Protapes motsei J. Chen, S.P. Zhang& L.F. Kong, 2014
Tivela mulawana H.E.J. Biggs, 1969
Periglypta multicostata (G.B. I Sowerby, 1835)
Macridiscus multifarius Kong, A. Matsukuma& K.A. Lutaenko, 2012
Venus multilamella (FOSSIL) J.B.P.A. Lamarck, 1818 †
Chione multilamellata (FOSSIL) R. Tate, 1887 †
Callista multiradiata (G.B. II Sowerby, 1851)
Hysteroconcha multispinosus (Sowerby, 1851)
Notocallista multistriata (G.B. II Sowerby, 1851)
Meroena multisulcata (FOSSIL) (G.P. Deshayes, 1825 †)
Aphrodina munda (FOSSIL) L.W. Stephenson, 1953 †
Pitar mundus (A. Römer, 1861)
Chionopsis munsterii (FOSSIL) (A.V.M.D. D'Orbigny,1842 †)
Marama murdochi (FOSSIL) J. Marwick, 1927 †
Pitar murphyi (FOSSIL) Zinsmeister, 1983 †
Periglypta murrayana (FOSSIL) (R. Tate, 1887 †)
Lamelliconcha musanica (FOSSIL) A.A. Olsson, 1922 †
Liocyma nairoensis (FOSSIL) Krishtofovich, 1957 †
Marcia nakamurai (FOSSIL) N. Ikebe, 1941 †
Tivela nana (FOSSIL) L. Krishtofovich, 1991 †
Pelecyora nana (L.A. Reeve, 1850)
Hyphantosoma nancyae (K.L. Lamprell& T. Whitehead, 1990)
Mercenaria nannodes (FOSSIL) Gardner, 1947 †
Legumen napii (FOSSIL) McLearn, 1929 †
Tivela natalensis R.W. Dunker, 1858
Amiantis navidadensis (FOSSIL) D. Frassinetti& Covacevich, 1993 †
Eurhomalea navidadiformis (FOSSIL) D. Frassinetti& Covacevich, 1999 †
Gomphina neastartoides (M. Yokoyama, 1922)
Dosiniopsis nebrascensis (FOSSIL) F.B. Meek & Hayden,1876 †
Dosinia nedigna (T. Iredale, 1930)
Lamelliconcha negritensis (FOSSIL) A.A. Olsson, 1928 †
Meretrix negritosensis (FOSSIL) Woods,in Bosworth, 1922 †
Malarossia neos (FOSSIL) Berezovsky, 1999 †
Globivenus neozelanica (FOSSIL) J. Marwick, 1965 †
Katelysia neroni (J.B.P.A. Lamarck, 1818)