1957 (GEPHUROCERATIDAE) (FOSSIL)
- Timasensus, syn of: Genus Chloritis H.H. Beck, 1837 (CAMAENIDAE)
- Timbellus, Subgenus Pterynotus (Timbellus) A. De Gregorio, 1885 (MURICIDAE)
- timeae, Montenegrina timeae Z. Eröss & M. Szekeres, 2006 - (CLAUSILIIDAE)
- timei, Cernuella timei W. Kobelt, 1907 - syn of: Cernuella virgata (E.M. Da Costa, 1778) - (HYGROMIIDAE)
- timessus, Fusinus timessus (W.H. Dall, 1889) - (FASCIOLARIIDAE)
- timetus, Latisipho timetus (W.H. Dall, 1919) - (BUCCINIDAE)
- timetus, Colus timetus W.H. Dall, 1919 - syn of: Latisipho timetus (W.H. Dall, 1919) - (BUCCINIDAE)
- timia, Taringa aivica timia Er. Marcus & Ev. Marcus, 1967 - (DISCODORIDIDAE)
- timida, Aeolidia timida S. Trinchese, 1873 - (AEOLIDIIDAE)
- timida, Monia timida T. Iredale, 1939 - (ANOMIIDAE)
- timida, Eonomia timida F.T. Fürsich & T.J. Palmer, 1981 † - (ANOMIIDAE) (FOSSIL)
- timida, Cuthona timida S. Trinchese, 1874 - syn of: Cuthona miniostriata (R.L. Schmekel, 1968) - (FIONIDAE)
- timida, Purpura timida G.H. Schubert & J.A. Wagner, 1829 - syn of: Purpura bufo (J.B.P.A. Lamarck, 1822) - (MURICIDAE)
- timida, Elysia timida (A. Risso, 1818) - (PLAKOBRANCHIDAE)
- timida, Elimia timida (C. Goodrich, 1942) - (PLEUROCERIDAE)
- timida, Costosyrnola timida E. Saurin, 1962 - (PYRAMIDELLIDAE)
- timida, Duplicaria timida (J. Marwick, 1931 †) - (TEREBRIDAE) (FOSSIL)
- timidum, Pristeroceras timidum Ruedemann, 1925 † - syn of: Hexameroceras panderi (Barrande, 1865 †) - (PHRAGMOCERATIDAE) (FOSSIL)
- timidum, Cyclonema timidum J. Perner, 1903 † - (PLATYCERATIDAE) (FOSSIL)
- timidum, Domanikoceras timidum Becker & House, 1993 † - (TORNOCERATIDAE) (FOSSIL)
- timidus, Notarchus timidus A. Risso, 1818 - syn of: Elysia timida (A. Risso, 1818) - (APLYSIIDAE)
- timidus, Arion timidus H.R. Simroth, 1891 - (ARIONIDAE)
- timidus, Paracladiscites timidus Mojsisovics, 1896 † - (CLADISCITIDAE) (FOSSIL)
- timidus, Goniobasis floridensis timidus (C. Goodrich, 1942) - (PLEUROCERIDAE)
- timisensis, Theodoxus timisensis E. Jekelius, 1944 † - (NERITIDAE) (FOSSIL)
- Timisia, Genus Timisia Jekelius, 1944 (ARCHAEOGASTROPODA (UNASSIGNED)) (FOSSIL)
- timisiensis, Hydrobia timisiensis E. Jekelius, 1944 † - (HYDROBIIDAE) (FOSSIL)
- timmii, Bithynia timmii D.A. Odabasi & Arslan, 2015 - (BITHYNIIDAE)
- Timoceras, Genus Timoceras Dagis & Ermakova, 1988 (SIBIRITIDAE) (FOSSIL)
- Timoclaea, syn of: Genus Timoclea T. Brown, 1827 (VENERIDAE)
- Timoclea, Genus Timoclea T. Brown, 1827 (VENERIDAE)
- Timodea, syn of: Genus Timoclea T. Brown, 1827 (VENERIDAE)
- timor, Peristarium timor (M.G. Harasewych, 1983) - (TURBINELLIDAE)
- timora, Scissurella timora J.C. Melvill & R. Standen, 1912 - syn of: Scissurella petermannensis É. Lamy, 1910 - (SCISSURELLIDAE)
- timorense, Atomodesma timorense J. Wanner, 1922 † - (ATOMODESMATIDAE) (FOSSIL)
- timorense, Clypeoceras timorense (J. Wanner, 1911 †) - (CLYPEOCERATIDAE) (FOSSIL)
- timorense, Stacheoceras timorense (Haniel, 1915 †) - (NEOSTACHEOCERATIDAE) (FOSSIL)
- timorense, Atahococeras timorense Niko & al., 2000 † - (SPYROCERATIDAE) (FOSSIL)
- timorensis, Epadrianites timorensis (Boehm, 1907 †) - (ADRIANITIDAE) (FOSSIL)
- timorensis, Opisoma timorensis Krumbeck, 1923 † - syn of: Opisoma excavatum Boehm, 1884 † - (ASTARTIDAE) (FOSSIL)
- timorensis, Koninckites timorensis Renz & Renz, 1948 † - (BEYRICHITIDAE) (FOSSIL)
- timorensis, Borsonia timorensis (M.M. Schepman, 1913) - (BORSONIIDAE)
- timorensis, Paracladiscites timorensis Arthaber, 1927 † - syn of: Paracladiscites multilobatus (H.G. Bronn, 1832 †) - (CLADISCITIDAE) (FOSSIL)
- timorensis, Phaedusa timorensis H. Nordsieck, 2007 - (CLAUSILIIDAE)
- timorensis, Surcula timorensis M.M. Schepman, 1913 - syn of: Borsonia timorensis (M.M. Schepman, 1913) - (CLAVATULIDAE)
- timorensis, Prenkites timorensis Spath, 1930 † - (COLUMBITIDAE) (FOSSIL)
- timorensis, Textilia timorensis (C.H. Hwass in J.G. Bruguière, 1792) - (CONIDAE)
- timorensis, Pusia timorensis W.L.H. Dohrn, 1864 - syn of: Pusia pisolinum (J.B.P.A. Lamarck, 1811) - (COSTELLARIIDAE)
- timorensis, Erosaria timorensis A. Kenyon, 1902 - syn of: Erosaria helvola (C. Linnaeus, 1758) - (CYPRAEIDAE)
- timorensis, Anisodoris timorensis L.S.R. Bergh, 1905 - (DISCODORIDIDAE)
- timorensis, Drillia timorensis M.M. Schepman, 1913 - syn of: Thelecytharella timorensis (M.M. Schepman, 1913) - (DRILLIIDAE)
- timorensis, Latirus timorensis Martin, 1884 † - (FASCIOLARIIDAE) (FOSSIL)
- timorensis, Pseudoflemingites timorensis (Spath, 1930 †) - (FLEMINGITIDAE) (FOSSIL)
- timorensis, Scintilla timorensis G.P. Deshayes, 1856 - syn of: Scintilla timoriensis G.P. Deshayes, 1856 - (GALEOMMATIDAE)
- timorensis, Nuculana timorensis Krumbeck, 1924 † - (NUCULANIDAE) (FOSSIL)
- timorensis, Pachymegalodon timorensis (Krumbeck, 1923 †) - (PACHYRISMATIDAE) (FOSSIL)
- timorensis, Paragoceras timorensis Spath, 1934 † - (PARAGOCERATIDAE) (FOSSIL)
- timorensis, Krumbeckiella timorensis (Krumbeck, 1924 †) - (PERGAMIDIIDAE) (FOSSIL)
- timorensis, Timoria timorensis Krumbeck, 1924 † - syn of: Krumbeckiella timorensis (Krumbeck, 1924 †) - (PERGAMIDIIDAE) (FOSSIL)
- timorensis, Metapronorites timorensis (Haniel, 1915 †) - (PRONORITIDAE) (FOSSIL)
- timorensis, Thelecytharella timorensis (M.M. Schepman, 1913) - (PSEUDOMELATOMIDAE)
- timorensis, Lioglyphostomella timorensis (M.M. Schepman, 1913) - syn of: Thelecytharella timorensis (M.M. Schepman, 1913) - (PSEUDOMELATOMIDAE)
- timorensis, Solen timorensis R.W. Dunker, 1852 - (SOLENIDAE)
- timorensis, Stenothyra paludicola timorensis R.E. Golding, 2014 - (STENOTHYRIDAE)
- timorensis, Tellina timorensis (J.B.P.A. Lamarck, 1818) - (TELLINIDAE)
- timorensis, Ammotibetites timorensis Krystyn, 1982 † - (TIBETITIDAE) (FOSSIL)
- timorensis, Videna timorensis (E.C. Von Martens, 1867) - (TROCHOMORPHIDAE)
- timorensis, Ptychosyrinx timorensis (J.J. Tesch, 1915) - (TURRIDAE)
- timorensis teschi, Ptychosyrinx timorensis teschi A.W.B. Powell, 1964 - syn of: Gemmula teschi (A.W.B. Powell, 1964) - (TURRIDAE)
- timoria, Oliva incrassata timoria P.L. Duclos, 1840 - (OLIVIDAE)
- Timoria, syn of: Genus Krumbeckiella Ichikawa, 1958 (PERGAMIDIIDAE) (FOSSIL)
- Timoriena, syn of: Genus Carinaria J.B.P.A. Lamarck, 1801 (CARINARIIDAE)
- timoriensis, Scintilla timoriensis G.P. Deshayes, 1856 - (GALEOMMATIDAE)
- Timorites, Genus Timorites Haniel , 1915 (CYCLOLOBIDAE) (FOSSIL)
- timotheanus, Tetragonites timotheanus (Pictet 1847 †) - (TETRAGONITIDAE) (FOSSIL)
- Timothynus, Genus Timothynus G.F. Harris, 1946 (UNGULINIDAE)
- tina, Cuthona tina (Er. Marcus, 1957) - (FIONIDAE)
- tinae, Colchidites tinae Kakabadze, 1971 † - (ANCYLOCERATIDAE) (FOSSIL)
- tinajaense, Opisthosiphon subobturatum tinajaense C. de la Torre & P. Bartsch, 1941 - (POMATIIDAE)
- Tinalucina, Genus Tinalucina R. von Cosel, 2006 (LUCINIDAE)
- tinanti, Digonioceras tinanti Rulleau, 2008 † - (CENOCERATIDAE) (FOSSIL)
- tinarooensis, Spurlingia tinarooensis T. Iredale, 1937 - syn of: Spurlingia dunkiensis (E. Forbes, 1851) - (CAMAENIDAE)
- tincta, Achatina tincta L.A. Reeve, 1842 - (ACHATINIDAE)
- tincta, Barleeia tincta R.J.L. Guppy, 1895 - (BARLEEIIDAE)
- tincta, Pollia tincta T.A. Conrad, 1846 - syn of: Gemophos tinctus (T.A. Conrad, 1846) - (BUCCINIDAE)
- tincta, Clathurella tincta L.A. Reeve, 1846 - syn of: Pseudodaphnella tincta (L.A. Reeve, 1846) - (CLATHURELLIDAE)
- tincta, Leptothyra tincta W.H. Dall, 1889 - syn of: Homalopoma indutum (R.B. Watson, 1879) - (COLLONIIDAE)
- tincta, Steironepion tincta (P.P. Carpenter, 1864) - (COLUMBELLIDAE)
- tincta, Doris tincta W.H. Pease, 1863 - syn of: Doris nucleola (W.H. Pease, 1860) - (DORIDIDAE)
- tincta, Myadora tincta L.A. Reeve, 1844 - syn of: Myadora trigona L.A. Reeve, 1844 - (MYOCHAMIDAE)
- tincta, Nacella tincta A. de Rochebrune & J.F. Mabille, 1885 - syn of: Nacella magellanica (J.F. Gmelin, 1791) - (NACELLIDAE)
- tincta, Patella tincta A. de Rochebrune & J.F. Mabille, 1885 - syn of: Nacella magellanica (J.F. Gmelin, 1791) - (PATELLIDAE)
- tincta, Chlamys tincta L.A. Reeve, 1853 - syn of: Talochlamys multistriata (G.S. Poli, 1795) - (PECTINIDAE)
- tincta, Philine tincta A.E. Verrill, 1882 - (PHILINIDAE)
- tincta, Turbonilla tincta G.B. III Sowerby, 1900 - (PYRAMIDELLIDAE)
- tincta, Syrnola tincta G.F. Angas, 1871 - (PYRAMIDELLIDAE)
- tincta, Pseudodaphnella tincta (L.A. Reeve, 1846) - (RAPHITOMIDAE)
- tincta, Gymnobela tincta A.E. Verrill, 1885 - syn of: Gymnobela emertoni (A.E. Verrill & S. Smith in A.E. Verrill, 1884) - (RAPHITOMIDAE)
- tincta, Vitrinella tincta C.B. Adams, 1850 - (TORNIDAE)
- tincta, Pleurotoma tincta L.A. Reeve, 1846 - syn of: Pseudodaphnella tincta (L.A. Reeve, 1846) - (TURRIDAE)
- tincta aureotincta, Clathurella tincta aureotincta R.P.J. Hervier, 1897 - syn of: Pseudodaphnella tincta aureotincta (R.P.J. Hervier, 1897) - (CLATHURELLIDAE)
- tincta aureotincta, Pseudodaphnella tincta aureotincta (R.P.J. Hervier, 1897) - (RAPHITOMIDAE)
- tincta lemniscata, Pseudodaphnella tincta lemniscata (G. Nevill & H. Nevill, 1869) - syn of: Pseudodaphnella lemniscata (G. Nevill & H. Nevill, 1869) - (RAPHITOMIDAE)
- tincta nigrocingulata, Pseudodaphnella tincta nigrocingulata R.P.J. Hervier, 1897 - (RAPHITOMIDAE)
- tincta obliterata, Achatina tincta obliterata P. Dautzenberg, 1891 - (ACHATINIDAE)
- tincta pallida, Pseudodaphnella tincta pallida J.L. Bouge & P. Dautzenberg, 1914 - (RAPHITOMIDAE)
- tinctilabris, Megalophaedusa martensii tinctilabris H.A. Pilsbry, 1902 - (CLAUSILIIDAE)
- tinctilis, Margovula tinctilis C.N. Cate, 1973 - (OVULIDAE)
- Tinctora, syn of: Genus Transennella W.H. Dall, 1883 (VENERIDAE)
- tinctoria, Chama tinctoria F.R. Bernard, 1976 - (CHAMIDAE)
- tinctoria, Chromodoris tinctoria W.P.E.S. Rüppell & F.S. Leuckart, 1830 - syn of: Goniobranchus tinctorius (W.P.E.S. Rüppell & F.S. Leuckart, 1830) - (CHROMODORIDIDAE)
- tinctoria, Doris tinctoria W.P.E.S. Rüppell & F.S. Leuckart, 1828 - syn of: Goniobranchus tinctorius (W.P.E.S. Rüppell & F.S. Leuckart, 1830) - (DORIDIDAE)
- tinctorium, Epitonium tinctorium W.H. Dall, 1919 - (EPITONIIDAE)
- tinctorius, Goniobranchus tinctorius (W.P.E.S. Rüppell & F.S. Leuckart, 1830) - (CHROMODORIDIDAE)
- tinctorum, Epitonium tinctorum W.H. Dall, 1917 - syn of: Epitonium tinctorium W.H. Dall, 1919 - (EPITONIIDAE)
- tinctum, Microcardium tinctum (W.H. Dall, 1881) - (CARDIIDAE)
- tinctum, Epitonium tinctum (P.P. Carpenter, 1864) - (EPITONIIDAE)
- tinctum bormanni, Epitonium tinctum bormanni A.M. Strong, 1941 - (EPITONIIDAE)
- tinctum subcoronatum, Epitonium tinctum subcoronatum P.P. Carpenter, 1864 - (EPITONIIDAE)
- tinctura, Crenavolva tinctura (T.A. Garrard, 1963) - (OVULIDAE)
- tinctura, Simnia tinctura T.A. Garrard, 1963 - syn of: Crenavolva tinctura (T.A. Garrard, 1963) - (OVULIDAE)
- tincturata, Natica tincturata L.A. Reeve, 1855 - syn of: Natica cincta C.A. Récluz, 1850 - (NATICIDAE)
- tinctus, Gemophos tinctus (T.A. Conrad, 1846) - (BUCCINIDAE)
- tinctus, Pollia tinctus T.A. Conrad, 1846 - syn of: Gemophos tinctus (T.A. Conrad, 1846) - (BUCCINIDAE)
- tinctus, Pisania tinctus T.A. Conrad, 1846 - syn of: Gemophos tinctus (T.A. Conrad, 1846) - (BUCCINIDAE)
- tinctus, Donax tinctus A.A. Gould, 1850 - (DONACIDAE)
- tinctus, Unio tinctus H. Drouët, 1893 - syn of: Potomida littoralis (G.L.C.F.D. Cuvier, 1798) - (UNIONIDAE)
- tindalei, Ischnochiton tindalei E.A. Ashby, 1924 - (ISCHNOCHITONIDAE)
- tindalli, Amalda tindalli (J.C. Melvill, 1898) - (ANCILLARIIDAE)
- tindalli, Nassarius tindalli J.C. Melvill, 1906 - syn of: Nassarius frederici (J.C. Melvill & R. Standen, 1901) - (NASSARIIDAE)
- Tindaria, Genus Tindaria L.M.D. Bellardi, 1875 (TINDARIIDAE)
- TINDARIIDAE Verrill & Bush, 1897 - Family (BIVALVIA-PROTOBRANCHIA [Subclass]-NUCULANIDA [Order]-NUCULANOIDEA [Superfamily])
- Tindariopsis, Genus Tindariopsis A.E. Verrill & K.J. Bush, 1897 (BATHYSPINULIDAE)
- tindigei, Dolichupis tindigei D. Fehse & J. Grego, 2010 - (TRIVIIDAE)
- tineana, Cernuella tineana (Benoit, 1862) - (HYGROMIIDAE)
- tinei, Buccinum tinei C. Maravigna, 1840 † - syn of: Tritia tinei (C. Maravigna, 1840 †) - (BUCCINIDAE) (FOSSIL)
- tinei, Danilia tinei (P. Calcara, 1839) - (CHILODONTIDAE)
- tinei, Papillifera bidens tinei (C.A. Westerlund, 1878) - (CLAUSILIIDAE)
- tinei, Tritia tinei (C. Maravigna, 1840 †) - (NASSARIIDAE) (FOSSIL)
- tinei, Ancylus tinei And. Bivona-Bernardi, 1839 - syn of: Ancylus fluviatilis O.F. Müller, 1774 - (PLANORBIDAE)
- tinela, Rissoina tinela N.H. Ludbrook, 1956 † - (RISSOINIDAE) (FOSSIL)
- tinga, Spinosipella tinga L.R.L. Simone & C.M. Cunha, 2008 - (VERTICORDIIDAE)
- tingamariae, Peruinia flachi tingamariae (H.A. Pilsbry, 1922) - (CLAUSILIIDAE)
- tingitana, Chondrina tingitana W. Kobelt, 1882 - syn of: Chondrina calpica (C.A. Westerlund, 1872) - (CHONDRINIDAE)
- Tingitana, Subgenus Alabastrina (Tingitana) P.M. Pallary, 1919 (HELICIDAE)
- tingitana, Tingitana tingitana (A. Paladilhe, 1875) - (HELICIDAE)
- tingitana, Mercuria tingitana P. Glöer, H.D. Boeters & Walther, 2015 - (HYDROBIIDAE)
- tingitana, Melanopsis tingitana C.G. Vos, 2005 - (MELANOPSIDAE)
- tingitana, Tritia tingitana (P.M. Pallary, 1901 †) - (NASSARIIDAE) (FOSSIL)
- tingitana, Theodoxus tingitana (P.M. Pallary, 1936) - (NERITIDAE)
- tingitana, Tricolia tingitana S. Gofas, 1982 - (PHASIANELLIDAE)
- tingitana, Succinea tingitana P.M. Pallary, 1898 - (SUCCINEIDAE)
- tingitana, Gibbula tingitana P.M. Pallary, 1901 - (TROCHIDAE)
- tingitana articulata, Nassa tingitana articulata P.M. Pallary, 1920 † - syn of: Tritia tingitana (P.M. Pallary, 1901 †) - (NASSARIIDAE) (FOSSIL)
- tingitana bucheti, Melanopsis tingitana bucheti P.M. Pallary, 1880 - (MELANOPSIDAE)
- tingitana minor, Melanopsis tingitana minor P.M. Pallary, 1921 - (MELANOPSIDAE)
- tingitana pyramidata, Gibbula tingitana pyramidata P.M. Pallary, 1920 - syn of: Gibbula tingitana P.M. Pallary, 1901 - (TROCHIDAE)
- tingitana scalaris, Melanopsis tingitana scalaris P.M.A. Morelet, 1864 - (MELANOPSIDAE)
- tingitanum, Cerithium tingitanum P.M. Pallary, 1920 ex T.A. de M. Monterosato MS - syn of: Cerithium lividulum A. Risso, 1826 - (CERITHIIDAE)
- tingitina, Nassa tingitina P.M. Pallary, 1901 † - syn of: Tritia tingitana (P.M. Pallary, 1901 †) - (NASSARIIDAE) (FOSSIL)
- tingoi, Doto tingoi L. Moro & J.A. Ortea, 2015 - (DOTIDAE)
- tingriensis, Distichites tingriensis Wang & He, 1976 † - syn of: Trachypleuraspidites griffithi Diener, 1906 † - (DISTICHITIDAE) (FOSSIL)
- tingriensis, Glabrocingulum tingriensis Pan & S. Shen, 2008 † - (GOSSELETINIDAE) (FOSSIL)
- tingriensis, Malayites tingriensis Wang & He, 1976 † - (JUVAVITIDAE) (FOSSIL)
- Tinianella, Genus Tinianella T. Kase, 1999 (PICKWORTHIIDAE)
- tinianus, Ketyconus tinianus (C.H. Hwass in J.G. Bruguière, 1792) - (CONIDAE)
- tiniola, Granulina tiniola (W.H. Dall, 1927) - syn of: Granulina tinolia (W.H. Dall, 1927) - (MARGINELLIDAE)
- tinkari, Pseudotibetites tinkari Jeannet, 1959 † - (CERATITIDA (UNASSIGNED)) (FOSSIL)
- tinkeri, Cerithium tinkeri C.J. Maury, 1912 † - (CERITHIIDAE) (FOSSIL)
- tinkeri, Hexabranchus tinkeri J.M. Ostergaard, 1955 - syn of: Hexabranchus sanguineus (W.P.E.S. Rüppell & F.S. Leuckart, 1830) - (HEXABRANCHIDAE)
- Tinnyea, Genus Tinnyea Hantken, 1887 (PACHYCHILIDAE) (FOSSIL)
- tinnyensis, Melanopsis tinnyensis W.A. Wenz, 1919 † - (MELANOPSIDAE) (FOSSIL)
- tinogastanus, Bostryx stelzneri tinogastanus J.J. Parodíz, 1948 - (BULIMULIDAE)
- tinolia, Granulina tinolia (W.H. Dall, 1927) - (MARGINELLIDAE)
- tinopaica, Salaputium tinopaica C.R. Laws, 1939 † - (CRASSATELLIDAE) (FOSSIL)
- tinophila, Theba tinophila J.R. Bourguignat, 1860 - syn of: Theba pisana (O.F. Müller, 1774) - (HELICIDAE)
- tinosa, Nassa tinosa H.A. Pilsbry & A.A. Olsson, 1941 † - (MURICIDAE) (FOSSIL)
- Tinostoma, syn of: Genus Teinostoma H. Adams & A. Adams, 1854 (TORNIDAE)
- tinostomoides, Tharsiella tinostomoides M. Fekih & L. Gougerot, 1977 - syn of: Tomura depressa (J. Granata Grillo, 1877) - (SKENEIDAE)
- Tinotis, syn of: Genus Haliotis C. Linnaeus, 1758 (HALIOTIDAE)
- tinrhertense, Kamerunoceras tinrhertense M. Collignon, 1965 † - (ACANTHOCERATIDAE) (FOSSIL)
- tinrhertense, Nigericeras tinrhertense M. Collignon & F. Roman, 1981 † - syn of: Paravascoceras cauvini (Chudeau, 1909 †) - (ACANTHOCERATIDAE) (FOSSIL)
- tinro, Eogonatus tinro K.N. Nesis, 1972 - syn of: Gonatopsis okutanii K.N. Nesis, 1972 - (GONATIDAE)
- tintinnabularum, Dallocardia tintinnabularum (C.J. Maury, 1917 †) - (CARDIIDAE) (FOSSIL)
- Tintorium, Genus Tintorium Sohl, 1960 (TONNOIDEA (UNASSIGNED)) (FOSSIL)
- tioga, Pleuronotus tioga (J.W. Hall, 1876 †) - (EUOMPHALIDAE) (FOSSIL)
- tioga, Modiomorpha tioga J.W. Hall, 1939 † - syn of: Ptychodesma knappianum J.W. Hall & R.P. Whitfield, 1872 † - (MODIOMORPHIDAE) (FOSSIL)
- tiomanensis, Oophana tiomanensis R. Clements, 2006 - (STREPTAXIDAE)
- Tioria, syn of: Genus Cirsotrema O.A.L. Mφrch, 1852 (EPITONIIDAE)
- tiorioriensis, Serripecten tiorioriensis J. Marwick, 1928 † - (PECTINIDAE) (FOSSIL)
- Tiostrea, syn of: Genus Ostrea C. Linnaeus, 1758 (OSTREIDAE)
- Tiphobia, Genus Tiphobia E.A. Smith, 1880 (PALUDOMIDAE)
- Tiphyocerma, syn of: Genus Zebina H. Adams & A. Adams, 1854 (ZEBINIDAE)
- tippana, Pterocerella tippana (T.A. Conrad, 1858 †) - (APORRHAIDAE) (FOSSIL)
- tippana, Dreissena tippana T.A. Conrad, 1858 † - (DREISSENIDAE) (FOSSIL)
- tippana, Aphrodina tippana (T.A. Conrad, 1858 †) - (VENERIDAE) (FOSSIL)
- tippanus, Hercorhyncus tippanus (T.A. Conrad, 1860 †) - (FASCIOLARIIDAE) (FOSSIL)
- tippanus, Fusimilis tippanus T.A. Conrad, 1858 † - (TURRIDAE) (FOSSIL)
- tipperi, Clavatula tipperi Cox, 1936 † - (CLAVATULIDAE) (FOSSIL)
- tipperi, Myophorella tipperi Poulton, 1979 † - (MYOPHORELLIDAE) (FOSSIL)
- tipperi, Radulopecten tipperi Cox, 1936 † - (PECTINIDAE) (FOSSIL)
- tipperi, Discamphiceras tipperi (Frebold, 1967 †) - (PSILOCERATIDAE) (FOSSIL)
- tipperi, Terebra tipperi E.W. Vredenburg, 1921 † - (TEREBRIDAE) (FOSSIL)
- tipperi, Turritella tipperi E.W. Vredenburg, 1928 † - (TURRITELLIDAE) (FOSSIL)
- tipperi, Xylophaga tipperi H. Turner, 2002 - (XYLOPHAGAIDAE)
- Tipperoceras, Genus Tipperoceras Taylor , 1998 (ARIETITIDAE) (FOSSIL)
- tippetti, Bathytoma tippetti J.L. Vera-Peláez, 2004 - (BORSONIIDAE)
- tippetti, Fenimorea tippetti P.J. Fallon, 2016 - (DRILLIIDAE)
- tippetti, Hindsiclava tippetti E.J. Petuch, 1987 - (PSEUDOMELATOMIDAE)
- tippetti, Kermia tippetti C.K. Chang, 2001 - (RAPHITOMIDAE)
- tippetti, Pleurotomella tippetti Y.I. Kantor, M.G. Harasewych & N. Puillandre, 2016 - (RAPHITOMIDAE)
- Tipua, Genus Tipua Marwick, 1943 (ARCHAEOGASTROPODA (UNASSIGNED)) (FOSSIL)
- tiradentensis, Thaumastus tiradentensis A. Peñas, A.C. dos Santos Coelho & A. Salgado, 1996 - (MEGASPIRIDAE)
- tirangiensis, Baryspira tirangiensis J. Marwick, 1926 † - (ANCILLARIIDAE) (FOSSIL)
- tirangiensis, Zeacumantus tirangiensis (J. Marwick, 1926 †) - (BATILLARIIDAE) (FOSSIL)
- tirangiensis, Pteromyrtea tirangiensis (J. Marwick, 1926 †) - (LUCINIDAE) (FOSSIL)
- tiranoi, Iberellus tiranoi G. Servain, 1880 - syn of: Iberellus companyonii (E.A. Rossmässler, 1839) - (HELICIDAE)
- tirantensis, Anadara tirantensis F. Hodson & al., 1927 † - (ARCIDAE) (FOSSIL)
- tiranti, Paludina tiranti L.J. Morlet, 1885 - (VIVIPARIDAE)
- tirardi, Rhizoconus tirardi D. Röckel & R.G. Moolenbeek, 1996 - (CONIDAE)
- tirardi, Conchatalos tirardi (R. Houart, 1991) - (MURICIDAE)
- Tiria, syn of: Genus Clavagella Blainville [ex Lamarck], 1817 (CLAVAGELLIDAE) (FOSSIL)
- tiriolensis, Ambigua fuscolabiata tiriolensis (G.B. Adami, 1873) - (HELICIDAE)
- Tirnovella, Genus Tirnovella Nikolov , 1966 (NEOCOMITIDAE) (FOSSIL)
- tiro, Reticuloceras tiro W.J. Gordon, 1969 † - (RETICULOCERATIDAE) (FOSSIL)
- tirolensiformis, Lithancylus tirolensiformis Mikhailova & Baraboshkin, 2001 † - (ANCYLOCERATIDAE) (FOSSIL)
- tirolensis, Lithancylus tirolensis T.L. Casey, 1961 † - (ANCYLOCERATIDAE) (FOSSIL)
- tirolensis, Macroscaphites tirolensis Uhlig, 1888 † - (MACROSCAPHITIDAE) (FOSSIL)
- tirolensis, Palaeoneilo tirolensis Woehrmann, 1889 † - (MALLETIIDAE) (FOSSIL)
- tirolensis, Lithophaga tirolensis L. von G. Tausch, 1890 - syn of: Lithophaga corrugata (R.A. Philippi, 1846) - (MYTILIDAE)
- tirolensis, Vertigo tirolensis P.V. Gredler, 1869 - syn of: Isthmia modesta arctica C. de Wallenberg, 1858 - (VERTIGINIDAE)
- tirolica, Modicella tirolica C.A. Westerlund, 1897 - syn of: Chondrina lusitanica (L. Pfeiffer, 1848) - (CHONDRINIDAE)
- tirolicum, Scythentolium tirolicum (Wittenburg, 1908 †) - (ENTOLIIDAE) (FOSSIL)
- Tirolidia, Genus Tirolidia Bittner, 1895 (LIMIDAE) (FOSSIL)
- Tirolites, Genus Tirolites Mojsisovics , 1879 (TIROLITIDAE) (FOSSIL)
- TIROLITIDAE Mojsisovics, 1882 - Family (CEPHALOPODA-AMMONOIDEA [Subclass]-CERATITIDA [Order]-DINARITOIDEA [Superfamily]) (FOSSIL)
- Tirolonautilus, Genus Tirolonautilus von Mojsisovics, 1902 (TAINOCERATIDAE) (FOSSIL)
- Tirolthilda, Genus Tirolthilda Bandel, 1995 (MATHILDIDAE) (FOSSIL)
- Tironucula, Genus Tironucula Morris & Fortey, 1976 (PRAENUCULIDAE) (FOSSIL)
- TIRONUCULIDAE Babin in Babin & al., 1982 - Family (BIVALVIA-PROTOBRANCHIA [Subclass]-AFGHANODESMATIDA [Order]-TIRONUCULOIDEA [Superfamily]) (FOSSIL)
- tirusum, Orthonema tirusum Batten, 1985 † - (ORTHONEMATIDAE) (FOSSIL)
- tishae, Doriopsilla tishae Á. Valdés & J.C. Hamann, 2008 - (DENDRODORIDIDAE)
- tisii, Embrikena tisii (T.C. Lan, 1978) - (CONIDAE)
- tisiphona, Oliva tisiphona P.L. Duclos, 1844 - (OLIVIDAE)
- tisiphona hepatica, Oliva tisiphona hepatica F.P. Marrat, 1871 - (OLIVIDAE)
- tisiphona mercatoria, Oliva tisiphona mercatoria F.P. Marrat, 1871 - (OLIVIDAE)
- tisiphona oblonga, Oliva tisiphona oblonga F.P. Marrat, 1867 - (OLIVIDAE)
- tisiphona schepmani, Oliva tisiphona schepmani N.E. Weisbord, 1962 - (OLIVIDAE)
- tissoti, Semiricinula tissoti (S.A.A. Petit De La Saussaye, 1852) - (MURICIDAE)
- tissoti, Thaisella tissoti S.A.A. Petit De La Saussaye, 1852 - syn of: Semiricinula tissoti (S.A.A. Petit De La Saussaye, 1852) - (MURICIDAE)
- tissoti, Anodonta tissoti G. Servain, 1881 - syn of: Anodonta cygnea (C. Linnaeus, 1758) - (UNIONIDAE)
- Tissotia, Genus Tissotia Douvillι, 1890 (TISSOTIIDAE) (FOSSIL)
- tissotiana, Cymbiola tissotiana J.C.H. Crosse, 1867 - syn of: Cymbiola flavicans (J.F. Gmelin, 1791) - (VOLUTIDAE)
- tissotii, Pecten tissotii A.C. Bernardi, 1858 - (PECTINIDAE)
- TISSOTIIDAE Hyatt, 1900 - Family (CEPHALOPODA-AMMONOIDEA [Subclass]-AMMONITIDA [Order]-ACANTHOCERATOIDEA [Superfamily]) (FOSSIL)
- Tissotioides, Genus Tissotioides Reyment, 1958 (TISSOTIIDAE) (FOSSIL)
- tistutensis, Rossmaessleria tistutensis (J. Rutllant) - (HELICIDAE)
- tita, Semele tita W.H. Dall, P. Bartsch & H.A. Rehder, 1938 - syn of: Semele australis (G.B. I Sowerby, 1833) - (SEMELIDAE)
- titahica, Curveulima titahica (H.H. Suter, 1908) - (EULIMIDAE)
- titan, Titanites titan Buckman † - (AMMONOIDEA (UNASSIGNED)) (FOSSIL)
- titan, Busycon titan E.J. Petuch, 1994 † - (BUSYCONIDAE) (FOSSIL)
- titan, Phenacomargarites titan B.A. Marshall, 2016 † - (CALLIOSTOMATIDAE) (FOSSIL)
- titan, Goliathiceras titan Arkell, 1943 † - (CARDIOCERATIDAE) (FOSSIL)
- titan, Lyncina leviathan titan F.A. Schilder & M. Schilder, 1962 - (CYPRAEIDAE)
- titan, Mitra titan W.M. Gabb, 1873 † - (MITRIDAE) (FOSSIL)
- titan, Weyla titan (Moricke, 1894 †) - (NEITHEIDAE) (FOSSIL)
- titan, Crassostrea titan (T.A. Conrad, 1853 †) - (OSTREIDAE) (FOSSIL)
- titan, Telescopium titan Martin, 1889 † - (POTAMIDIDAE) (FOSSIL)
- titan, Euglandina titan F.G. Thompson, 1987 - (SPIRAXIDAE)
- titan, Dosinia titan C.J. Maury, 1925 - syn of: Dosinia ponderosa Gray, 1838 - (VENERIDAE)
- titanes, Homoctenowakia bohemica titanes Alberti, 1993 † - (PARANOWAKIIDAE) (FOSSIL)
- titania, Leiostraca titania (A. Adams, 1861) - (EULIMIDAE)
- titania, Eulima titania A. Adams, 1864 - syn of: Leiostraca titania (A. Adams, 1861) - (EULIMIDAE)
- titania, Clydonacme titania F.G. Thompson, 2006 - (HUMBOLDTIANIDAE)
- titania, Phrixgnathus titania (F.W. Hutton, 1883) - (PUNCTIDAE)
- titania, Laoma titania F.W. Hutton, 1883 - syn of: Phrixgnathus titania (F.W. Hutton, 1883) - (PUNCTIDAE)
- titania, Astraea titania P.F. Röding, 1798 - syn of: Lithopoma phoebium (P.F. Röding, 1798) - (TURBINIDAE)
- titanica, Emoda pulcherrima titanica (F. Poey, 1851) - (HELICINIDAE)
- titanica, Ringicula titanica M.M. Schepman, 1913 - (RINGICULIDAE)
- titaniforme, Montyoceras titaniforme Flower, 1941 † - (HEBETOCERATIDAE) (FOSSIL)
- Titanites, Genus Titanites Buckman, 1921 (AMMONOIDEA (UNASSIGNED)) (FOSSIL)
- titanium, Calliostoma titanium J.H. McLean, 1984 - (CALLIOSTOMATIDAE)
- Titanocardium, Subgenus Hedecardium (Titanocardium) Laws, 1933 (CARDIIDAE) (FOSSIL)
- Titanoceras, Genus Titanoceras Hyatt, 1884 (GRYPOCERATIDAE) (FOSSIL)
- titanodolema, Sphincterochila titanodolema (J.R. Bourguignat, 1883) - (SPHINCTEROCHILIDAE)
- Titanoplina, Genus Titanoplina Stinchcomb & Angeli, 2002 (PROPLINIDAE) (FOSSIL)
- Titanopoma, syn of: Subgenus Cochlostoma (Auritus) C.A. Westerlund, 1883 (COCHLOSTOMATIDAE)
- Titanosarcolites, Genus Titanosarcolites Trechmann, 1924 (ANTILLOCAPRINIDAE) (FOSSIL)
- Titanostrombus, syn of: Genus Lobatus W.J. Swainson, 1837 (STROMBIDAE)
- Titanostrombus, syn of: Genus Lobatus W.J. Swainson, 1837 (STROMBIDAE)
- titanotus, Pteroctopus titanotus F.H. Troschel, 1857 - syn of: Pteroctopus tetracirrhus (S. Delle Chiaje, 1830) - (OCTOPODIDAE)
- Titaonpecten, syn of: Genus Titonopecten Romanov, 1985 (PECTINIDAE) (FOSSIL)
- titea, Oliva titea P.L. Duclos, 1844 - syn of: Miniaceoliva miniacea (P.F. Röding, 1798) - (OLIVIDAE)
- titei, Nuculana titei (Moore) † - (NUCULANIDAE) (FOSSIL)
- titestiensis, Coptostylus albidus titestiensis Popescu-voitesti, 1910 † - (THIARIDAE) (FOSSIL)
- tithonia, Tellina tithonia A.A. Gould, 1850 - syn of: Tellina staurella J.B.P.A. Lamarck, 1818 - (TELLINIDAE)
- tithonis, Linga tithonis W.H. Dall, 1903 † - (LUCINIDAE) (FOSSIL)
- Tithonoceras, Genus Tithonoceras Retowski, 1894 (PARACENOCERATIDAE) (FOSSIL)
- Tithopeltoceras, Genus Tithopeltoceras Arkell, 1953 (AMMONOIDEA (UNASSIGNED)) (FOSSIL)
- Tithyonia, syn of: Genus Carinaria J.B.P.A. Lamarck, 1801 (CARINARIIDAE)
- titicacence, Sphaerium titicacence (H.A. Pilsbry, 1924) - (SPHAERIIDAE)
- titicacense, Sphaerium titicacense H.A. Pilsbry, 1924 - syn of: Sphaerium titicacence (H.A. Pilsbry, 1924) - (SPHAERIIDAE)
- titii, Fusus titii A. Stossich, 1866 - syn of: Ocinebrina aciculata (J.B.P.A. Lamarck, 1822) - (FASCIOLARIIDAE)
- titii, Ocinebrina titii A. Stossich, 1865 - syn of: Ocinebrina aciculata (J.B.P.A. Lamarck, 1822) - (MURICIDAE)
- titii minor, Ocinebrina titii minor T.A. de M. Monterosato in F. Settepassi, 1977 - syn of: Ocinebrina aciculata (J.B.P.A. Lamarck, 1822) - (MURICIDAE)
- titikaveka, Sinployea titikaveka F.J. Brook, 2010 - (CHAROPIDAE)
- titirangiensis, Purpurocardia titirangiensis (J. Marwick, 1943 †) - (CARDITIDAE) (FOSSIL)
- titirangiensis, Chaureopa titirangiensis (H.H. Suter, 1896) - (CHAROPIDAE)
- titirangiensis, Charopa titirangiensis H.H. Suter, 1896 - syn of: Chaureopa titirangiensis (H.H. Suter, 1896) - (CHAROPIDAE)
- titirangiensis, Liracraea titirangiensis J. Marwick, 1928 † - (MANGELIIDAE) (FOSSIL)
- titirangiensis, Chlamys titirangiensis J. Marwick, 1928 - syn of: Zygochlamys delicatula (F.W. Hutton, 1873) - (PECTINIDAE)
- Titiscania, Genus Titiscania L.S.R. Bergh, 1890 (TITISCANIIDAE)
- TITISCANIIDAE Bergh, 1890 - Family (GASTROPODA-NERITIMORPHA [Subclass]-CYCLONERITIMORPHA [Order]-NERITOPSOIDEA [Superfamily])
- titizimanum, Styloptygma titizimanum (S. Nomura, 1939 †) - (PYRAMIDELLIDAE) (FOSSIL)
- titon, Pseudomelania titon Cox & Arkell † - (PSEUDOMELANIIDAE) (FOSSIL)
- Titonopecten, Genus Titonopecten Romanov, 1985 (PECTINIDAE) (FOSSIL)
- Titonpecten, syn of: Genus Titonopecten Romanov, 1985 (PECTINIDAE) (FOSSIL)
- tittabweensis, Crassispira tittabweensis E.W. Vredenburg, 1921 † - (PSEUDOMELATOMIDAE) (FOSSIL)
- tittabweensis, Hastula tittabweensis E.W. Vredenburg, 1921 † - (TEREBRIDAE) (FOSSIL)
- tittarium, Calliostoma tittarium W.H. Dall, 1927 - (CALLIOSTOMATIDAE)
- Titthodomus, Genus Titthodomus Pfeffer, 1929 (HELICIDAE)
- titthum, Serripes titthum L. Krishtofovich, 1969 † - syn of: Serripes groenlandicus (N.P. Mohr, 1786) - (CARDIIDAE) (FOSSIL)
- titticacensis, Planorbis titticacensis S. Clessin, 1884 - syn of: Biomphalaria andecola (A.V.M.D. D'Orbigny, 1835) - (PLANORBIDAE)
- titubans, Vitreolina titubans S.S. Berry, 1956 - (EULIMIDAE)
- titusi, Fluviopupa titusi M. Haase, Fontaine & O. Gargominy, 2010 - (HYDROBIIDAE)
- tityra, Clathrodrillia tityra W.P. Woodring, 1928 † - (DRILLIIDAE) (FOSSIL)
- tityrus, Endoceras tityrus Billings, 1865 † - (ENDOCERATIDAE) (FOSSIL)
- tityrus, Siphonochelus tityrus (F.M. Bayer, 1971) - (MURICIDAE)
- tityrus, Typhisala tityrus (F.M. Bayer, 1971) - syn of: Siphonochelus tityrus (F.M. Bayer, 1971) - (MURICIDAE)
- tiunovae, Dahurinaia tiunovae V.V. Bogatov & F. Zatrawkin, 1988 - syn of: Margaritifera dahurica (A.T. von Middendorff, 1850) - (MARGARITIFERIDAE)
- tiurensis, Duplicaria tiurensis (M.M. Schepman, 1913) - (TEREBRIDAE)
- Tivela, Genus Tivela J.H.F. Link, 1807 (VENERIDAE)
- Tivelina, Genus Tivelina Cossmann, 1886 (VENERIDAE) (FOSSIL)
- Tivellina, syn of: Genus Tivelina Cossmann, 1886 (VENERIDAE) (FOSSIL)
- Tiverites, Genus Tiverites Berger, 1989 (TENTACULITA (UNASSIGNED)) (FOSSIL)
- tivertonensis, Aphanaia tivertonensis C.O. Waterhouse, 1979 † - (ATOMODESMATIDAE) (FOSSIL)
- tixierae, Fissurella radiosa tixierae B. Métivier, 1969 - (FISSURELLIDAE)
- tixierae, Pseudomiltha tixierae E. Klein, 1967 - syn of: Myrteopsis lens (A.E. Verrill & S. Smith, 1880) - (LUCINIDAE)
- tixierae, Myrteopsis tixierae E. Klein, 1967 - syn of: Myrteopsis lens (A.E. Verrill & S. Smith, 1880) - (LUCINIDAE)
- Tiza, Genus Tiza Gregorio, 1890 (MYIDA (UNASSIGNED)) (FOSSIL)
- tizianoi, Megalacron tizianoi A. Delsaerdt, 2016 - (CAMAENIDAE)
- Tjaernoeia, Genus Tjaernoeia A. Warιn & P. Bouchet, 1988 (TJAERNOEIIDAE)
- TJAERNOEIIDAE Warιn & Bouchet, 1991 - Family (GASTROPODA-HETEROBRANCHIA [Subclass]-HETEROSTROPHA [Infraclass])
- TJAERNOIIDAE - syn of Family: TJAERNOEIIDAE
- tjambensis, Paraphaedusa usitata tjambensis P. Ehrmann, 1949 - (CLAUSILIIDAE)
- tjariangensis, Tarebia tjariangensis Martin, 1905 † - (THIARIDAE) (FOSSIL)
- tjaringinensis, Arca tjaringinensis K. Martin, 1883 † - syn of: Anadara biformis K. Martin, 1883 † - (ARCIDAE) (FOSSIL)
- tjaringinensis, Conus tjaringinensis Martin, 1895 † - (CONIDAE) (FOSSIL)
- tjaringinensis, Clavilithes tjaringinensis Martin, 1895 † - (FASCIOLARIIDAE) (FOSSIL)
- tjaringinensis, Chlamys tjaringinensis Martin, 1909 † - (PECTINIDAE) (FOSSIL)
- tjemoroensis, Hindsia tjemoroensis K. Martin, 1899 - syn of: Nassaria acuminata (L.A. Reeve, 1844) - (NASSARIIDAE)
- tjemoroensis, Brachytoma tjemoroensis Martin, 1903 † - (PSEUDOMELATOMIDAE) (FOSSIL)
- tjemoroensis, Thiara tjemoroensis Martin, 1905 † - (THIARIDAE) (FOSSIL)
- tjendanae, Asperitas trochus tjendanae B. Rensch, 1932 - (DYAKIIDAE)
- tjibaliungense, Trigonostoma tjibaliungense (K. Martin, 1895 †) - (CANCELLARIIDAE) (FOSSIL)
- tjibaliungensis, Siphonalia tjibaliungensis (K. Martin, 1895 †) - (BUCCINIDAE) (FOSSIL)
- tjibaliungensis, Elaeocyma tjibaliungensis Y. Otuka, 1937 - (DRILLIIDAE)
- tjibaliungensis turuhikoi, Elaeocyma tjibaliungensis turuhikoi Y. Otuka, 1937 - (DRILLIIDAE)
- tjibodasiana, Lucina tjibodasiana Martin, 1922 † - (LUCINIDAE) (FOSSIL)
- tjicumpaiensis, Turritella bantamensis tjicumpaiensis Martin, 1905 - (TURRITELLIDAE)
- tjidamarensis, Arca tjidamarensis K. Martin, 1879 † - (ARCIDAE) (FOSSIL)
- tjidamarensis, Conus tjidamarensis Martin, 1879 † - (CONIDAE) (FOSSIL)
- tjidamarensis, Clavilithes tjidamarensis (K. Martin, 1879 †) - (FASCIOLARIIDAE) (FOSSIL)
- tjidamarensis, Neritina tjidamarensis Martin, 1879 † - (NERITIDAE) (FOSSIL)
- tjidamarensis, Terebra tjidamarensis K. Martin, 1879 - (TEREBRIDAE)
- tjidamrensis, Oliva tjidamrensis Martin, 1879 † - (OLIVIDAE) (FOSSIL)
- tjiguhanensis, Bicorbula tjiguhanensis Martin, 1922 † - (CORBULIDAE) (FOSSIL)
- tjilanangensis, Scapharca tjilanangensis K. Martin, 1910 † - (ARCIDAE) (FOSSIL)
- tjilonganense, Batillaria tjilonganense K. Martin, 1899 † - (BATILLARIIDAE) (FOSSIL)
- tjilonganensis, Clypeomorus tjilonganensis (K. Martin, 1899 †) - (CERITHIIDAE) (FOSSIL)
- tjilonganensis, Conus tjilonganensis Martin, 1906 † - (CONIDAE) (FOSSIL)
- tjilonganensis, Rimella tjilonganensis (K. Martin, 1899 †) - (RIMELLIDAE) (FOSSIL)
- tjilonganensis, Strombus tjilonganensis K. Martin, 1899 † - (STROMBIDAE) (FOSSIL)
- tjilonganensis, Tectus tjilonganensis Martin, 1905 † - (TEGULIDAE) (FOSSIL)
- tjilonganensis, Cymbiola tjilonganensis (K. Martin, 1906 †) - (VOLUTIDAE) (FOSSIL)
- Tjururpites, Genus Tjururpites Shevyrev, 1968 (CERATITIDA (UNASSIGNED)) (FOSSIL)
- tjuschevkensis, Cyclocardia tjuschevkensis (Ilyina, 1963 †) - (CARDITIDAE) (FOSSIL)
- tjuschevkensis, Macrocallista tjuschevkensis Khomenko, 1969 † - (VENERIDAE) (FOSSIL)
- tkhachense, Parasageceras tkhachense Shevyrev, 1968 † - (SAGECERATIDAE) (FOSSIL)
- tkhachensis, Nicomedites tkhachensis Shevyrev, 1968 † - (BEYRICHITIDAE) (FOSSIL)
- tkinoshitai, Oxyloma tkinoshitai J.T. Kuroda & S. Emura, 1957 - (SUCCINEIDAE)
- Tlahualiloceras, Genus Tlahualiloceras Kellum & Mintz, 1962 (ACANTHOCERATIDAE) (FOSSIL)
- tlahualiloensis, Tlahualiloceras tlahualiloensis Kellum & Mintz, 1962 † - (ACANTHOCERATIDAE) (FOSSIL)
- tlapamensis, Neoxyloma tlapamensis (H.A. Pilsbry, 1899) - (SUCCINEIDAE)
- tlapamensis cuitseana, Neoxyloma tlapamensis cuitseana (H.A. Pilsbry, 1899) - (SUCCINEIDAE)
- tlaxiacense, Parastrenoceras tlaxiacense Ochoterena, 1963 † - (SPIROCERATIDAE) (FOSSIL)
- Tmaegoceras, Genus Tmaegoceras Pompeckj, 1901 (ARIETITIDAE) (FOSSIL)
- Tmaegophioceras, Genus Tmaegophioceras Geyer, 1886 (ARIETITIDAE) (FOSSIL)
- tmeta, Typhlomangelia tmeta R.B. Watson, 1881 - syn of: Spirotropis tmeta (R.B. Watson, 1881) - (BORSONIIDAE)
- tmeta, Spirotropis tmeta (R.B. Watson, 1881) - (DRILLIIDAE)
- Tmetoceras, Genus Tmetoceras Buckman, 1892 (HILDOCERATIDAE) (FOSSIL)
- tmetolobus, Procerites tmetolobus Buckman † - (PERISPHINCTIDAE) (FOSSIL)
- Tmetonema, Genus Tmetonema Longstaff, 1912 (ANOZYGIDAE) (FOSSIL)
- tmetus, Graphiconus ochroleucus tmetus (J.R. le B. Tomlin, 1937) - (CONIDAE)
- tmetus, Zeatrophon tmetus H.J. Finlay, 1930 - syn of: Xymene huttonii (R. Murdoch, 1900) - (MURICIDAE)
- toaensis, Sectipecten toaensis J. Marwick, 1928 † - (PECTINIDAE) (FOSSIL)
- toalarum, Hemiplecta toalarum (P.B. Sarasin & K.F. Sarasin, 1905) - (ARIOPHANTIDAE)
- toaltoniana, Omogymna liodes toaltoniana J. Gardner, 1937 † - (OLIVIDAE) (FOSSIL)
- toarcense, Cenoceras toarcense (A.V.M.D. D'Orbigny, 1850 †) - (CENOCERATIDAE) (FOSSIL)
- toarciensis, Colpomphalus toarciensis J. Gründel, 2001 † - (DISCOHELICIDAE) (FOSSIL)
- Toarctocera, Genus Toarctocera Grόndel & al., 2009 (APORRHAIDAE) (FOSSIL)
- tobae, Corbicula tobae E.C. Von Martens, 1900 - (CYRENIDAE)
- tobagoensis, Calliclava tobagoensis P.J. Fallon, 2016 - (DRILLIIDAE)
- tobagoensis, Lucapina suffusa tobagoensis I. Pérez Farfante - (FISSURELLIDAE)
- tobagoensis, Granulina tobagoensis T. McCleery, 2010 - (MARGINELLIDAE)
- tobagoensis, Terebra tobagoensis G.W. Nowell-Usticke, 1969 - syn of: Impages maryleeae (R.D. Burch, 1965) - (TEREBRIDAE)
- tobagoensis, Hastula tobagoensis G.W. Nowell-Usticke, 1969 - syn of: Impages maryleeae (R.D. Burch, 1965) - (TEREBRIDAE)
- tobagoensis, Voluta tobagoensis A.H. Verrill, 1953 - syn of: Voluta musica C. Linnaeus, 1758 - (VOLUTIDAE)
- tobagoensis damula, Voluta tobagoensis damula W.H. Dall, 1907 - syn of: Voluta musica C. Linnaeus, 1758 - (VOLUTIDAE)
- tobagoensis guinaica, Voluta tobagoensis guinaica J.B.P.A. Lamarck, 1811 - syn of: Voluta musica C. Linnaeus, 1758 - (VOLUTIDAE)
- tobai, Euhadra decorata tobai Y. Hirase - (BRADYBAENIDAE)
- tobai, Myophoria tobai I. Hayasaka, 1925 † - syn of: Lyroschizodus tobai (I. Hayasaka, 1925 †) - (MYOPHORIIDAE) (FOSSIL)
- tobai, Lyroschizodus tobai (I. Hayasaka, 1925 †) - (SCHIZODIDAE) (FOSSIL)
- tobai, Schizodus tobai I. Hayasaka, 1925 † - syn of: Lyroschizodus tobai (I. Hayasaka, 1925 †) - (SCHIZODIDAE) (FOSSIL)
- tobar, Orthosurcula longipersa tobar Gardner, 1935 † - (COCHLESPIRIDAE) (FOSSIL)
- Tobarum, syn of: Subgenus Nemocardium (Microcardium) A.M. Keen, 1937 (CARDIIDAE)
- tobeyoides, Anatoma tobeyoides D.L. Geiger & P. Jansen, 2004 - (ANATOMIDAE)
- tobisimae, Euhadra grata tobisimae J.T. Kuroda, 1931 - (BRADYBAENIDAE)
- tobisimensis, Pyrgiscus tobisimensis S. Nomura, 1938 - syn of: Mormula philippiana (R.W. Dunker, 1860) - (PYRAMIDELLIDAE)
- tobisimensis daibutu, Pyrgiscus tobisimensis daibutu S. Nomura, 1938 - syn of: Mormula philippiana (R.W. Dunker, 1860) - (PYRAMIDELLIDAE)
- tobleri, Asthenotoma tobleri (K. Martin, 1884 †) - (BORSONIIDAE) (FOSSIL)
- tobolicus, Pararasenia tobolicus (Khudyaev, 1929 †) - (AULACOSTEPHANIDAE) (FOSSIL)
- tobonnoensis, Maitaia tobonnoensis Biakov, 2013 † - (ATOMODESMATIDAE) (FOSSIL)
- tobyi, Volvarina tobyi J. Espinosa, J.A. Ortea & Y.L. Diez, 2015 - (MARGINELLIDAE)
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