Acar abdita P.G. Oliver& H.C.G. Chesney, 1994
Arca abrupta E. Forbes, 1846
Anadara actinophora (FOSSIL) W.H. Dall, 1898 †
Arca acuminata C.F.F. von Krauss, 1848
Asperarca acuta (FOSSIL) Berezovsky, 2014 †
Anadara adamsi A.A. Olsson, 1961
Tegillarca addita (T. Iredale, 1939)
Bathyarca adelaideana (T. Iredale, 1929)
Arca adunca A. Adams & L.A. Reeve,1850
Barbatia aegyptiaca (FOSSIL) Fourtau, 1917 †
Anadara aequalitas (FOSSIL) H.I. Tucker & D. Wilson,1932 †
Anadara aequatorialis (A.V.M.D. D'Orbigny,1846)
Anadara aequicostata (FOSSIL) (T.A. Conrad, 1845 †)
Tegillarca aequilatera (R.W. Dunker, 1868)
Anadara aethiopica (K.H.J. Thiele& S.G.A. Jaeckel, 1931)
Anadara agnastha (FOSSIL) W.P. Woodring, 1925 †
Scapharca aguadica (FOSSIL) L.G. Sheldon & C.J. Maury,1920 †
Acar agulhasensis (K.H.J. Thiele& S.G.A. Jaeckel, 1931)
Mimarcaria aizoi (K. Sakurai, 1969)
Barbatia albertina (FOSSIL) (d'Orbigny) †
Samacar aleutica (G.M. Kamenev, 2007)
Hawaiarca alia W.H. Dall & al., 1938
Anadara aliena (T. Iredale, 1939)
Mesocibota allocostata (P.G. Oliver& R. von Cosel, 1993)
Calloarca alternata (G.B. I Sowerby, 1833)
Anadara ambigua (L.A. Reeve, 1844)
Anadara amicula (FOSSIL) M. Yokoyama, 1925 †
Barbatia amygdaloides (FOSSIL) G.P. Deshayes, 1858 †
Barbatia amygdalumtostum (P.F. Röding, 1798)
Bathyarca anaclima (J.C. Melvill & R. Standen,1907)
Anadara andrewsi (FOSSIL) Ward, 1992 †
Anadara angicostata (L.A. Reeve, 1844)
Barbatia angusta (FOSSIL) (J.B.P.A. Lamarck,1805 †)
Bathyarca anomala Verill & K.J. Bush, 1898
Anadara antiquata (C. Linnaeus, 1758)