Melliteryx jaeckeli M. Huber, 2015
Arthritica japonica C.F. Lützen & G. Takahashi,2003
Diarmaidia jingchunae E.V. Coan& P.H. Valentich-Scott, 2012
Neaeromya jipijapa (A.A. Olsson, 1961)
Erycina johnjagti (FOSSIL) R. Marquet, Lenaerts& Laporte, 2012 †
Kelliopsis jozinae J.J. Van Aartsen& F. Carrozza, 1998
Borniola kaawaensis (FOSSIL) J.A. Bartrum& A.W.B. Powell, 1928 †
Macrodiceras kozlowskii (FOSSIL) Karczewski, 1969 †
Lepton lacerum J.G. Jeffreys, 1873
Erycina lamarckiana (FOSSIL) Recluz, 1844 †
Erycina latens (FOSSIL) G.P. Deshayes, 1858 †
Aligena laterodentata H.W. Harry, J.C.Jr. Britton& Nunley, 1980
Borniola lepida (C. Hedley, 1906)
Lepton lepidum T. Say, 1826
Erycina liancurtensis (FOSSIL) A.E.M. Cossmann, 1896 †
Orobitella limpida (W.H. Dall, 1899)
Erycina linella W.H. Dall, 1899
Erycina longidentata (FOSSIL) G.P. Deshayes, 1858 †
Hemilepton longifossulum (FOSSIL) (A.E.M. Cossmann, 1896 †)
Ceratobornia longipes (W. Stimpson, 1855)
Macrodiceras longum (FOSSIL) Karczewski, 1969 †
Melliteryx mactroides (S.C.T. Hanley, 1857)
Macrodiceras magnum (FOSSIL) Karczewski, 1969 †
Boreacola maltzani (T.A. Verkrüzen, 1875)
Lasaea maoria (A.W.B. Powell, 1933)
Neaeromya margarita (A.A. Olsson, 1961)
Properycina mariana (FOSSIL) Cerulli-Irelli 1908 †
Erycina marylandica (FOSSIL) L.C. Glenn, 1904 †
Paraborniola matsumotoi T. Habe, 1958
Scacchia maura J. van der Linden, 1996
Amerycina mikkelsenae P.H. Valentich-Scott,2012
Lasaea miliaris R.A. Philippi, 1845
Squillaconcha minoensis (FOSSIL) (Itoigawa 1960) †
Semeloidea miocenica (FOSSIL) C.R. Laws, 1932 †
Melliteryx mirifica (FOSSIL) Powell & J.A. Bartrum,1929 †