1. Species Hydatina albocincta (van der Hoeven, 1839)
2. Species Hydatina amplustre (Linnaeus, 1758)
3. Species Hydatina crebristriata (H. Woodward, 1879) †
4. Species Hydatina exquisita Voskuil, 1995
5. Species Hydatina fasciata (Bruguière, 1792)
6. Species Hydatina montillai Delsaerdt, 1996
7. Species Hydatina physis (Linnaeus, 1758)
8. Species Hydatina vesicaria ([Lightfoot], 1786)
9. Species Hydatina zonata ([Lightfoot], 1786)
10. Species Hydatina aplustre [sic] accepted as Aplustrum amplustre (Linnaeus, 1758) represented as Hydatina amplustre (Linnaeus, 1758) (misspelling)
11. Species Hydatina cinctoria (Perry, 1811) accepted as Hydatina zonata ([Lightfoot], 1786)
12. Species Hydatina circulata (Martyn, 1789) accepted as Hydatina zonata ([Lightfoot], 1786) (non-binominal)
13. Species Hydatina exigua Hedley, 1912 accepted as Noalda exigua (Hedley, 1912)
14. Species Hydatina eximia (Deshayes, 1863) accepted as Micromelo scriptus (Garrett, 1857)
15. Species Hydatina filosa Schumacher, 1817 accepted as Hydatina physis (Linnaeus, 1758) (unaccepted > junior subjective synonym)
16. Species Hydatina inflata Dunker, 1877 accepted as Hydatina zonata ([Lightfoot], 1786) (junior synonym)
17. Species Hydatina stroemfeldi [sic] accepted as Hydatina vesicaria ([Lightfoot], 1786) (unaccepted > misspelling - incorrect subsequent spelling)
18. Species Hydatina stromfelti Odhner, 1932 accepted as Hydatina vesicaria ([Lightfoot], 1786) (unaccepted > junior subjective synonym)
19. Species Hydatina velum (Gmelin, 1791) accepted as Hydatina zonata ([Lightfoot], 1786)
20. Species Hydatina verrilli Pilsbry, 1949 accepted as Hydatina vesicaria ([Lightfoot], 1786) (unaccepted > junior subjective synonym)
21. Species Hydatina vexillum G. B. Sowerby II, 1868 accepted as Hydatina zonata ([Lightfoot], 1786)
22. Species Hydatina nitidula G. B. Sowerby II, 1868 (uncertain > taxon inquirendum, use in recent liteature currently undocumented)

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