Anadara campta (FOSSIL) W.P. Woodring, 1973 †
Anadara campyla (FOSSIL) W.H. Dall, 1898 †
Barbatia cancellaria (J.B.P.A. Lamarck, 1819)
Barbatia candida (G.S. Helbling, 1779)
Barbatia candida helblingii (J.G. Bruguière, 1789)
Arca capulopsis (FOSSIL) G.B. Pritchard, 1901 †
Anadara cardiiformis (B. de Basterot, 1825)
Acar carditaeformis (P. Dautzenberg& H. Fischer, 1897)
Anadara carmenensis (FOSSIL) Clark & J.W. Durham,1946 †
Barbatia carolinensis (FOSSIL) T.A. Conrad, 1849 †
Acar celleporacea (FOSSIL) R. Tate, 1886 †
Scaphula celox W.H. Benson, 1836
Anadara cepoides (L.A. Reeve, 1844)
Anadara cercadica (FOSSIL) C.J. Maury, 1917 †
Arca chambersi (FOSSIL) A.G. Beu, 1973 †
Anadara charcoazulensis (FOSSIL) A.A. Olsson, 1942 †
Anadara chavezi (FOSSIL) (Engerrand & Urbina,1910 †)
Anadara chemnitzii (R.A. Philippi, 1851)
Cunearca chemnitzioides (FOSSIL) C.J. Maury, 1912 †
Acar cheribonensis (FOSSIL) C.H. Oostingh, 1935 †
Arca chevallieri (FOSSIL) A.E.M. Cossmann, 1887 †
Anadara chichibuensis (FOSSIL) K.M. Hatai & S. Nisiyama,1952 †
Anadara chiriquiensis (FOSSIL) W.M. Gabb, 1861 †
Arca choffati (FOSSIL) Thurmann & Etallon,1863 †
Arca cholana (FOSSIL) E.M. Spieker, 1922 †
Scapharca chordicosta (FOSSIL) D.T. Dockery, 1982 †
Hawaiarca cibaoica (FOSSIL) (C.J. Maury, 1917 †)
Calloarca cibotina (J.C. Melvill & R. Standen,1907)
Rostarca ciplyensis (FOSSIL) (Vincent 1930) †
Anadara cistula (L.A. Reeve, 1844)
Anadara clampensis (FOSSIL) Sgarbossa 1977 †
Acar clathrata (J.L.M. Defrance, 1816)
Arca clellandi (FOSSIL) E. Forbes, 1846 †
Bathyarca coccus (K.H.J. Thiele& S.G.A. Jaeckel, 1931)
Barbatia cochlearis (FOSSIL) B. Wade, 1926 †