Notocallista tersa (FOSSIL) J. Marwick, 1938 †
Calpitaria texacola (FOSSIL) (G.F. Harris, 1895 †)
Mercenaria texana (W.H. Dall, 1902)
Rhabdopitaria texangelina (FOSSIL) H.B. Stenzel & al.,1957 †
Agriopoma texasiana (W.H. Dall, 1892)
Calpitaria texibrazus (FOSSIL) H.B. Stenzel & al.,1957 †
Katherinella texitrina (FOSSIL) H.B. Stenzel & al.,1957 †
Katelysia texta (FOSSIL) (J.B.P.A. Lamarck,1806 †)
Kyrina texta (G.P. Deshayes, 1853)
Paphia textile (J.F. Gmelin, 1791)
Leukoma thaca (Molina, 1782)
Venus thomassini E. Fischer-Piette& D. Vukadinovic, 1977
Eumarcia thomsoni (FOSSIL) J. Marwick, 1927 †
Pitar thornleyae K.L. Lamprell & J.M. Healy,1997
Macrocallista tia (FOSSIL) Kellum, 1926 †
Lioconcha tigrina (J.B.P.A. Lamarck, 1818)
Meretrix tigris K.Y. Lai & Nien, 2008
Aphrodina tippana (FOSSIL) (T.A. Conrad, 1858 †)
Macrocallista tjuschevkensis (FOSSIL) Khomenko, 1969 †
Agriopoma tomeanum (W.H. Dall, 1902)
Globivenus toreuma (A.A. Gould, 1850)
Calpitaria tornadonis (FOSSIL) G.F. Harris, 1919 †
Tawera torresiana (E.A. Smith, 1884)
Lamelliconcha tortuosa (W.J. Broderip, 1835)
Chionopsis traftoni (FOSSIL) H.A. Pilsbry& A.A. Olsson, 1941 †
Macrocallista traftoni A.A. Olsson, 1942
Dosinia trailli A. Adams, 1856
Dosinia tranquebarica E. Fischer-Piette, 1977
Nitidavenus tranquilla (FOSSIL) (G.P. Deshayes, 1857 †)
Tivela transversa (G.B. III Sowerby, 1897)
Pitar trevori K.L. Lamprell& T. Whitehead, 1990
Grateloupia triangularis (FOSSIL) (B. de Basterot, 1825 †)
Tapes tricuspis (FOSSIL) (K.E.I. von Eichwald,1829 †)
Pelecyora trigona (L.A. Reeve, 1850)
Rohea trigonalis (FOSSIL) (J. Marwick, 1927 †)