Macoma lama P. Bartsch, 1929
Macoma lamproleuca (H.A. Pilsbry & H.N. Lowe,1932)
Macoma lenis (FOSSIL) T.A. Conrad, 1843 †
Macoma leognanensis (FOSSIL) A.E.M. Cossmann& M.A. Peyrot, 1910 †
Macoma levior G.B. Sowerby, 1904
Macoma limula W.H. Dall, 1895
Macoma lipara W.H. Dall, 1916
Macoma lissoni (FOSSIL) A.A. Olsson, 1931 †
Macoma litoralis (C.F.F. von Krauss, 1848)
Macoma loveni (FOSSIL) (J.J.S. Steenstrup,1882 †)
Macoma loveni Jensen, 1905
Macoma lucerna (S.C.T. Hanley, 1844)
Macoma marylandica (FOSSIL) L.C. Glenn, 1904 †
Macoma medioamericana A.A. Olsson, 1942
Macoma meroensis (FOSSIL) A.A. Olsson, 1931 †
Macoma middendorffi W.H. Dall, 1884
Macoma mitchelli W.H. Dall, 1895
Macoma moesta (G.P. Deshayes, 1855)
Macoma murrayana (A.E. Salisbury, 1934)
Macoma nasuta (T.A. Conrad, 1837)
Macoma nobilis (S.C.T. Hanley, 1845)
Macoma obesa (FOSSIL) Krishtofovich, 1969 †
Macoma obliqua (J. de C. Sowerby, 1817)
Macoma optiva (FOSSIL) (M. Yokoyama, 1923 †)
Macoma osakaensis (FOSSIL) Krishtofovich, 1957 †
Macoma panamensis W.H. Dall, 1900
Macoma paralenis (FOSSIL) Gardner, 1947 †
Macoma pellucida (R.A. Philippi, 1843)
Macoma perplana (FOSSIL) (H.F.A. von Ihering,1897 †)
Macoma petalum (A. Valenciennes, 1821)
Macoma phenax W.H. Dall, 1900
Macoma planuiscula J. Grant & H.R. Gale,1931
Macoma praemitis A. Römer, 1872
Macoma praetenuis (FOSSIL) Leathes in Woodward,1830 †
Macoma pseudofallax R. von Cosel, 1995