Ihungia luteophila (FOSSIL) J. Marwick, 1931 †
Merelina lyalliana (H.H. Suter, 1898)
Alvania macandrewi (A. Manzoni, 1868)
Alvania macandrewi spreta (R.B. Watson, 1873)
Alvania macella S. Gofas, 2007
Obtusella macilenta (T.A. de M. Monterosato,1880)
Alvania maclurgi (A.W.B. Powell, 1933)
Onoba macra (R.B. Watson, 1886)
Setia maculata (T.A. de M. Monterosato,1869)
Setia maculata trapani T.A. de M. Monterosato,1869
Manzonia madeirensis R.G. Moolenbeek& M.J. Faber, 1987
Obtusella magna (J.H. Gatliff& C.J. Gabriel, 1911)
Alvania mamillata A. Risso, 1826
Attenuata manawatawhia (A.W.B. Powell, 1937)
Manzonia manzoniana (E. Rolán, 1987)
Merelina maoriana A.W.B. Powell, 1939
Alvania marchadi S. Gofas, 1999
Benthonella margaritifera (R.B. Watson, 1886)
Pusillina marginata (A. Michaud, 1830)
Pusillina marginata margiminia F. Nordsieck, 1972
Alvania mariae (FOSSIL) (A.V.M.D. D'Orbigny,1852 †)
Alvania marioi S. Gofas, 1999
Crisilla marioni (G. Fasulo & A. Gaglini,1987)
Alvania marmarisensis Bitlis & Öztürk, 2017
Haurakia marmorata (C. Hedley, 1907)
Pusillina marshalli (FOSSIL) (J. Grant-Mackie& M. Chapman-Smith, 1971 †)
Manzonia martinsi S.P. Ávila & J. Cordeiro,2014
Boreocingula martyni (W.H. Dall, 1886)
Onoba marylandica (FOSSIL) Martin, 1904 †
Lironoba matai R.K. Dell, 1952
Cingula matusimana S. Nomura, 1940
Simulamerelina mauritiana (E.C. Von Martens, 1880)
Alvania maximilicutiani D. Scuderi, 2014
Rissoa maya (M. Yokoyama, 1926)
Haurakia mediolaevis B.C. Cotton, 1944