Leucosyrinx mawsoni A.W.B. Powell, 1958
Crassispira mayaguanaensis P.J. Fallon, 2011
Crassispira mekranica (FOSSIL) E.W. Vredenburg, 1925 †
Pilsbryspira melchersi (K.T. Menke, 1852)
Comitas melvilli (M.M. Schepman, 1913)
Miraclathurella mendozana D.R. Shasky, 1971
Crassispira mennoi D. De Jong & H.E. Coomans,1988
Thelecytharella metuloides (R.N. Kilburn, 1995)
Crassispira meunieri (FOSSIL) (C.J. Maury, 1910 †)
Tripia microcheila (FOSSIL) F.E. Edwards †
Crassispira microstoma E.A. Smith, 1882
Hindsiclava militaris (R.B. Hinds,in L.A. Reeve, 1843)
Cheungbeia mindanensis (E.A. Smith, 1877)
Crassispira mindegyiensi (FOSSIL) E.W. Vredenburg, 1921 †
Inquisitor minimarus S. Kosuge, 1993
Inquisitor minutosternalis S. Kosuge, 1993
Inquisitor mirabelflorenti T. Cossignani, 2016
Otitoma mitra (R.N. Kilburn, 1986)
Naudedrillia mitromorpha R.N. Kilburn, 1988
Comitas miyazakiensis T. Shuto, 1961
Pseudomelatoma moesta (P.P. Carpenter, 1864)
Lioglyphostoma moinica (FOSSIL) (A.A. Olsson, 1922 †)
Crassispira monilecosta F. Fernandes, E. Rolán& J. Otero-Schmidt, 1995
Crassispira monilifera (P.P. Carpenter, 1857)
Crassispira monilis (P. Bartsch & H.A. Rehder,1939)
Crassispira montereyensis (R.E.C. Stearns, 1871)
Antiplanes motojimai (T. Habe, 1958)
Crassispira multicostata P.J. Fallon, 2011
Inquisitor multilirata (E.A. Smith, 1877)
Epidirona multiseriata (E.A. Smith, 1877)
Comitas murrawolga (T.A. Garrard, 1961)
Crassispira myaukmigonensis (FOSSIL) E.W. Vredenburg, 1921 †
Compsodrillia nakamurai J. Makiyama, 1931
Comitas nana (FOSSIL) P.A. Maxwell, 1988 †
Compsodrillia nana P. Bartsch, 1934