Gyraulus isingi B.C. Cotton & F.C. Godfrey,1932
Ferrissia isseli (J.R. Bourguignat, 1866)
Planorbarius isseli (FOSSIL) (F. Sacco, 1886 †)
Anisus issykulensis (S. Clessin, 1907)
Anisus iturupensis L.A. Prozorova& Y.I. Starobogatov, 1997
Gyraulus iwaotakii A. Mori, 1938
Gyraulus jankovskajae Z.I. Izzatullaev, 1984
Laevapex japonica T. Habe & J.B. Burch,1965
Anisus japonicus (E.C. Von Martens, 1867)
Steklovidiscus jaroslavi (FOSSIL) (Gozhik & Prysjazhnjuk,1978 †)
Planorbula jenksii P.P. Carpenter
Camptoceras jiraponi B. Hubendick, 1967
Anisus johanseni (A. Mozley, 1934)
Plesiophysa johni J.B. Burch, 1977
Laevapex joseana (J.P.E. Morrison, 1946)
Bulinus jousseaumei P. Dautzenberg, 1890
Glyptophysa jukesii (A. Adams, 1861)
Gyraulus jukici (Š. Brusina, 1902)
Ferrissia junodi M. Connolly, 1925
Lentorbis junodi (M. Connolly, 1922)
Gyraulus jurkovici (Š. Brusina, 1902)
Gyraulus kahuica (H.J. Finlay & C.R. Laws,1931)
Anisus kamtschaticus (C.A. Westerlund, 1876)
Segmentorbis kanisaensis (H.B. Preston, 1914)
Pecosorbis kansasensis (S.S. Berry, 1966)
Gyraulus katurici (Š. Brusina, 1897)
Ferrissia kavirondica G. Mandahl-Barth, 1954
Ancylastrum kempi H.B. Preston, 1912
Helisoma kennicotti H.B. Baker, 1945
Fossulorbis kermatoides (A.V.M.D. D'Orbigny,1835)
Glyptophysa kershawi J.E. Tenison-Woods, 1878
Anisus khabarovskiensis L.A. Prozorova& Y.I. Starobogatov, 1997
Gyraulus khoresmicus L.A. Prozorova& Y.I. Starobogatov, 1996
Gyraulus kigeziensis H.B. Preston, 1912
Ancylastrum kimiloloensis H.A. Pilsbry & C.E. Beecher,1914