Tritonoturris macandrewi (E.A. Smith, 1882)
Lusitanops macrapex P. Bouchet & A. Warén,1980
Raphitoma maculosa T. Høisæter, 2016
Daphnella magnifica P. Stahlschmidt, G.T. Poppe& M. Chino, 2014
Pleurotomella maitasi W. Engl, 2008
Phymorhynchus major A. Warén & P. Bouchet,2001
Xanthodaphne maldivica A.V. Sysoev, 1996
Hemilienardia malleti (C.A. Récluz, 1852)
Mioawateria malmii (W.H. Dall, 1889)
Xanthodaphne maoria R.K. Dell, 1956
Daphnella margaretae W.G. Lyons, 1972
Daphnella marmorata R.B. Hinds, 1844
Nepotilla marmorata (J.C. Verco, 1909)
Pleurotomella marshalli (E.R. Sykes, 1906)
Pseudodaphnella martensi (G. Nevill & H. Nevill,1875)
Buccinaria martini (E.J. Koperberg, 1931)
Leiosyrinx matsukumai P. Bouchet & A.V. Sysoev,2001
Paramontana mayana (C. Hedley, 1922)
Taranis mayi (J.C. Verco, 1909)
Daphnella mazatlanica H.A. Pilsbry & H.N. Lowe,1932
Eubela mcgintyi J.S. Schwengel, 1943
Azorilla megalembryon (P. Dautzenberg& H. Fischer, 1896)
Kermia melanoxytum (R.P.J. Hervier, 1896)
Xanthodaphne membranacea (R.B. Watson, 1886)
Tritonoturris menecharmes (J.C. Melvill, 1923)
Pleurotomella meriacum É.A.A. Locard, 1896
Daphnella metcalfiana (L.A. Reeve, 1845)
Thesbia michaelseni (H. Strebel, 1905)
Raphitoma michaudi (FOSSIL) (L.M.D. Bellardi, 1877 †)
Gymnobela micraulax A.V. Sysoev, 1997
Hemilienardia micronesialba Wiedrick, 2017
Nepotilla microscopica (W.L. May, 1916)
Gymnobela midpacifica P. Stahlschmidt & M. Chino,2012
Hemilienardia mikesevernsi Wiedrick, 2017
Daphnella millegrana A. Garrett, 1873