Mimachlamys robinaldina (FOSSIL) (A.V.M.D. D'Orbigny,1847 †) Argentina, Neuquen
Neithea roemeri (FOSSIL) J. Hill, 1889 † Texas, Austin
Chlamys rogersii (FOSSIL) T.A. Conrad, 1834 †
Chlamys rollei (FOSSIL) F. Stoliczka, 1861 † Greenland, Cape Stosch
Chlamys rosealbus (O.A. Scarlato, 1981) Japan Sea58 mm
Camptochlamys rosimon (FOSSIL) d'Orbigny, 1850 † France, Picardie, Aisne
Serratovola rubicunda (C.A. Récluz, 1843) Philippines, Masbate Island28 mm
Serratovola rubicunda aspera (G.B. Sowerby, 1842) Philippines, Palawan Island28 mm
Serratovola rubicunda passerina (R.B. Hinds, 1845) Philippines, Masbate Island30 mm
Chlamys rubida R.B. Hinds, 1845 USA, Washington62 mm
Laevichlamys rubromaculata (G.B. II Sowerby, 1842) Israel, Eilat35,4 mm
Laevichlamys ruschenbergeri (G.W. Tryon, 1869)
Azumapecten ruschenbergerii (G.W. Tryon, 1869) Egypt, Sinai73 mm
Radulopecten rushdenensis (FOSSIL) J. Lycett, 1863 † France, Picardie, Aisne
Chlamys russata L.A. Reeve, 1853 Hawaii
Chlamys rutteni (FOSSIL) Martin, 1914 † Indonesia, Yogyakarta
Chlamys sacyi (FOSSIL) A.E.M. Cossmann& M.A. Peyrot, 1921 † France, Aquitaine
Chlamys sanctiludovici (FOSSIL) Anderson & Martin, 1914 †
Camptonectes sandsfootensis (FOSSIL) Arkell W J † UK, England
Hunanonectes sanduensis (FOSSIL) Y. Fang, 1978 † China, Hunan, Chenzhou
Mimachlamys sanguinea (C. Linnaeus, 1758) Philippines, Cebu87 mm
Mimachlamys sanguinea porphyrea (C. Linnaeus, 1758) Philippines, Cebu68,8 mm
Chlamys sanguinolenta (FOSSIL) (J.F. Gmelin, 1791 †) Somalia, Baghenda
Pecten sansebastianus (FOSSIL) C.J. Maury, 1920 † Puerto Rico, Lares
Pecten santacruzensis (FOSSIL) R. Arnold, 1906 †
Chesapecten santamaria (FOSSIL) (Tucker, 1934 †) USA, Maryland, Dorchester
Chlamys santamaria (FOSSIL) W.C. Mansfield, 1936 † USA, Virginia, Surry
Pecten santarosanus (FOSSIL) Bose, 1905 † Mexico, Veracruz, Tantoyuca
Minnivola sapolwanaensis (FOSSIL) G.S. Carter, 1966 † South Africa, KwaZulu-Natal, Umkhanyakude
Pecten saskatchewanensis (FOSSIL) Warren, 1934 † Canada, Saskatchewan, Division No. 7
Chlamys satoi (FOSSIL) Yokoyama, 1928 † Okinawa
Laevichlamys sauciata (J.F. Gmelin, 1791)
Chesapecten sayanus (FOSSIL) (W.H. Dall, 1898 †) USA, Delaware
Chlamys scabrellus (FOSSIL) J.B.P.A. Lamarck, 1819 † Italy, Piemonte
Mimachlamys scabricostata (Sowerby, 1915) West Australia, Dampier53 mm