Didacna rudis (FOSSIL) Nalivkin †
Trachycardium rugosum (FOSSIL) (J.B.P.A. Lamarck,1819 †)
Ciliatocardium sachalinense (FOSSIL) (Khramova, 1962 †)
Microcardium sakuraii (T. Habe, 1961)
Cardium sallomacense (FOSSIL) A.E.M. Cossmann& M.A. Peyrot, 1911 †
Nemocardium salrivale (FOSSIL) †
Trigoniocardia samanicum (FOSSIL) A.A. Olsson, 1928 †
Keenaea samarangae (J. Makiyama, 1934)
Trigoniocardia sambaicum (FOSSIL) C.J. Maury, 1917 †
Frigidocardium sancticaroli J.J. Ter Poorten& J. Poutiers, 2009
Cardium sarmaticum (FOSSIL) Barbot in Kolenikov,1935 †
Cardium saucatsense (FOSSIL) C. Mayer, 1866 †
Parvicardium scabrum (R.A. Philippi, 1844)
Fulvia scalata E. Vidal, 1994
Trachycardium schencki (FOSSIL) L.W. Wiedey, 1928 †
Ciliatocardium schmidti (FOSSIL) (Khramova, 1962 †)
Schedocardia schweinfurthi (FOSSIL) (Mayer-Eymar 1883) †
Plagiocardium scobinula (FOSSIL) (G.P. Deshayes, 1858 †)
Parvicardium scriptum (M.E.J. Bucquoy, P. Dautzenberg& G.F. Dollfus, 1892)
Fragum scruposum (G.P. Deshayes, 1855)
Fragum scruposum bannoi Y. Otuka, 1937
Pseudocatillus securus (FOSSIL) (Papaianopol, 1992 †)
Acrosterigma selene E. Vidal, 1999
Fragum sellardsi (FOSSIL) Gardner, 1926 †
Nemocardium semiasperum (FOSSIL) (G.P. Deshayes, 1858 †)
Nemocardium semidecussatum (FOSSIL) A. von Koenen †
Cardium semiglabrum (FOSSIL) Phillips, 1829 †
Monodacna semipellucida (B.M. Logvinenko& Y.I. Starobogatov, 1967)
Papyridea semisulcata (J.E. Gray, 1825)
Pratulum semitectum (FOSSIL) (J. Marwick, 1926 †)
Dallocardia senticosum (Sowerby, 1833)
Pseudocatillus septemputeanus (FOSSIL) Ebersin, 1967 †
Hedecardium septuagenarium (FOSSIL) (R. Tate, 1887 †)
Laevicardium serratum (C. Linnaeus, 1758)
Laevicardium serratum oviputamen (L.A. Reeve, 1844)