Ostrea tayloriana (FOSSIL) W.M. Gabb, 1866 †
Cubitostrea tecticosta (FOSSIL) (W.M. Gabb, 1860 †)
Ostrea tegalensis (FOSSIL) C.H. Oostingh, 1935 †
Ostrea tegulanea E. Forbes, 1846
Crassostrea tenera (FOSSIL) (J. Sowerby 1819) †
Lopha teranosawensis (FOSSIL) Nakazawa & Newell, 1968 †
Ostrea thalassoklusta (FOSSIL) C.J. Maury, 1912 †
Odontogryphaea thirsae (FOSSIL) (W.M. Gabb, 1862 †)
Liostrea tibetica (FOSSIL) Yin & McRoberts, 2006 †
Crassostrea tigiliana (FOSSIL) Slodkewitsch, 1938 †
Crassostrea titan (FOSSIL) (T.A. Conrad, 1853 †)
Crassostrea transitoria (FOSSIL) (L.H. Hupé, 1854 †)
Dendostrea trapezina (J.B.P.A. Lamarck, 1819)
Lopha travisama (FOSSIL) L.W. Stephenson †
Nicaisolopha tridacnaeformis (Cox, 1927)
Gigantostrea trigonalis (FOSSIL) (T.A. Conrad, 1854 †)
Ostrea tubulifera W.H. Dall, 1914
Crassostrea tulipa (J.B.P.A. Lamarck, 1819)
Ostrea turkestanensis (FOSSIL) Romanovski, 1880 †
Crassostrea uandiensis (FOSSIL) (Lautenschläger, 1964 †)
Ostrea uncinta (FOSSIL) J.B.P.A. Lamarck, 1806 †
Alectryonella undata (FOSSIL) (Lamarck) †
Ostrea undosa (FOSSIL) Phillips, 1829 †
Ostrea ungulata (FOSSIL) P. Nyst, 1843 †
Crassostrea vaquerosensis (FOSSIL) Loel & Corey, 1932 †
Ostrea vaughani (FOSSIL) W.H. Dall, 1915 †
Lopha veatchii (FOSSIL) W.M. Gabb, 1866 †
Crassostrea vectensis (FOSSIL) (Morris, 1856 †)
Ostrea ventilabrum (FOSSIL) G.A. Goldfuss, 1826 †
Ostrea venturana (FOSSIL) (Loel & Corey 1932) †
Ostrea venusta (FOSSIL) A. Braun, 1841 †
Ostrea vesicularis (FOSSIL) J.B.P.A. Lamarck, 1806 †
Dendostrea vespertina (FOSSIL) T.A. Conrad, 1854 †
Ostrea vestita (FOSSIL) A. Fuchs, 1883 †
Lopha vicksburgensis (FOSSIL) T.A. Conrad, 1848 †