Hyalina moolenbeeki J. Espinosa & J.A. Ortea,2012
Volvarina mores J. Espinosa & J.A. Ortea,2006
Rivomarginella morrisoni R.A.M. Brandt, 1968
Volvarina morrocoyensis G.M. Caballer, J. Espinosa& J.A. Ortea, 2013
Marginella mosaica G.B. II Sowerby, 1846
Marginella mosterti S.G. Veldsman, R. Aiken& J.H. Veldsman, 2017
Glabella mozambicana F. Boyer, 2014
Ovaginella mumiformis (FOSSIL) Darragh, 2017 †
Marginella munda E.A. Smith, 1904
Marginella musacina (FOSSIL) A.A. Olsson, 1922 †
Austroginella muscaria (J.B.P.A. Lamarck, 1822)
Alaginella muscaroides (R. Tate, 1878)
Marginella musica R.B. Hinds, 1844
Hydroginella musorstomi F. Boyer, A. Wakefield& T. McCleery, 2003
Serrata mustelina (G.F. Angas, 1871)
Marginella mzimayiensis S.G. Veldsman, A. Aiken& J.H. Veldsman, 2015
Serrata nanna (FOSSIL) J. Gardner, 1937 †
Cryptospira nanoensis T. Habe, 1951
Tateshia naomiae H. Fukuda & S. Kosuge,2010
Glabella narica (FOSSIL) E.W. Vredenburg, 1925 †
Marginella natalcinerea W. Massier, 1993
Prunum nataliae G. Pérez-Dionis, J.A. Ortea& J. Espinosa, 2009
Volvarina nautica J. Espinosa & J.A. Ortea,2015
Dentimargo nauticus J. Espinosa, J.A. Ortea& L. Moro, 2012
Volvarina nealei A. Wakefield & T. McCleery,2004
Marginella nebulosa (P.F. Röding, 1798)
Marginella nebulosa abyssinebulosa W. Massier, 2004
Microspira nefertitae (FOSSIL) Abbass, 1967 †
Dentimargo neglecta (G.B. I Sowerby, 1846)
Prunum negoi T. Cossignani, 2005
Hyalina nelsyae G.M. Caballer, J. Espinosa& al., 2013
Volvarina nereidae J. Espinosa & J.A. Ortea,2013
Marginella nevillana R.N. Kilburn, 1977
Demissa nevilli (F.P. Jousseaume, 1875)
Granulina newmanae (FOSSIL) (B.C. Cotton, 1949 †)