Agnocardia spinosifrons (FOSSIL) E.H. Vokes, 1984 †
Discors spondyloides (FOSSIL) (J. Von Hauer, 1847 †)
Lymnocardium squamulosum (FOSSIL) G.P. Deshayes †
Pachycardium stantoni (FOSSIL) (B. Wade, 1926 †)
Keenocardium starobogatovi (FOSSIL) A.I. Kafanov & Savizky,1982 †
Parvicardium straeleni (FOSSIL) (M. Glibert, 1945 †)
Maoricardium strangi (FOSSIL) (C.R. Laws, 1930 †)
Protocardia striatula (FOSSIL) (Sowerby, 1829 †)
Phlogocardia striatum (FOSSIL) (J. Brown & H.A. Pilsbry,1911 †)
Protocardia stricklandi (FOSSIL) Morris & J. Lycett,1853 †
Cardium strigilliferum (FOSSIL) Wood, 1840 †
Cardium subalternatum (FOSSIL) E.F. de Vogel, 1895 †
Vasticardium subassimile (E. Vidal, 2003)
Hedecardium subcordatum (FOSSIL) (H.H. Suter, 1917 †)
Laevicardium subcostale (FOSSIL) (A. Petrov, 1982 †)
Pseudocatillus subdentatum (FOSSIL) (G.P. Deshayes, 1838 †)
Nemocardium subdiscors (FOSSIL) (A.V.M.D. D'Orbigny,1850 †)
Microfragum subfestivum (E. Vidal & L. Kirkendale,2007)
Cardium subfragile (FOSSIL) A.V.M.D. D'Orbigny,1850 †
Nemocardium subfraterculus (FOSSIL) (Dufour, 1881 †)
Cardium subgratum (FOSSIL) Dufour, 1881 †
Cardium subguttiferum (FOSSIL) (D'Archiac, 1854 †)
Cardium subhispidum (FOSSIL) Hilber †
Loxocardium sublima (FOSSIL) (A.V.M.D. D'Orbigny,1850 †)
Loxocardium sublimoides (FOSSIL) A.E.M. Cossmann, 1923 †
Pseudocatillus submedius (FOSSIL) A.M. Popov & Nevesskaja,2000 †
Apiocardia subovalis (W.J. Broderip & Sowerby,1829)
Cardium subpassyi (FOSSIL) Dufour, 1881 †
Pseudocatillus subpolemonis (FOSSIL) Ebersin, 1967 †
Fulvia subquadrata E. Vidal & L. Kirkendale,2007
Protocardia subquadrata (FOSSIL) J. Evans & Shumard,1857 †
Laevicardium substriatum (T.A. Conrad, 1837)
Laevicardium substriatum elenensis (G.B. II Sowerby, 1840)
Laevicardium subturgidum (FOSSIL) (A.V.M.D. D'Orbigny,1852 †)
Laevicardium subturgidum millasiense C.F. Fontannes, 1881