1. Genus Bosellia Trinchese, 1891
2. Genus Elysia Risso, 1818
3. Genus Plakobranchus van Hasselt, 1824
4. Genus Thuridilla Bergh, 1872
5. Genus Actaeon Rang, 1829 accepted as Elysia Risso, 1818 (Not available from Oken, 1815)
6. Genus Aplysiopterus Delle Chiaje, 1830 accepted as Elysia Risso, 1818
7. Genus Checholysia Ortea, Caballer, Moro & Espinosa, 2005 accepted as Elysia Risso, 1818
8. Genus Elysiella Bergh, 1871 accepted as Elysia Risso, 1818
9. Genus Elysiella A. E. Verrill, 1872 accepted as Elysia Risso, 1818 (unaccepted > junior subjective synonym, Invalid: junior homonym of Elysiella Bergh, 1871)
10. Genus Elysiobranchus Pruvot-Fol, 1930 accepted as Elysia Risso, 1818
11. Genus Hydropsyche Kelaart, 1858 accepted as Elysia Risso, 1818 (Invalid: junior homonym of Hydropsyche Pictet, 1834 [Trichoptera])
12. Genus Pattyclaya Ev. Marcus, 1982 accepted as Elysia Risso, 1818
13. Genus Placobranchus [sic] accepted as Plakobranchus van Hasselt, 1824 (Incorrect subsequent spelling)
14. Genus Pterogasteron Pease, 1860 accepted as Elysia Risso, 1818
15. Genus Rhyzobranchus Cantraine, 1835 accepted as Elysia Risso, 1818 (Unavailable name: established in synonymy of Elysia)
16. Genus Thallepus Swainson, 1840 accepted as Elysia Risso, 1818
17. Genus Thridachia P. Fischer, 1883 accepted as Elysia Risso, 1818 (Unjustified emendation of Tridachia)
18. Genus Tridachia Deshayes, 1857 accepted as Elysia Risso, 1818
19. Genus Tridachiella MacFarland, 1924 accepted as Elysia Risso, 1818

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