Discula lyelliana R.T. Lowe, 1852
Monacha maasseni B. Hausdorf, 2003
Helicella macedonica P. Hesse, 1928
Ochtephila madeirensis (W. Wood, 1828)
Ochtephila madeirensis taeniata (P.B. Webb & S. Berthelot,1833)
Xerotricha madritensis (J.P. Rambur, 1868)
Monacha magna B. Hausdorf, 2000
Harmozica maiae (V. Hüdec & G.I. Lezhawa,1969)
Kokotschashvilia makvalae (V. Hüdec & G.I. Lezhawa,1969)
Monacha margarita B. Hausdorf, 2000
Xerotricha mariae (L. Gasull, 1974)
Candidula marocana J. Ahuir Galindo, 2014
Xerosecta marteli (P.M. Pallary, 1920)
Monacha martensiana N. Tiberi, 1869
Ponentina martigena (A.E.J. Férussac, 1832)
Trichia martorelli J.R. Bourguignat, 1870
Helicopsis martynovi N. Gural-Sverlova, 2010
Hiltrudia mathildae (C.A. Westerlund, 1881)
Trichia matorelli (J.R. Bourguignat, 1878)
Xerosecta mauretanica (J.R. Bourguignat, 1880)
Candidula mayeri (G.P.L.K. Gude, 1914)
Trochoidea meda (C. Porro, 1840)
Leuchrochroa melillensis (P.M. Pallary, 1898)
Monacha melitenensis P. Hesse, 1915
Leptaxis membranacea R.T. Lowe, 1852
Trichia memnonis R. Sturany, 1904
Caucasocressa menkhorsti B. Hausdorf, 2003
Monacha menkhorsti B. Hausdorf, 2000
Monacha merssinae A. Mousson, 1874
Leucozonella mesoleuca (E.C. Von Martens, 1882)
Xeropicta mesopotamica (A. Mousson, 1874)
Xerocrassa mesostena (C.A. Westerlund, 1879)
Monacha messenica (C.A. Westerlund& H. Blanc, 1879)
Leucozonella mica (N.L. Tzvetkova, 1950)
Lemniscia michaudi (G.P. Deshayes, 1830)