Darioconus magnificus (L.A. Reeve, 1843)
Purpuriconus magnottei (E.J. Petuch, 1987)
Pionoconus magus (C. Linnaeus, 1758)
Ximeniconus mahogani (L.A. Reeve, 1843)
Africonus maioensis (H. Trovão, E. Rolán& V. Félix-Alves, 1990)
Virgiconus malabaricus E. Monnier, L. Limpalaër& M.J. Tenorio, 2017
Stellaconus malacanus (C.H. Hwassin J.G. Bruguière, 1792)
Kioconus malcolmi E. Monnier & L. Limpalaër,2015
Strategoconus maldivus (C.H. Hwassin J.G. Bruguière, 1792)
Conus mantovani (FOSSIL) Seguenza, 1880 †
Chelyconus manueltenorioi (FOSSIL) B.M. Landau, F. Da Silva& S.M. Heitz, 2016 †
Tenorioconus mappa (J. Lightfoot, 1786)
Tenorioconus mappa jesusramirezi (T. Cossignani, 2010)
Tenorioconus mappa trinitarius (C.H. Hwass, 1792)
Eugeniconus marchionatus (R.B. Hinds, 1843)
Conus marckeppensi (T. Cossignani& R. Fiadeiro, 2017)
Africonus marcocastellazzii T. Cossignani & R. Fiadeiro,2014
Conasprella marcusi (E.J. Petuch, D.P. Berschauer& Poremski, 2016)
Cryptoconus marginatus (FOSSIL) (J.B.P.A. Lamarck,1804 †)
Cryptoconus marginatus aequipartitus (FOSSIL) (A.E.M. Cossmann, 1889 †)
Cryptoconus marginatus bistriatus (FOSSIL) (G.P. Deshayes, 1834 †)
Chelyconus mariae (FOSSIL) Hoernes & Auinger, 1879 †
Poremskiconus mariaodeteae E.J. Petuch & B.W. Myers,2014
Profundiconus maribelae M.J. Tenorio & Castelin,2016
Fulgiconus marielae (H.A. Rehder & B.R. Wilson,1975)
Attenuiconus marileeae M.G. Harasewych, 2014
Conasprella marinae (E.J. Petuch & B.W. Myers,2014)
Conus marmoratus J.S. Schröter, 1803
Conus marmoratus H.S. Holten, 1802
Conus marmoreus C. Linnaeus, 1758
Conus marmoreus crosseanus M. Bernardi, 1861
Conus marmoreus crosseanus batarde Prigent, 1973
Kioconus martensi (E.A. Smith, 1884)
Conus marticensis (FOSSIL) Matheron, 1843 †
Phasmoconus martini (FOSSIL) Shuto, 1969 †