Alvania miocrassicosta (FOSSIL) (F. Sacco, 1895 †)
Manzonia miocristata (FOSSIL) F. Sacco, 1895 †
Rissoa mirabilis A. Manzoni, 1868
Onoba mirifica A. Adams, 1853
Pusillina misera (FOSSIL) (G.P. Deshayes, 1861 †)
Haurakia mixta (FOSSIL) Finlay, 1924 †
Pusillina mobilicosta (W.F. Ponder, 1967)
Alvania moerchi (A.E. Collin, 1886)
Mohrensternia moesinensis (FOSSIL) E. Jekelius, 1944 †
Ihungia moniliata (FOSSIL) J. Marwick, 1965 †
Alvania moniziana (R.B. Watson, 1873)
Rissoa monodonta R.A. Philippi, 1836
Alvania monserratensis F.C. Baker, G.D. Hanna& A.M. Strong, 1930
Cingula montereyensis P. Bartsch, 1912
Alvania monterosatoi (P. Fischer, 1877)
Alvania moolenbeeki D. De Jong & H.E. Coomans,1988
Pseudosetia morana (FOSSIL) (H.S. Ladd, 1966 †)
Rissoa moreana (FOSSIL) Buvignier, 1852 †
Onoba moreleti P. Dautzenberg, 1889
Crisilla morenoi J. Templado & E. Rolán,1994
Rissoa moreyensis (FOSSIL) A.E.M. Cossmann, 1885 †
Onoba morioria (A.W.B. Powell, 1933)
Rissoa mortoni J.D. Kurtz, 1860
Rissoa mosensis (FOSSIL) Buvignier, 1852 †
Rissoa mucronata (FOSSIL) Svagrovský, 1971 †
Thaleia mucronetincta (K.H.J. Thiele, 1925)
Rissoa multicincta C. Smriglio & P. Mariottini,1995
Benthonellania multicostata R.S. Absalão & F.N. Santos,2004
Rissoa multicostata (F. Nordsieck& F.F. Talavera, 1979)
Onoba multilirata (W.L. May, 1915)
Alvania multinodula H.J. Hoenselaar & J. Goud,1998
Alvania multiquadrata J. van der Linden& W.M. Wagner, 1989
Pusillina munda (T.A. de M. Monterosato,1884)
Lucidestea mundula (A. Adams, 1860)
Rissoa munieri (FOSSIL) Szöts, 1953 †