Perotrochus lucaya F.M. Bayer, 1965 Bahamas46 mm
Pleurotomaria lycetti (FOSSIL) d'Orbigny † UK, England, Gloucestershire
Leptomaria macilenta (FOSSIL) Cragin, 1893 † Texas, Tarrant County
Talantodiscus mackayi (FOSSIL) Begg & J. Grant-Mackie,2003 † Costa Rica, Limón
Pyrgotrochus macrocephalus (FOSSIL) (F.A. von Quenstedt,1858 †) Poland, Balin66 mm
Leptomaria magneti (FOSSIL) M. Collignon, 1949 † Madagascar, Mahajanga, Boeny
Conotomaria maileana (FOSSIL) (A.V.M.D. D'Orbigny,1843 †)
Bathrotomaria mandokii (FOSSIL) J. Szabo, 1980 † Hungary, Veszprém
Pleurotomaria mariani (FOSSIL) C. Gemmellaro, 1889 † Italy, Sicily, Palermo
Murihikua marwicki (FOSSIL) Begg & J. Grant-Mackie,2003 † New Zealand, Waikato, Waitomo
Bayerotrochus masoni (FOSSIL) (P.A. Maxwell, 1978 †)
Perotrochus maureri M.G. Harasewych& T.M. Askew, 1993 Florida, Jacksonville42 mm
Pleurotomaria mazarensis (FOSSIL) C. Gemmellaro, 1889 † Italy, Sicily, Palermo
Pleurotomaria mendipensis (FOSSIL) Moore † UK, England, Somerset
Perotrochus metivieri P. Anseeuw & Y. Goto,1995 Mascarenes Islands, Saya de Malha Bank
Pleurotomaria mica (FOSSIL) Girty, 1909 † USA, Texas, Culberson
Bayerotrochus midas (F.M. Bayer, 1965) Bahamas87 mm
Ornatospira mirifira (FOSSIL) Pan, 1982 † China, Sichuan, Mianyang
Cyclostomaria monarii (FOSSIL) J. Szabo, 2008 † Hungary, Veszprém
Obornella monilifera (FOSSIL) (Terquem & Jourdy,1873 †) Poland, Balin21 mm
Pleurotomaria monilifera (FOSSIL) White, 1880 † Romania, Brasov
Pleurotomaria monticuloides (FOSSIL) Hudleston † UK, England, Somerset
Pleurotomaria morrisi (FOSSIL) d'Orbigny † UK, England, Gloucestershire
Pleurotomaria multicincta (FOSSIL) Zieten, 1832 † UK, England, Dorset
Discotoma multipleura (FOSSIL) Pan, 1977 † China, Yunnan, Pu'er
Pleurotomaria murchisoniaeformis (FOSSIL) C. Gemmellaro, 1889 † Italy, Sicily, Palermo
Pleurotomaria neglecta (FOSSIL) Girty, 1909 † USA, Texas, Culberson
Pleurotomaria neosolodurina (FOSSIL) Dacque, 1905 † Ethiopia, Oromia, Misraq Harerge
Plocostoma neumayri (FOSSIL) C. Gemmellaro, 1889 † Italy, Sicily, Palermo
Leptomaria nicsimoni (FOSSIL) Monari & Gatto, 2014 † Luxembourg
Pleurotomaria nikitini (FOSSIL) Fliegel, 1901 † Indonesia, Padang Highlands
Sisenna ninglangensis (FOSSIL) Pan, 1977 † China, Yunnan, Lijiang
Sisenna novoguineana (FOSSIL) Skwarko, 1973 † Papua New Guinea, Madang, Middle Ramu
Pleurotomaria nuda (FOSSIL) Delpey, 1941 † Cambodia, Kâmpôt
Neoplatyteichum numerosum (FOSSIL) C.O. Waterhouse, 1983 † Australia, Queensland, Bowen