Europicardium serrulatum (G.P. Deshayes, 1855) Senegal, Dakar20,5 mm
Europicardium serrulatum kobelti (H. von Maltzan, 1885) Angola50,3 mm
Nemocardium serum (FOSSIL) (F.W. Hutton, 1873 †)
Maoricardium setosum (J.H. Redfield, 1846) South China Sea71 mm
Acrosterigma seurati E. Vidal, 1999 Tuamotu
Vasticardium sewelli (B. Prashad, 1932) Philippines, Panay Island17 mm
Hedecardium sharpei (FOSSIL) (Archaic & Haime, 1854 †) India, Gujarat, Kachchh
Afrocardium shepstonense J.R. le B. Tomlin, 1931 South Africa, Algoa Bay8,2 mm
Ciliatocardium shinjiense (FOSSIL) (M. Yokoyama, 1923 †) Japan, Shimane, Izumo
Serripes shiobaraensis (FOSSIL) H. Noda, 1962 † Russia, Sakhalin
Clinocardium shiobarense (FOSSIL) (M. Yokoyama, 1926 †) Eastern Kamchatka
Hypanis sidorovi (Y.I. Starobogatov, 1974)
Americardia silvacollina (FOSSIL) D.T. Dockery, 1982 † USA, Mississippi
Parvicardium simile (Milaschewisch, 1909)
Serripes similis (FOSSIL) A.I. Kafanov, 1994 † Russia, Moneron Island
Microcardium simillimum (E.A. Smith, 1896) Sri Lanka
Acrosterigma simplex (L. Spengler, 1799) Philippines, Calituban Island59 mm
Granocardium simplex (FOSSIL) J.H.F. Douvillé, 1916 † Egypt, Hasna
Apiocardia simrothi (FOSSIL) (W.H. Dall, 1900 †) Florida11 mm
Trachycardium sindiense (FOSSIL) E.W. Vredenburg, 1928 † Somalia, Bari, Iskushuban
Vepricardium sinense (Sowerby, 1841) Hong Kong37 mm
Ciliatocardium smekhovi (FOSSIL) A.I. Kafanov & Savizky,1982 † Russia, Moneron Island
Cardium soldani (FOSSIL) Stoppani, 1863 † Italy, Lombardia, Bergamo
Papyridea soleniformis (J.G. Bruguière, 1789) Martinique30,7 mm
Pseudocatillus solitarius (FOSSIL) (Papaianopol, 1992 †) Romania, Vulcana-Pandele28,6 mm
Protocardia somaliensis (FOSSIL) Cox, 1935 † Saudi Arabia
Vasticardium somnueki Hylleberg, 2015
Acrosterigma sorenseni (A.W.B. Powell, 1958) New Zealand
Agnocardia sorrentoense (FOSSIL) (G.D. Hanna, 1927 †) USA, California
Maoricardium spatiosum (FOSSIL) (F.W. Hutton, 1873 †) New Zealand, North Island130 mm
Americardia speciosa (A. Adams & L.A. Reeve,1850) Saint Helena
Protocardia sphaeroidea (FOSSIL) (E. Forbes, 1845 †) UK, Isle of Wight
Cardium spillmani (FOSSIL) T.A. Conrad, 1858 †
Acanthocardia spinosa (FOSSIL) (D.C. Solander, 1786 †) Italy, Emilia50 mm
Acanthocardia spinosa (J. Lightfoot, 1786) Italy, Trapani84,2 mm