Finlayella marshalli (FOSSIL) C.A. Fleming, 1950 †
Tellina martinicensis D'Orbigny, 1853
Macoma marylandica (FOSSIL) L.C. Glenn, 1904 †
Tellina masinguiensis (FOSSIL) Clark & J.W. Durham,1946 †
Tellina masoni (FOSSIL) R. Tate, 1887 †
Gastrana matadoa (J.F. Gmelin, 1791)
Cadella mauia W.H. Dall, P. Bartsch& H.A. Rehder, 1938
Afsharius mauritianus (J.M.R.M. Viader, 1951)
Megangulus maxima (FOSSIL) (T. Nagao, 1928 †)
Tellina maylandensis (FOSSIL) H.D. Russell & Landes,1937 †
Macoma medioamericana A.A. Olsson, 1942
Macomopsis melo (G.B. II Sowerby, 1866)
Tellina mera T. Say, 1834
Tellina merangiana (FOSSIL) Martin, 1922 †
Macoma meroensis (FOSSIL) A.A. Olsson, 1931 †
Tellina meropsis (W.H. Dall, 1900)
Angulus merus T. Say, 1834
Semelangulus mesodesmoides P.G. Oliver & M. Zuschin,2000
Linearis metastriata (FOSSIL) T.A. Conrad, 1860 †
Tellina methoria J.C. Melvill, 1897
Tellina mexicana (FOSSIL) R.E. Petit, 1841 †
Apolymetis meyeri (R.A. Philippi, 1846)
Pulvinus micans (S.C.T. Hanley, 1844)
Macoma middendorffi W.H. Dall, 1884
Eurytellina milamensis (FOSSIL) Garvie, 1996 †
Tellina minima (FOSSIL) G.P. Deshayes, 1857 †
Pseudarcopagia minuta O.A. Scarlato, 1965
Angulus minuta (C. Linnaeus, 1758)
Strigilla mirabilis R.A. Philippi, 1841
Macoma mitchelli W.H. Dall, 1895
Tellina miyatensis M. Yokoyama, 1920
Tellina modesta P.P. Carpenter, 1864
Abranda modestina (R. Tate, 1891)
Tellina modica R. von Cosel, 1995
Macoma moesta (G.P. Deshayes, 1855)