Didacna rudis (FOSSIL) Nalivkin †
Trachycardium rugosum (FOSSIL) (J.B.P.A. Lamarck,1819 †) Iran
Ciliatocardium sachalinense (FOSSIL) (Khramova, 1962 †) Russia, Moneron Island
Microcardium sakuraii (T. Habe, 1961) Philippines, Aliguay Island11 mm
Cardium sallomacense (FOSSIL) A.E.M. Cossmann& M.A. Peyrot, 1911 † France, Aquitaine30 mm
Nemocardium salrivale (FOSSIL) † USA, Louisiana, Natchitoches
Trigoniocardia samanicum (FOSSIL) A.A. Olsson, 1928 † Peru, Piura, Sullana
Keenaea samarangae (J. Makiyama, 1934) Japan, Mikawa bay23,5 mm
Trigoniocardia sambaicum (FOSSIL) C.J. Maury, 1917 † Dominican Republic, Monte Cristi
Frigidocardium sancticaroli J.J. Ter Poorten& J. Poutiers, 2009 Philippines, Aliguay Island10,4 mm
Cardium sarmaticum (FOSSIL) Barbot in Kolenikov,1935 † Bulgaria40 mm
Cardium saucatsense (FOSSIL) C. Mayer, 1866 † France, Aquitaine35 mm
Parvicardium scabrum (R.A. Philippi, 1844) France, Quiberon9 mm
Fulvia scalata E. Vidal, 1994 Philippines, Zamboanga19 mm
Trachycardium schencki (FOSSIL) L.W. Wiedey, 1928 † USA, California, Ventura
Ciliatocardium schmidti (FOSSIL) (Khramova, 1962 †) Russia, Sakhalin Island
Schedocardia schweinfurthi (FOSSIL) (Mayer-Eymar 1883) †
Plagiocardium scobinula (FOSSIL) (G.P. Deshayes, 1858 †) Germany, Rheinland-Pfalz8 mm
Parvicardium scriptum (M.E.J. Bucquoy, P. Dautzenberg& G.F. Dollfus, 1892) Spain5 mm
Fragum scruposum (G.P. Deshayes, 1855) Japan, Kagoshima11 mm
Fragum scruposum bannoi Y. Otuka, 1937 South China Sea14,8 mm
Pseudocatillus securus (FOSSIL) (Papaianopol, 1992 †) Romania, Vulcana-Pandele
Acrosterigma selene E. Vidal, 1999 New Caledonia
Fragum sellardsi (FOSSIL) Gardner, 1926 † Florida9 mm
Nemocardium semiasperum (FOSSIL) (G.P. Deshayes, 1858 †) France, Paris Basin25 mm
Nemocardium semidecussatum (FOSSIL) A. von Koenen † Ukraine18 mm
Cardium semiglabrum (FOSSIL) Phillips, 1829 † UK, England, North Yorkshire
Monodacna semipellucida (B.M. Logvinenko& Y.I. Starobogatov, 1967)
Papyridea semisulcata (J.E. Gray, 1825) Saint Croix9,3 mm
Pratulum semitectum (FOSSIL) (J. Marwick, 1926 †) New Zealand
Dallocardia senticosum (Sowerby, 1833) Panama31 mm
Pseudocatillus septemputeanus (FOSSIL) Ebersin, 1967 † Russia
Hedecardium septuagenarium (FOSSIL) (R. Tate, 1887 †) Tasmania
Laevicardium serratum (C. Linnaeus, 1758) Bahamas44,4 mm
Laevicardium serratum oviputamen (L.A. Reeve, 1844) Panama East40 mm