Leptoconus martinicensis (FOSSIL) Cossmann, 1913 †
Conus martinshugari (FOSSIL) E.J. Petuch, 1994 †
Conus marylandicus (FOSSIL) J. Green, 1830 †
Conus marymansfeldae (FOSSIL) E.J. Petuch, 1994 †
Conus marymansfieldae (FOSSIL) E.J. Petuch, 1994 †
Leptoconus masasensis (FOSSIL) Marks, 1951 †
Conasprella masinoi (E.J. Petuch, D.P. Berschauer& Poremski, 2016)
Dauciconus massemini (E. Monnier & L. Limpalaër,2016)
Conus maureenae (FOSSIL) E.J. Petuch, 1994 †
Conus maussieri (FOSSIL) A.E.M. Cossmann, 1923 †
Dauciconus maya (E.J. Petuch& D.M. Sargent, 2011)
Conasprella mazei (G.P. Deshayes, 1874)
Harmoniconus mcbridei (F.Jr. Lorenz, 2005)
Conasprella mcgintyi (H.A. Pilsbry, 1955)
Leptoconus medialira (FOSSIL) E.H. Vokes, 1938 †
Dendroconus medoci F.Jr. Lorenz, 2004
Dendroconus medoci armeniaca (L. Bozzetti, 2009)
Varioconus medvedevi A. Monteiro, C.M.L. Afonso& al., 2014
Africonus melissae (M.J. Tenorio, C.M.L. Afonso& E. Rolán, 2008)
Cryptoconus mellevillei (FOSSIL) J.K. Tucker & Renard,1993 †
Quasiconus melvilli (G.B. III Sowerby, 1879)
Conasprella memiae T. Habe & S. Kosuge, 1970
Conus menengtenganus (FOSSIL) Martin, 1895 †
Conus menkrawitensis (FOSSIL) Beets, 1941 †
Conus mercati (FOSSIL) G.B. Brocchi, 1814 †
Conus mercati austriacus (FOSSIL) R. Hoernes & M. Auinger,1882 †
Lautoconus mercator (C. Linnaeus, 1758)
Lautoconus mercator cacao (M. Ferrario, 1983)
Africonus messiasi (E. Rolán & F. Fernandes,1990)
Conus miamiensis (FOSSIL) E.J. Petuch, 1986 †
Conus micanopy (FOSSIL) E.J. Petuch, 1994 †
Pygmaeconus micarius (C. Hedley, 1912)
Conus miccosukee (FOSSIL) Abbott, 1988 †
Varioconus micropunctatus E. Rolán & D. Röckel,2000
Africonus miguelfiaderoi T. Cossignani & R. Fiadeiro,2015