Tessarolax louellae (FOSSIL) R.L. Squires in Saul& R.L. Squires, 2015 †
Arrhoges machaerophorus (FOSSIL) Pethö, 1906 †
Arrhoges macheli (FOSSIL) Gliozzi & Malatesta,1983 †
Cultrigera macrostoma (FOSSIL) (Sowerby in Fitton,1836 †)
Struthiochenopus magellanicus (FOSSIL) (H.F.A. von Ihering,1909 †)
Pietteia mandawaensis (FOSSIL) Cox, 1965 †
Perissoptera marginata (FOSSIL) (Sowerby in Fitton,1836 †)
Ceratosiphon marginatus (FOSSIL) (A.V.M.D. D'Orbigny,1843 †)
Drepanocheilus marocanus (FOSSIL) G.F. Roch†
Pterocerella maryea (FOSSIL) D.T. Dockery, 1993 †
Diarthema mattheyi (FOSSIL) (De Loriol, 1889 †)
Perissoptera megaloptera (FOSSIL) (A.E. Reuss, 1844 †)
Aporrhais megapolitana (FOSSIL) A.H.E. Beyrich, 1854 †
Goniocheila menthafontis (FOSSIL) (F.S. MacNeil, 1984 †)
Aporrhais meridionalis (FOSSIL) B. de Basterot, 1825 †
Aporrhais meridionalis taurinensis (FOSSIL) F. Sacco, 1893 †
Cuphosolenus mexicanus (FOSSIL) (Kellum & Appelt, 1964 †)
Mexopus mexicanus (FOSSIL) S. Kiel& del Carmen Perrilliat, 2001 †
Disoketa meyeri (FOSSIL) Gardner, 1880 †
Trietteia mipa (FOSSIL) (A. De Gregorio, 1886 †)
Triacontium mirandus (FOSSIL) (A.E.M. Cossmann, 1922 †)
Cuphosolenus moisseievi (FOSSIL) Pchelincev, 1927 †
Arrhoges montensis (FOSSIL) Vincent, 1930 †
Ceratosiphon moreausianus (FOSSIL) (A.V.M.D. D'Orbigny,1843 †)
Quadrinervus mosensis (FOSSIL) (Buvignier, 1852 †)
Pterocerella mossoroensis (FOSSIL) Beurlen, 1964 †
Ueckeritzella mothsi (FOSSIL) J. Gründel, 1998 †
Latiala mountnorrisi (FOSSIL) (Skwarko, 1983 †)
Drepanocheilus mudgeana (FOSSIL) White, 1878 †
Dimorphosoma muleti (FOSSIL) (A.V.M.D. D'Orbigny,1850 †)
Diarthema munsterianum (FOSSIL) (A.V.M.D. D'Orbigny,1850 †)
Quadrinervus muscus (FOSSIL) (Eudes-Deslongchamps,1843 †)
Myurusina myurus (FOSSIL) (Eudes-Deslongchamps,1843 †)
Cultrigera nagorzanyensis (FOSSIL) (J. Favre, 1869 †)
Auriala nairica (FOSSIL) Hacobjan, 1976 †