Cardium bouryi (FOSSIL) A.E.M. Cossmann, 1886 †
Dallocardia bowdenense (FOSSIL) (W.H. Dall, 1900 †)
Trachycardium brantlyi (FOSSIL) N.E. Weisbord, 1929 †
Laevicardium brasilianum (J.B.P.A. Lamarck, 1819)
Nemocardium brasiliense (FOSSIL) White, 1887 †
Fuscocardium braunsi (FOSSIL) (S. Tokunaga, 1937 †)
Schedocardia brewerii (FOSSIL) (W.M. Gabb, 1864 †)
Ciliatocardium brooksi (FOSSIL) (Clark, 1932 †)
Perucardia brueggeni (FOSSIL) (Olsson 1944) †
Hedecardium brunneri (FOSSIL) (J. Hector, 1886 †)
Protocardia buckmani (FOSSIL) Morris & J. Lycett,1853 †
Bucardium buekkianum (FOSSIL) Telegdi-Roth, 1914 †
Keenocardium buelowi (H. Rolle, 1896)
Papyridea bulbosa (FOSSIL) (W.H. Dall, 1900 †)
Acrosterigma burchardi (R.W. Dunker, 1877)
Cardium burdigalinum (FOSSIL) J.B.P.A. Lamarck, 1819 †
Americardia burnsii (FOSSIL) (W.H. Dall, 1900 †)
Vepricardium burnupi (G.B. III Sowerby, 1897)
Dinocardium cabezai (FOSSIL) Gardner, 1945 †
Trigoniocardia cabopasadum (FOSSIL) H.A. Pilsbry& A.A. Olsson, 1941 †
Pseudofulvia caledonica E. Vidal & L. Kirkendale,2007
Keenocardium californiense (G.P. Deshayes, 1839)
Keenocardium californiense comoxense (W.H. Dall, 1900)
Keenocardium californiense middendorffi A.I. Kafanov, 1999
Cerastoderma calvertensium (FOSSIL) L.C. Glenn, 1904 †
Titanocardium cantuariense (FOSSIL) C.R. Laws, 1933 †
Europicardium caparti (Nickles, 1955)
Acrosterigma capricorne E. Vidal & L. Kirkendale,2007
Papyridea capsoides (FOSSIL) J.F. Bayan, 1873 †
Corculum cardissa (C. Linnaeus, 1758)
Corculum cardissa dionaeum G.B. I Sowerby, 1829
Corculum cardissa kirai T. Shikama, 1964
Corculum cardissa laevigatum (P. Bartsch, 1947)
Corculum cardissa obesum P. Bartsch, 1947
Fragum carinatum H. Lynge, 1909