1. Subfamily Helicodontinae Kobelt, 1904
   1. Genus Atenia E. Gittenberger, 1968
   2. Genus Darderia Altaba, 2007
   3. Genus Drepanostoma Porro, 1836
   4. Genus Falkneria H. Nordsieck, 1989
   5. Genus Helicodonta A. Férussac, 1821
   6. Genus Protodrepanostoma Germain, 1929 †
   7. Genus Chilodon Ehrenberg, 1831 accepted as Helicodonta A. Férussac, 1821
   8. Genus Contorta Megerle von Mühlfeld, 1841 accepted as Drepanostoma Porro, 1836
   9. Genus Euphemia H. Beck, 1847 accepted as Helicodonta A. Férussac, 1821 (unaccepted > junior homonym, Invalid: junior homonym of Euphemia Robineau-Desvoidy, 1830 [Diptera]; also a junior objective synonym of Helicodonta)
   10. Genus Gonostoma Held, 1838 accepted as Helicodonta A. Férussac, 1821
   11. Genus Trigonostoma Fitzinger, 1833 accepted as Helicodonta A. Férussac, 1821 (Invalid: Junior homonym of Trigonostoma Blainville, 1825 [Cancellariidae]; also a junior objective synonym of Helicodonta)
   12. Genus Vortex H. Beck, 1837 accepted as Helicodonta A. Férussac, 1821 (unaccepted > junior objective synonym, Invalid: junior objective synonym of Helicodonta)
2. Subfamily Lindholmiolinae Schileyko, 1978
   1. Genus Lindholmiola P. Hesse, 1931
3. Subfamily Soosiinae H. Nordsieck, 2014
   1. Genus Prosoosia H. Nordsieck, 1986 †
   2. Genus Soosia P. Hesse, 1918

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