Bythiospeum josianae Callot-Girardi, Wienin, Girardi& Racamond, 2017
Bythiospeum juliae D.G. Georgiev & P. Glöer,2015
Austropyrgus juliae A. Clark, W.B. Miller& W.F. Ponder, 2003
Alzoniella junqua H.D. Boeters, 2000
Pseudamnicola jurassica (FOSSIL) Yu, 1974 †
Nematurella kadimai (FOSSIL) Š. Brusina, 1902 †
Pseudocaspia kainarensis Y.I. Starobogatov, 1972
Rhodopyrgula kamirensis (FOSSIL) Willmann, 1981 †
Iglica kanalitensis A. Reischütz, N. Reischütz& P.L. Reischütz, 2016
Iglica karamani (L. Kušcer, 1935)
Lyhnidia karamani S. Hadžišce, 1959
Kerkia kareli Beran, M. Bodon& S. Cianfanelli, 2014
Ohrigocea karevi S. Hadžišce, 1959
Caspia katlabuhensis (FOSSIL) Roshka, 1973 †
Saganoa kawanensis O. Masuda & T. Habe, 1984
Pseudamnicola kayseriensis P. Glöer, M.Z. Yildirim& Ü. Kebapçi, 2015
Caspiohydrobia kazakhstanica Y.I. Starobogatov& S.I. Andreeva, 1981
Pontohydrobia kelterborni (FOSSIL) (W.A. Wenz in Krejci& W.A. Wenz, 1927 †)
Trichonia kephalovrissonia Radoman, 1973
Pseudamnicola kerchensis (FOSSIL) Iljina in Iljina & al.,1976 †
Intermaria kermanshahensis (P. Glöer & V.M. Pešic,2009)
Hauffenia kerschneri (S. Zimmermann, 1930)
Beddomeia kershawi W.F. Ponder & K.B. Clark,1993
Fluviopupa kessneri W.F. Ponder & M. Shea,2014
Beddomeia kessneri W.F. Ponder & K.B. Clark,1993
Kaskakia khorrasanensis P. Glöer & V.M. Pešic,2012
Akiyoshia kishiiana J.T. Kuroda,T. Habe & Tamu, 1958
Hauffenia kissdalmae Z. Eröss & E. Petró, 2008
Belgrandiella klagenfurtensis M. Haase, 1994
Gyromelania klaici (FOSSIL) (Š. Brusina, 1897 †)
Horatia klecakiana J.R. Bourguignat
Iglica kleinzellensis P.L. Reischütz, 1981
Bythiospeum klemmi (H.D. Boeters, 1969)
Plagigeyeria klemmi H. Schütt, 1961
Nematurella klemmi (FOSSIL) W.R. Schlickum, 1964 †