Pyrgula lirata (W. Dybowski& J.G. Grochmalicki, 1915)
Turricaspia lirata (W. Dybowski& J.G. Grochmalicki, 1915)
Caspiohydrobia ljaurica Y.I. Starobogatov& Z.I. Izzatullaev, 1974
Zeteana ljiljanae P. Glöer & V.M. Pešic,2014
Horatia ljovuschkini Y.I. Starobogatov, 1962
Pseudocaspia ljovuschkini Y.I. Starobogatov, 1972
Pseudamnicola lobostoma (FOSSIL) H. Schütt in H. Schütt& Besenecker, 1973 †
Austropyrgus lochi A. Clark, W.B. Miller& W.F. Ponder, 2003
Pyrgulopsis lockensis R. Hershler, 1998
Micromelania loczyi (FOSSIL) Lörenthey, 1894 †
Beddomeia lodderae W.F. Petterd, 1889
Caspia logvinenkoi (A.N. Golikov& Y.I. Starobogatov, 1966)
Belgrandiella lomica D.G. Georgiev & P. Glöer,2015
Pyrgulopsis longae R. Hershler, 1995
Hydrobia longaeva (FOSSIL) M. von Neumayr, 1875 †
Pyrgulopsis longiglans R. Hershler, 1998
Pyrgulopsis longinqua (A.A. Gould, 1855)
Texapyrgus longleyi F.G. Thompson & R. Hershler,1991
Daphniola louisi A. Falniowski& M. Szarowska, 2000
Vioscalba louisianae J.P.E. Morrison, 1965
Belgrandiella lucensis (E. Rolán, 1992)
Hauffenia lucidula (A.M. Angelov, 1967)
Tournouerina lugdunensis (FOSSIL) (J.R. Tournouër, 1879 †)
Corrosella luisi H.D. Boeters, 1984
Plagigeyeria lukai P. Glöer & V.M. Pešic,2014
Alzoniella lunensis M. Bodon & S. Cianfanelli,2002
Belgrandia lusitanica (A. Paladilhe, 1867)
Marstonia lustrica (H.A. Pilsbry, 1890)
Pseudamnicola luteola (H.C. Küster, 1862)
Hydrobia luvilana G. Mandahl-Barth, 1973
Iglica luxurians (L. Kušcer, 1932)
Staja lycica (FOSSIL) (P. Oppenheim, 1919 †)
Belgrandiella maarensis D.G. Georgiev, 2013
Iglica maasseni H. Schütt, 1980
Hydrobia mabillei (J.R. Bourguignat, 1876)