Anatina arcuata E. Forbes, 1846
Mactra artensis R.P. Montrouzier, 1859
Mactra artopta (FOSSIL) Woods, 1850 †
Spisula asperaeformis S. Nomura & N. Zinbo,1934
Oxyperas aspersa (G.B. I Sowerby, 1825)
Mactra asymmetrica (FOSSIL) Krishtofovich, 1954 †
Mactra auca (FOSSIL) d'Orbigny, 1842 †
Mactromeris ausiensis (FOSSIL) L. Krishtofovich, 1994 †
Mactra austeniana (FOSSIL) C.J. Maury, 1912 †
Spisula austini (K.L. Lamprell& T. Whitehead, 1990)
Lutraria australis (FOSSIL) G.P. Deshayes, 1855 †
Mactra australis J.B.P.A. Lamarck, 1818
Avimactra aviculoides (FOSSIL) Andrussov 1905 †
Mactra axiniformis (FOSSIL) R. Tate, 1887 †
Mactra basteroti (FOSSIL) C. Mayer, 1853 †
Oxyperas belliana (W.R.B. Oliver, 1915)
Oxyperas bernardi (H.A. Pilsbry, 1904)
Ruellia bernayi (FOSSIL) (A.E.M. Cossmann, 1886 †)
Cymbophora berryi (FOSSIL) Gardner, 1916 †
Mulinia bicolor J.E. Gray, 1837
Scalpomactra biconvexa (FOSSIL) Powell & J.A. Bartrum,1929 †
Mactromeris bisculpturata (FOSSIL) Anderson & G.D. Hanna,1942 †
Maorimactra bodmani (FOSSIL) J.D. Stilwell& Zinsmeister, 1992 †
Mactra braziera E.A. Smith, 1891
Mactromeris brevirostrata (FOSSIL) A. Packard, 1916 †
Spisula brombachensis (FOSSIL) D.H. Schneider& O. Mandic, 2014 †
Barymactra bucklandi (FOSSIL) (Defrance 1823) †
Lutraria budkeri M. Nicklés, 1955
Mactra bulgarica (FOSSIL) (F. Toula, 1909 †)
Mactra burdigalensis (FOSSIL) C. Mayer, 1864 †
Mulinia byronensis Gray, 1837
Spisula caleta (FOSSIL) A.A. Olsson, 1928 †
Mactrotoma californica (T.A. Conrad, 1837)
Oxyperas callistoides (FOSSIL) A.A. Olsson, 1928 †
Raeta campechiensis (J.E. Gray, 1825)