Mimachlamys meli T. Cossignani, 2016
Palliolum mellevillei (FOSSIL) (A.V.M.D. D'Orbigny,1850 †)
Argopecten mendenhalli (FOSSIL) R. Arnold, 1906 †
Chlamys menkrawitensis (FOSSIL) C. Beets, 1941 †
Lyropecten menthifontis (FOSSIL) Glawe, 1970 †
Chlamys mercuria (FOSSIL) J. Marwick, 1928 †
Swiftopecten merklini (FOSSIL) V.N. Sinelnikova, 1975 †
Pecten meseticus (FOSSIL) C.J. Maury, 1920 †
Pecten mexicanus (FOSSIL) Perrilliat, 1992 †
Batequeus mezquitalensis (FOSSIL) R.L. Squires & Demetrion,1990 †
Delectopecten micaceus (P. Dautzenberg& A.R.J.B. Bavay, 1912)
Antillipecten microlineatus (FOSSIL) Waller, 2011 †
Chesapecten middlesexensis (FOSSIL) (W.C. Mansfield, 1936 †)
Lyropecten miguelensis (FOSSIL) R. Arnold, 1906 †
Caribachlamys mildredae (Bayer, 1941)
Flexopecten miles (L.A. Reeve, 1853)
Costicamptonectes milnelandensis (FOSSIL) Fürsich, 1982 †
Chlamys milvus (FOSSIL) Cox, 1928 †
Boreionectes mimikirensis (FOSSIL) Kurata & Kimura, 1951 †
Amusium mimyum (FOSSIL) W.P. Woodring, 1982 †
Haumea minuta (C. Linnaeus, 1758)
Palliolum minutulum H.H. Dijkstra& V.R. Southgate, 2000
Hyalopecten mireilleae H.H. Dijkstra, 1995
Mirapecten miricus (FOSSIL) (Reeve 1843) †
Mirapecten mirificus (L.A. Reeve, 1853)
Mirapecten mirificus thaanumi (W.H. Dall, P. Bartsch& H.A. Rehder, 1939)
Chlamys miurensis (FOSSIL) Yokoyama, 1920 †
Chlamys miyatokoensis (FOSSIL) S. Nomura & K.M. Hatai,1937 †
Lyropecten modulatus (FOSSIL) L.G. Hertlein, 1925 †
Laevichlamys mollitus (L.A. Reeve, 1853)
Mirapecten moluccensis H.H. Dijkstra, 1988
Radulonectites mongkensis (FOSSIL) Milova, 1985 †
Chesapecten monicae (FOSSIL) Ward, 1992 †
Nippononectes monobensis (FOSSIL) Tashiro, 1982 †
Neithea morrisi (FOSSIL) Pictet & Renevier, 1858 †