Peringia mabilli J.R. Bourguignat, 1876
Austropyrgus macaulayi A. Clark, W.B. Miller& W.F. Ponder, 2003
Mercuria maceana (A. Paladilhe, 1869)
Austropyrgus macedonensis A. Clark, W.B. Miller& W.F. Ponder, 2003
Graecoanatolica macedonica P. Radoman & S. Stankovic,1979
Horatia macedonica (L. Kušcer, 1937)
Ohridopyrgula macedonica (Š. Brusina, 1896)
Sumia macedonica P. Glöer & Mrkvicka, 2015
Austropyrgus macropus A. Clark, W.B. Miller& W.F. Ponder, 2003
Pseudamnicola macrostoma (H.C. Küster, 1852)
Alzoniella macrostoma M. Bodon & S. Cianfanelli,2002
Insignia macrostoma A.M. Angelov, 1972
Staja maeotica (FOSSIL) (Iljina, 1976 †)
Caspia maeotidiaeformis (FOSSIL) Roshka, 1973 †
Daphniola magdalenae A. Falniowski, 2015
Pseudamnicola magdalenae A. Falniowski, 2016
Caspia magna (FOSSIL) Pana, 2003 †
Sulawesidrobia mahalonaensis S. Zielske, M. Glaubrecht& M. Haase, 2011
Marticia makarii (FOSSIL) P.S. Pavlovic, 1932 †
Caspia makarovi (A.N. Golikov& Y.I. Starobogatov, 1966)
Nematurella makowskyi (FOSSIL) (Rzehak, 1893 †)
Turricaspia malandzii (FOSSIL) V.V. Anistratenko& Gozhik, 1995 †
Pyrgula malcevici (FOSSIL) Š. Brusina, 1893 †
Fluviopupa malekulana S. Zielske & M. Haase,2014
Pseudamnicola malickyi H. Schütt, 1980
Parateinostoma mana (FOSSIL) (L. von G. Tausch,1886 †)
Pyrgulopsis manantiali (R. Hershler, 1985)
Hauffenia mandici (FOSSIL) T.A. Neubauer& M. Harzhauser in M. Harzhauser & al., 2014 †
Devetakia mandrica D.G. Georgiev, 2012
Alzoniella manganellii M. Bodon, S. Cianfanelli& E. Talenti, 1997
Corrosella manueli (D. Delicado, Machordom& M.A. Ramos, 2012)
Pseudamnicola marashi P. Glöer, M.E. Gürlek& C. Kara, 2014
Pyrgulopsis marcida R. Hershler, 1998
Antillobia margalefi C.R. Altaba, 1993
Pseudamnicola margarita (FOSSIL) (M. von Neumayr in Herbich& M. von Neumayr, 1875 †)