Dulcina madagascariensis R. von Cosel & P. Bouchet,2008
Sphaera madagascariensis (FOSSIL) R.B. Newton, 1889 †
Sphaeriola madridi (FOSSIL) (d'Archiac, 1843 †)
Pillucina maestratii Glover & J.D. Taylor,2016
Elliptiolucina magnifica R. von Cosel & P. Bouchet,2008
Ctena magnoliana (FOSSIL) W.H. Dall, 1903 †
Opalocina majuscula Glover & J.D. Taylor,2016
Taylorina makassar R. von Cosel & P. Bouchet,2008
Divalinga mancietensis (FOSSIL) Chavan 1951 †
Taylorina manusutor R. von Cosel & P. Bouchet,2008
Myrtea maoria (FOSSIL) Powell, 1935 †
Afranodontia marginodentata (FOSSIL) O.S. Adegoke, 1977 †
Troendleina marquesana R. von Cosel & P. Bouchet,2008
Mesolinga masatani (FOSSIL) I. Hayami, 1961 †
Lucina mattiformis (FOSSIL) L.W. Stephenson, 1941 †
Pillucina mauritiana E.A. Glover & D.W. Taylor,2001
Pegophysema mauryae (FOSSIL) (H.A. Pilsbry & Johnson,1917 †)
Anodontia maxima (FOSSIL) Martin, 1883 †
Myrtea mayi J.H. Gatliff & C.J. Gabriel,1911
Parvilucina mazatlanica (Carpenter, 1857)
Cryptolucina megadyseides (FOSSIL) Saul & al. 1996 †
Superlucina megameris (FOSSIL) (W.H. Dall, 1901 †)
Miltha meganosensis (FOSSIL) Clark & Woodford, 1927 †
Cryptolucina megayseides (FOSSIL) Saul, 1996 †
Fimbria mellingi J. Von Hauer, 1857
Schafhaeutlia mellingi (FOSSIL) (J. Von Hauer, 1857 †)
Schafhaeutlia mellingi japonica (FOSSIL) M. Ichikawa, 1950 †
Scabrilucina melvilli D.W. Taylor & E.A. Glover,2013
Phacoides menardi (FOSSIL) (G.P. Deshayes, 1825 †)
Gonimyrtea meneghinii (FOSSIL) (C. De Stefani& D. Pantanelli, 1880 †)
Miltha merangiana (FOSSIL) Martin, 1922 †
Lucina metablata (FOSSIL) A.E.M. Cossmann, 1901 †
Lucina metableta (FOSSIL) A.E.M. Cossmann, 1901 †
Ctena mexicana W.H. Dall, 1901
Stewartia micraulax (FOSSIL) Rossbach & Carter 1991 †