Acila mirabilis (Adams & L.A. Reeve,1850)
Nucula mirada (FOSSIL) A.A. Olsson, 1964 †
Ennucula mirifica (W.H. Dall, 1907)
Palaeonucula misolensis (FOSSIL) (Jaworski, 1915 †)
Nucula mitralis R.B. Hinds, 1843
Nucula mixta (FOSSIL) G.P. Deshayes, 1858 †
Truncacila moneronica (FOSSIL) Slodkewitsch, 1967 †
Nuculopsis montpelierensis (FOSSIL) (Girty, 1910 †)
Nucula morundiana (FOSSIL) R. Tate, 1886 †
Palaeonucula muffleri (FOSSIL) McRoberts, 2017 †
Nucula multidentata B. Prashad, 1933
Truncacila munda (FOSSIL) Kalishevich, 1969 †
Ennucula musculosa (FOSSIL) Anelli & al., 2006 †
Truncacila muta (FOSSIL) (Clark, 1918 †)
Truncacila nagaoi (FOSSIL) K. Oyama & A. Mizuno,1958 †
Leionucula naibensis (FOSSIL) Kalishevich, 1969 †
Truncacila nakazimai (FOSSIL) Y. Otuka, 1939 †
Nucula narica (FOSSIL) E.W. Vredenburg, 1928 †
Palaeonucula navis (FOSSIL) (L.É.S. Piette, 1868 †)
Nucula nejdensis (FOSSIL) Abbass, 1972 †
Gibbonucula neocorbuliformis (FOSSIL) Eames 1954 †
Nucula ngatutura C.R. Laws, 1936
Nucula nicklesi R. von Cosel, 1995
Ennucula niponica (Smith, 1885)
Nucula nitidosa R. Winckworth, 1930
Nucula nitidosa nitida (G.B. II Sowerby, 1833)
Nucula nitidula Adams, 1856
Nucula nitidulaformis Powell, 1971
Nucula njalindungensis (FOSSIL) Martin, 1919 †
Nucula notobenthalis K.H.J. Thiele, 1912
Leionucula nova (FOSSIL) (Wickens, 1911 †)
Nucula nucleus (C. Linnaeus, 1758)
Ennucula nuculana (FOSSIL) (W.H. Dall †)
Ennucula obliqua (J.B.P.A. Lamarck, 1819)
Nucula observatoria (FOSSIL) H.F.A. von Ihering,1907 †