Minnivola pyxidata (I. von Born, 1778)
Pecten pyxidatus I. von Born, 1778
Neithea quadricostata (FOSSIL) (J. de C. Sowerby,1814 †)
Glorichlamys quadrilirata (C.E. Lischke, 1870)
Pecten quadriradiatus J.B.P.A. Lamarck, 1819
Antillipecten quemadosensis (FOSSIL) Waller, 2011 †
Chlamys quilonensis (FOSSIL) A. Dey, 1961 †
Neitheops quinquecostata (FOSSIL) (J. de C. Sowerby,1814 †)
Aequipecten radians (FOSSIL) (P. Nyst& G.D. Westendorp, 1839 †)
Decatopecten radula (C. Linnaeus, 1758)
Decatopecten radula griggi Webb, 1957
Pecten raduloides (FOSSIL) F. Stoliczka, 1871 †
Pecten raoulensis Powell, 1958
Semipallium rapanense (A.R.J.B. Bavay, 1905)
Mirapecten rastellum (J.B.P.A. Lamarck, 1819)
Euvola raveneli W.H. Dall, 1898
Mimachlamys reconditus (FOSSIL) (D.C. Solander, 1766 †)
Aequipecten redwoodensis (FOSSIL) D.T. Dockery, 1982 †
Argopecten reedsi (FOSSIL) E.H. Vokes, 1938 †
Annachlamys reevei (A. Adams in A. Adams& L.A. Reeve, 1850)
Pecten refugioensis (FOSSIL) L.G. Hertlein, 1925 †
Haumea rehderi (G. Grau, 1960)
Oppenheimopecten reliquus (FOSSIL) (J. Brown & H.A. Pilsbry,1913 †)
Chlamys rendoi (FOSSIL) H. Ozaki, 1958 †
Pecten renevieri (FOSSIL) Oppel, 1856 †
Chlamys reticulata (L.A. Reeve, 1853)
Praechlamys reticulata (FOSSIL) (Scholtheim 1823) †
Camptochlamys retiferus (FOSSIL) Morris & J. Lycett,1853 †
Argopecten revellei (FOSSIL) J.W. Durham, 1950 †
Pecten revolutus (FOSSIL) O.G. Michelotti †
Antillipecten reynali (FOSSIL) (D. Mongin, 1968 †)
Annachlamys rhipidata (FOSSIL) Beu & Darragh 2001 †
Camptonectes rigidus (FOSSIL) (Sowerby, 1818 †)
Gloripallium rikinnensis (FOSSIL) V.N. Sinelnikova, 1975 †
Pecten rinki Lundgren, 1895