Mactra substriatella (FOSSIL) Orbigny, 1852 †
Spisula subtruncata (da Costa, 1778)
Spisula subtruncata triangula (FOSSIL) (Renieri, 1804 †)
Anatina suessi (FOSSIL) Oppel, 1858 †
Spisula summa (FOSSIL) A.A. Olsson, 1928 †
Mactromeris tejonensis (FOSSIL) A. Packard, 1916 †
Zenatia tepikiensis (FOSSIL) A.G. Beu, 1966 †
Mactra thaanumi W.H. Dall, P. Bartsch& H.A. Rehder, 1938
Tumbeziconcha thracioides (A. Adams & L.A. Reeve,1850)
Spisula tigilensis (FOSSIL) (L. Krishtofovich,1947 †)
Oxyperas transversa (L.A. Reeve, 1854)
Lutraria trapezoidalis (FOSSIL) Powell & J.A. Bartrum,1929 †
Mactromeris triangulata (FOSSIL) L.S. Zhidkova, 1994 †
Spisula trigonella (J.B.P.A. Lamarck, 1818)
Mactra tripartita E. Forbes, 1846
Cyclomactra tristis (L.A. Reeve, 1854)
Mactra truncata Montague, 1808
Petromactra truncata (FOSSIL) (W.M. Gabb, 1864 †)
Mactrinula tryphera J.C. Melvill, 1899
Mactrellona tumbezia (FOSSIL) A.A. Olsson, 1921 †
Mactra tumida (FOSSIL) Bohm, 1926 †
Mactra turgida J.F. Gmelin, 1791
Lutraria turneri F.P. Jousseaume, 1891
Raeta undulata (A.A. Gould, 1851)
Leptomactra valhosierr (FOSSIL) (Gardner, 1947 †)
Mactrotoma velata (R.A. Philippi, 1849)
Lutraria vellai (FOSSIL) (A.G. Beu, 1966 †)
Spisula veneriformis (FOSSIL) Clark 1925 †
Diaphoromactra versicolor (R. Tate, 1887)
Zenatina victoriae (G.B. Pritchard, 1903)
Mactra violacea J.F. Gmelin, 1791
Mactra vitaliana (FOSSIL) A.V.M.D. D'Orbigny,1844 †
Mactra vitaliana balcica (FOSSIL) Marcarovici, 1935 †
Zenatia waipipiana (FOSSIL) A.G. Beu, 1966 †
Mactra westralis K.L. Lamprell& T. Whitehead, 1990