Leptinaria mamoreensis F.C. Baker, 1926 Brazil
Subulina manampetsaensis E. Fischer-Piette& A.M. Testud, 1964
Tortaxis mandarinus (L. Pfeiffer, 1855) China, Guangdong province19,3 mm
Subulina manempetsaensis J. Germain, 1964 Madagascar, Manampetsa18,9 mm
Homorus manueli H.B. Preston, 1910 Angola15 mm
Rhodea mariaalejandrae J. Grego, J. Steffek& A.P. Infante, 2007 Colombia34,7 mm
Opeas mariae (F.P. Jousseaume) Sri Lanka10,7 mm
Petriola marmorea (L.A. Reeve, 1850) Gabon, Sao Tomé Island
Lamellaxis martensi (L. Pfeiffer, 1856) Veracruz, Mexico
Lamellaxis martensiana (F.C. Baker, 1927) Venezuela
Bocageia massoni (J.C.H. Crosse, 1868) Gabon, Sao Tomé Island32,5 mm
Tortaxis matudai Y. Hirase, 1941 HuNan, China36 mm
Rumina maura (J.C.H. Crosse, 1873) Morocco, cap Cantin50 mm
Allopeas mauritianum (L. Pfeiffer, 1852) Hawaii8,9 mm
Allopeas mauritianum prestoni (E.R. Sykes, 1898) Nepal6,5 mm
Obeliscus maximus H.A. Pilsbry, 1906 Cuba
Obeliscus maximus princeps H.A. Pilsbry, 1906 Cuba32 mm
Chilonopsis melanoides T.V. Wollaston, 1878
Lamellaxis mexicanus (L. Pfeiffer, 1866) Veracruz, Mexico
Leptopeas micra (A.V.M.D. D'Orbigny,1835) Brazil, Ceara6,4 mm
Opeas micrae (A.V.M.D. D'Orbigny,1835)
Obeliscus microstoma (J. Gundlach in L. Pfeiffer, 1863) Cuba
Opeas minutum (FOSSIL) (Klein, 1853) †
Xerocerastus minutus A. Zilch, 1939 Namibia8 mm
Krapfiella mirabilis H.B. Preston, 1911 Malaysia
Tortaxis mirus (P.V. Gredler, 1884) China, Hen-San-Hsien20 mm
Lamellaxis mizius Er. Marcus & Ev. Marcus,1968 Brazil, Paranà
Lamellaxis monodon (C.B. Adams, 1849) Jamaica
Bocageia monticola (J.R. Bourguignat, 1880) Gabon, Sao Tomé Island21,3 mm
Subulina moreleti (A.A.A. Girard, 1893) Gabon, Principe Island20 mm
Rhodea moussoni A. Greco & Steffer, 2007 Colombia34 mm
Dysopeas muibum Er. Marcus & Ev. Marcus,1968 Brazil, Sao Paulo4 mm
Glessula mullorum (W.T. Blanford, 1861) India, Cuddalore
Prosopeas muongbuensis V.T. Do, 2014 Vietnam, Tonkin17,2 mm
Curvella myrmecophila B. Verdcourt, 2002