Pleurifera lepida K. Monsecour & D. Monsecour,2016
Paxula leptalea (H.H. Suter, 1908)
Pyreneola leptalea (E.A. Smith, 1902)
Costoanachis leroyi (FOSSIL) F.S. MacNeil, 1960 †
Strombina lessepsiana (FOSSIL) J. Brown & H.A. Pilsbry,1911 †
Ascalista letourneuxi K. Monsecour & D. Monsecour,2015
Mitrella leucostoma (J.S. Gaskoin, 1851)
Columbella levania P.L. Duclos, 1848
Zafrona lightfooti (E.A. Smith, 1901)
Graphicomassa ligula (P.L. Duclos, 1840)
Strombina lilacina W.H. Dall, 1916
Anachis lillianae A. Whitney, 1978
Mitrella limonensis (FOSSIL) W.M. Gabb, 1881 †
Anachis limula K. Monsecour & D. Monsecour,2016
Mitrella lincolnensis (L.A. Reeve, 1859)
Parametaria lindae (FOSSIL) E.J. Petuch, 1986 †
Cotonopsis lindae (E.J. Petuch, 1989)
Zafrona lindae E.J. Petuch, 1992
Columbella linigera J.C. Chenu, 1846
Columbella liratula W.H. Turton, 1932
Mitrella lischkei (E.A. Smith, 1879)
Strombina lissa (FOSSIL) Gardner, 1947 †
Euplica livescens (L.A. Reeve, 1859)
Mitrella llajasensis R.L. Squires, 2015
Mitrella loisae W.D. Pitt & R. Kohl, 1979
Euplica loisae H.A. Rehder, 1980
Mitrella longispira (FOSSIL) B.M. Landau, F. Da Silva& S.M. Heitz, 2016 †
Mitrella longissima D. Monsecour & D. Monsecour,2007
Dominitaria lopezana (FOSSIL) P.O. Jung, 1994 †
Mitrella lorenzi D. Monsecour & D. Monsecour,2014
Mitrella loyaltyensis (R.P.J. Hervier, 1899)
Pyreneola lozoueti J. Drivas & M. Jay, 1997
Pyreneola lukenederi (FOSSIL) M. Harzhauser, 2014 †
Astyris lunata (T. Say, 1826)
Pyreneola lurida (C. Hedley, 1907)