Belgrandiella hubenovi D.G. Georgiev, 2012
Petterdiana hullii (W.F. Petterd, 1889)
Pyrgulopsis humboldtensis R. Hershler, 1998
Pseudamnicola hungarica (FOSSIL) (G.R. von Frauenfeld,1862 †)
Pyrgula hungarica (FOSSIL) Lörenthey, 1894 †
Bythiospeum hungaricum (L. Soós, 1927)
Caspiohydrobia husainovae (Y.I. Starobogatov, 1974)
Bythiospeum husmanni (C.R. Böttger, 1963)
Myrtoessa hyas Radea, 2016
Corrosella hydrobiopsis H.D. Boeters, 1998
Belchatovia hydrobiopsis (FOSSIL) D. Kadolsky & Piechocki,2000 †
Pseudamnicola ianthe C. Radea & A. Parmakelis,2016
Hydrobia iberica P. Jodot, 1953
Alzoniella iberopyrenaica B. Arconada, E. Rolán& H.D. Boeters, 2007
Pyrgulopsis idahoensis H.A. Pilsbry, 1933
Pyrgulopsis ignota R. Hershler, H.P. Liu& H.G. Lang, 2010
Pseudamnicola ilione C. Radea & A. Parmakelis,2016
Turricaspia iljinae (A.N. Golikov& Y.I. Starobogatov, 1966)
Iglica illyrica H. Schütt, 1975
Bythiospeum iltchoi D.G. Georgiev & P. Glöer,2015
Bythiospeum iltchokolevi D.G. Georgiev & P. Glöer,2015
Phreatodrobia imitata R. Hershler & A.J. Longley,1986
Bania immutata (FOSSIL) (M. Hörnes, 1856 †)
Pyrgulopsis imperialis R. Hershler, 1998
Micromelania impressa (FOSSIL) W.A. Wenz, 1925 †
Microbeliscus inaspectus (FOSSIL) (A. Fuchs, 1870 †)
Socenia incerta (FOSSIL) (Š. Brusina, 1892 †)
Turricaspia incerta (FOSSIL) Roshka, 1973 †
Trochispira incerta (FOSSIL) Pan, 1980 †
Prososthenia incipiens (FOSSIL) D. Pantanelli, 1886 †
Pyrgula incisa (FOSSIL) A. Fuchs, 1870 †
Turricaspia incomparabilis (FOSSIL) V.V. Anistratenko& Gozhik, 1995 †
Prososthenia inexpectata (FOSSIL) D. Kadolsky, 1988 †
Saganoa inflata (F.M. Climo, 1974)
Kuschelita inflata F.M. Climo, 1974