Pyruclia laevescens (FOSSIL) (R.J.L. Guppy, 1866 †)
Paladmete laevis (FOSSIL) N.F. Sohl, 1964 †
Scalptia laingensis A. Verhecken, 1989
Trigonostoma lamberti S.M. Souverbie, 1870
Brocchinia lamellifera (FOSSIL) P.A. Maxwell, 1992 †
Tritonoharpa lanceolata (K.T. Menke, 1828)
Microsveltia laratensis A. Verhecken, 2011
Trigonostoma laseroni (T. Iredale, 1936)
Inglisella laterinensis (FOSSIL) P.A. Maxwell, 1988 †
Merica laticosta (C.H.W.T. Löbbecke, 1881)
Aneurystoma laurensi (FOSSIL) (J.P.S. Grateloup,1832 † †)
Euclia laurettae R.E. Petit& M.G. Harasewych, 1998
Cancellaria lavellana (FOSSIL) F. Hodson, 1931 †
Tritonoharpa leali M.G. Harasewych, R.E. Petit& A. Verhecken, 1992
Mataxa leioderma (FOSSIL) N.F. Sohl, 1964 †
Cancellaria leonensis (FOSSIL) W.C. Mansfield, 1930 †
Trigonostoma leopoldinae (FOSSIL) R. Tournouer, 1876 †
Euclia leuzingeri (FOSSIL) R.F. Rutsch, 1934 †
Trigonostoma limatum (FOSSIL) M. Yokoyama, 1928 †
Loxotaphrus limpusi A.G. Beu & A. Verhecken,2000
Aphera lindae E.J. Petuch, 1987
Ventrilia lindae (FOSSIL) E.J. Petuch, 1994 †
Trigonostoma lindeni (FOSSIL) A.W. Janssen, 1984 †
Admete lischkei (FOSSIL) (M. Yokoyama †)
Cancellaria littoriniformis G.B. I Sowerby, 1832
Turehua lividorupis (FOSSIL) A.G. Beu & P.A. Maxwell,1987 †
Cancellaria longispirata (FOSSIL) M. Yokoyama, 1926 †
Massyla lopezana (FOSSIL) P.O. Jung & R.E. Petit,1990 †
Agatrix losquemadica (FOSSIL) P.O. Jung & R.E. Petit,1990 †
Tribia losquemadica (FOSSIL) C.J. Maury, 1917 †
Bivetiella lugogonzalezorum (FOSSIL) B.M. Landau & al., 2007 †
Mariasveltia lunata (FOSSIL) (T.A. Conrad, 1830 †)
Merica lussii R.E. Petit& M.G. Harasewych, 2000
Admetula lutea P. Bouchet & R.E. Petit,2008
Cancellaria lyrata A. Adams & L.A. Reeve,1850