Poecilocoptis lagunillensis (H.A. Pilsbry, 1903) Cuba
Tetrentodon lajasensis C. de la Torre& P. Bartsch, 1972 Cuba
Torrecoptis lajoncheri (R. Arango, 1884) Cuba
Tenuistemma lateralis (Paz in L. Pfeiffer,1860) Cuba21,8 mm
Strophina laterradii (J.P.S. Grateloup, 1840) Dominican Republic9 mm
Microceramus latus (J. Gundlach in L. Pfeiffer, 1863) Cuba8 mm
Ventricochis laureani C. de la Torre& P. Bartsch, 1972 Cuba
Microceramus laureanus C. de la Torre& P. Bartsch, 1972 Cuba
Tomelasmus lavalleanus (A.V.M.D. D'Orbigny,1842) Cuba
Nesocoptis leoni C. de la Torre& P. Bartsch, 1972 Cuba
Microceramus leptus C. de la Torre& P. Bartsch, 1972 Cuba
Tetrentodon lermondi C. de la Torre& P. Bartsch, 1972 Cuba
Brachypodella lescallei C. de la Torre& P. Bartsch, 1972 Cuba
Brachypodella leucopleura (K.T. Menke, 1847) Venezuela11 mm
Coelostemma leucostoma F.G. Thompson, 1971 Mexico, Cuernavaca
Anoma levis C.B. Adams, 1851 Jamaica
Brachypodella libanoensis C. de la Torre& P. Bartsch, 1972 Cuba
Coelostemma lichenophora (P. Bartsch, 1906) Hidalgo, Mexico
Anisospira liebmanni (L. Pfeiffer, 1846) Oaxaca, Mexico
Tetrentodon limonarensis C. de la Torre& P. Bartsch, 1972 Cuba
Macroceramus lineatus (J.G. Bruguière, 1789) Haiti
Gongylostoma lirata (Jimeno in L. Pfeiffer,1864) Cuba
Coelostemma lissocentrum H.A. Pilsbry, 1953 Mexico, San Luis Potosì14,1 mm
Poeycoptis lituus (A.A. Gould, 1842) Cuba
Torrecoptis livida (C. de la Torre, 1912) Cuba14,9 mm
Macroceramus loeryi E.R. Jacobson, 1955
Torrecoptis longa (H.A. Pilsbry& J. Henderson, 1913) Cuba
Johaniceramus longus (J. Henderson, 1915) Cuba
Gongylostoma lowei (C. de la Torre, 1927) Cuba17 mm
Pfeiffericoptis lucens (B.H. Wright in G.B. Sowerby, 1875) Cuba
Cylindrella ludersi L. Pfeiffer, 1859 Mexico
Macroceramus ludovici (L. Pfeiffer, 1853) Dominican Republic22 mm
Hendersoniella lux F.G. Thompson& L.R. Correa-Sandoval, 1994 Mexico, San Luis Potosì
Pfeiffericoptis machoi (R. Arango, 1876) Cuba
Poecilocoptis macra (B.H. Wright in L. Pfeiffer, 1867) Cuba