Scapharca collazica (FOSSIL) L.G. Sheldon & C.J. Maury,1920 †
Lunarca colombiana (FOSSIL) Clark & J.W. Durham,1946 †
Calloarca colpodes (R.N. Kilburn, 1983)
Anadara columba (FOSSIL) A.A. Olsson, 1932 †
Arca columbiana (FOSSIL) C.S. Weaver& K.V.W. Palmer, 1922 †
Barbatia cometa (L.A. Reeve, 1844)
Anadara compacta (L.A. Reeve, 1844)
Barbatia complanata (J.G. Bruguière, 1789)
Anadara concinna (G.B. I Sowerby, 1833)
Acar congenita (E.A. Smith, 1885)
Anadara consociata (E.A. Smith, 1885)
Arca constantinensis (FOSSIL) A.E.M. Cossmann& G. Pissarro, 1903 †
Barbatia consutilis (FOSSIL) R. Tate, 1886 †
Anadara corbuloides (T.A. de M. Monterosato,1878)
Cunearca corcupidonis (FOSSIL) C.J. Maury, 1917 †
Arca cordata (FOSSIL) Benett, 1831 †
Scapharca cordicosta (FOSSIL) D.T. Dockery, 1982 †
Anadara cornellana (FOSSIL) F. Hodson & al., 1927 †
Bathyarca corpulenta (Smith, 1885)
Anadara corrugata (É. Lamy, 1907)
Barbatia corvamnis (FOSSIL) G.F. Harris, 1946 †
Anadara costaricensis (FOSSIL) A.A. Olsson, 1922 †
Barbatia costellata (FOSSIL) Tiwari, 2001 †
Arca cottoni (FOSSIL) Waghorn, 1926 †
Arca coxi (FOSSIL) A. Dey, 1961 †
Cunearca crandalli (FOSSIL) C.J. Maury, 1924 †
Scapharca crashleyi (FOSSIL) C.J. Maury, 1924 †
Anadara crassicosta (FOSSIL) A. Heilprin, 1887 †
Anadara crassicostata (H. Adams, 1873)
Scapharca crassissima O. Macsotay & B. Campos,2001
Anadara craticulata (P. Nyst, 1848)
Anadara crebricostata (L.A. Reeve, 1844)
Bathyarca crenulifera (FOSSIL) (J. Marwick, 1931 †)
Anadara cretacea (FOSSIL) T.A. Conrad, 1869 †
Barbatia crustata (FOSSIL) R. Tate, 1886 †