Bathyptychia martensi H. Nordsieck, 2001
Montiphaedusa martensiana (H. Nordsieck, 1973) Nepal
Megalophaedusa martensii (E.C. Von Martens, 1860) Japan, Aichi34 mm
Megalophaedusa martensii concrescens (H.A. Pilsbry, 1908) Japan, Wakayama
Megalophaedusa martensii reiniana (W. Kobelt, 1875) Japan43 mm
Megalophaedusa martensii tinctilabris H.A. Pilsbry, 1902 Japan, Wakayama
Pseudidyla martingrossi (FOSSIL) M. Harzhauser& E.E. Binder, 2008 † Austria, Steiermark, Graz Umgebung
Reinia masaoi T. Habe, 1940 Japan, Tokushima13 mm
Megalophaedusa masatokandai H. Minato, 1978 Japan, Oita
Indonenia masoni (W. Theobald, 1864)
Clausilia massiei L.J. Morlet, 1892 Laos, Luang-Prabang41,9 mm
Phaedusa matejkoi Hunyadi & Szekeres, 2016
Clausilia matsusimai T. Habe, 1940 Japan
Clausilia matudai Y. Hirase, 1957 Japan
Albinaria mavromoustakisi R.A.M. Brandt, 1961 Cyprus
Euxina mazandaranica H. Nordsieck, 1994 Iran, Mazandaran21,8 mm
Hemiphaedusa media H. Nordsieck, 2005 China, Zizhixian20 mm
Carinigera megdova H. Nordsieck, 1974 Greece, Ipiros
Laminifera meini (FOSSIL) Truc, 1972 †
Cochlodina meisneriana (R.J. Shuttleworth, 1843) France, Corse Island17,8 mm
Cochlodina meisneriana adjaciensis (R.J. Shuttleworth, 1843) France, Corse Island17 mm
Lampedusa melitensis A. Caruana Gatto, 1892 Malta15,5 mm
Pyrostoma mellae (G. Stabile, 1864) France
Pyrostoma mellae leia J.R. Bourguignat, 1876 France
Pyrostoma mellae ripkeni G. Falkner, 2000 France
Albinaria menelaus (E.C. Von Martens, 1873) Greece, Peleponnesos15 mm
Elia menkhorsti E. Neubert, 1995 Turkey
Telophaedusa meroniana (P.M. Heude, 1888)
Alopia meschendorferi E.A. Bielz, 1858 Romania18 mm
Clausilia messageri A.R.J.B. Bavay& P. Dautzenberg, 1899 Vietnam, That Khé33,2 mm
Albinaria messenica E.C. Von Martens, 1876 Greece, Messenia15,2 mm
Serrulastra michaudi (FOSSIL) H. Nordsieck, 1981 †
Serrulina michelottii (FOSSIL) (Michaud, 1862) †
Phaedusa micropaviei H. Nordsieck, 2011
Mundiphaedusa micropeas (O.F. von Möllendorff,1882) Japan, Yokosuka