Marionia is a genus of sea slugs, specifically dendronotid nudibranchs, marine gastropod molluscs in the family Tritoniidae.MolluscaBase eds. (2020). MolluscaBase. Marionia Vayssière, 1877. Accessed on 2021-01-09.
Species Species within the genus Marionia include:
Species brought into synonymy Marionia affinis Bergh, 1883: synonym of Marionia blainvillea (Risso, 1818) (synonym) Marionia berghii Vayssière, 1879: synonym of Marionia blainvillea (Risso, 1818) (synonym) Marionia occidentalis Bergh, 1884: synonym of Marionia cucullata (Couthouy, 1852) Marionia tethydea [sic]: synonym of Marionia blainvillea (Risso, 1818) (misspelling of thethydea (Delle Chiaje, 1841))
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