Vilasina sinica (Z.R. Wang & Z. Qi, 1984)
Mytella sinuosa (P.P. King, 1831)
Crenella skomma (R.A. Mclean& J.S. Schwengel, 1944)
Adula snatolensis (FOSSIL) V.N. Sinelnikova, 1991 †
Solamen snaverlyi (FOSSIL) W.O. Addicott, 1976 †
Mytilus snohomishensis (FOSSIL) C.S. Weaver, 1912 †
Modiolus solea (FOSSIL) Slodkewitsch, 1936 †
Adula soleniformis (A.V.M.D. D'Orbigny,1842)
Modiolus solenoides (FOSSIL) Morris & J. Lycett,1853 †
Mytilaster solidus (T.A. de M. Monterosato,1883)
Mytilaster solisianus (A.V.M.D. D'Orbigny,1842)
Musculus somaliensis (FOSSIL) Cox, 1935 †
Arcuatula sootryeni (FOSSIL) Stillwell & Zinmeister 1992 †,
Arcuatula sootryeni (FOSSIL) J.D. Stilwell& Zinsmeister, 1992 †
Musculus sorgenfreii (FOSSIL) Anderson, 1967 †
Amygdalum soyoae T. Habe, 1958
Mytilus spathulatus (FOSSIL) Seeley †
Leiosolenus spatiosus (P.P. Carpenter, 1857)
Mytella speciosa (L.A. Reeve, 1857)
Modiolus speciosus (FOSSIL) Devjatilova, 1981 †
Modiolus speciosus (FOSSIL) Merla, 1933 †
Solamen spectabilis (A. Adams, 1862)
Dacrydium speculum J. Poutiers, 1989
Gregariella splendida (L.A. Reeve, 1858)
Septifer squama (FOSSIL) L. Waagen, 1881 †
Modiolus squamosus I. Beauperthuy, 1967
Musculus sternbergensis (FOSSIL) Anderson, 1967 †
Modiolus strajeskianus (FOSSIL) d'Orbigny, 1845 †
Lithophaga straminea (L.A. Reeve, 1857)
Inoperna striata (FOSSIL) Repin, 2008 †
Crenella striatina (FOSSIL) G.P. Deshayes, 1858 †
Solamen striatissima (G.B. III Sowerby, 1904)
Brachidontes striatulus (S.C.T. Hanley, 1843)
Amygdalum striatum (F.W. Hutton, 1873)
Musculus strigatus (S.C.T. Hanley, 1843)