Strophiops marmorosa C.J. Maynard& W.F. Clapp, 1920 Bahamas
Strophiops martensi (C.D. Weinland, 1862) Bahamas
Strophiops martensi cliffordi W.J. Clench, 1933 Bahamas
Cerion martinianus H.C. Küster, 1844 Caymans
Cerion maynardi H.A. Pilsbry& E.G. Vanatta, 1895 Cuba17,3 mm
Strophiops mayoi C.J. Maynard& W.F. Clapp, 1921 Bahamas
Strophiops mcleani W.J. Clench, 1952 Bahamas
Strophiops media C.J. Maynard, 1896 Caribbean
Cerion melanostoma W.J. Clench, 1934 Bahamas
Cerion microdon H.A. Pilsbry& E.G. Vanatta, 1896 Cuba
Cerion microstomum (L. Pfeiffer, 1854) Cuba
Strophiops migratoria C.J. Maynard& W.F. Clapp, 1921 Bahamas
Cerion migueleti M.I. Sánchez Roig, 1951 Caribbean
Cerion miguelinum A. Gonzalez Guillén, 2008 Caribbean
Cerion milleri (L. Pfeiffer, 1867) Bahamas22 mm
Cerion minae C. de la Torre & Bermúdez Cuba
Strophiops minima C.J. Maynard, 1924 Caribbean
Brasilennea minor (FOSSIL) Trindade, 1956 †
Cerion minor H.C. Küster, 1847 Caribbean
Cerion miramarae M.I. Sánchez Roig, 1951 Cuba
Strophiops mitra C.J. Maynard& W.F. Clapp, 1920 Bahamas
Cerion mixta (C.J. Maynard& W.F. Clapp, 1921) Bahamas29 mm
Strophiops mobile C.J. Maynard& W.F. Clapp, 1921 Caribbean
Cerion monaense W.J. Clench, 1951 Bahamas
Strophiops montana C.J. Maynard, 1924 Bahamas
Cerion mortuorium C. de la Torre, 1953 Caribbean
Strophiops morula C.J. Maynard& W.F. Clapp, 1915 Bahamas
Strophiops multa C.J. Maynard, 1913 Bahamas
Cerion multicosta (H.C. Küster, 1845) Cuba
Cerion multistriatum (H.C. Küster, 1845) Cuba24,8 mm
Cerion mumia (J.G. Bruguière, 1792) Cuba36,1 mm
Cerion mumia chrysalis (A.E.J. Férussac in H.H. Beck, 1837) Cuba25 mm
Cerion mumia gigantea M.I. Sánchez Roig, 1951 Cuba32 mm
Cerion mumia hondanum H.A. Pilsbry, 1902 Cuba
Cerion mumia magister H.A. Pilsbry& E.G. Vanatta, 1896 Cuba39,8 mm