Catriona is a genus of sea slugs, aeolid nudibranchs, marine gastropod molluscs in the family Trinchesiidae.Gosliner, T. M.; Griffiths, R. J. (1981). Description and revision of some South African aeolidacean Nudibranchia (Mollusca: Gastropoda. Annals of the South African Museum. 84: 105-150 All species were transferred to Tenellia as a result of a DNA phylogeny study in 2016.Cella, K; Carmona Barnosi, L.; Ekimova, I; Chichvarkhin, A; Schepetov, D; Gosliner, T. M. (2016). A radical solution: The phylogeny of the nudibranch family Fionidae. PLoS ONE. 11(12): e0167800. It was reinstated in 2017, and once again in 2025, on the basis of DNA and morphological criteria.Korshunova, T.; Martynov, A.; Picton, B. (2017). Ontogeny as an important part of integrative taxonomy in tergipedid aeolidaceans (Gastropoda: Nudibranchia) with a description of a new genus and species from the Barents Sea. Zootaxa. 4324(1): 1.Korshunova T.; Fletcher K.; Martynov A. (2025). The endless forms are the most differentiated—how taxonomic pseudo-optimization masked natural diversity and evolution: the nudibranch case Zoological Journal of the Linnean Society, Volume 204, Issue 4, August 2025, zlaf057, Species According to Korshunova et al. (2025), within the genus Catriona include: Catriona alpha (Baba & Hamatani, 1963) Catriona aurantia (Alder & Hancock, 1842) - type species of Catriona Catriona casha Gosliner & R. J. Griffiths, 1981 Catriona columbiana (O'Donoghue, 1922) - British Columbia aeolid Catriona gymnota (Couthouy, 1838) Catriona kishiwadensis (Martynov, Korshunova, Lundin & Malmberg, 2022) Catriona lonca (Er. Marcus, 1965) Catriona lucerna (Korshunova, Martynov, Lundin & Malmberg, 2022) Catriona maua (Er. Marcus & Ev. Marcus, 1960) Catriona oba (Ev. Marcus, 1970) Catriona osezakiensis (Martynov, Korshunova, Lundin & Malmberg, 2022) Catriona rickettsi (Behrens, 1984) - Doc's aeolid Catriona rongaGofas, S.; Bouchet, P. (2015). Catriona Winckworth, 1941. MolluscaBase eds. (2026). MolluscaBase. Catriona Winckworth, 1941. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=138542 on 2026-03-03 (Er. Marcus, 1961) Catriona spadix (MacFarland, 1966) Catriona susa (Ev. Marcus & Er. Marcus, 1960) Catriona tema (Edmunds, 1968) Catriona urquisa (Er. Marcus, 1965) Catriona venusta (Baba, 1949)
Species names currently considered to be synonyms: Catriona anulata (Baba, 1949): synonym of Trinchesia anulata (Baba, 1949) Catriona beta (Baba & Abe 1964): synonym of Tenellia beta (Baba & Abe 1964) Catriona catachroma (Burn, 1963) synonym of Trinchesia catachroma (Burn, 1963) Catriona nigricolora (Baba, 1955): synonym of Trinchesia nigricolora Catriona ornata (Baba, 1937): synonym of Trinchesia ornata (Baba, 1937) Catriona perca (Marcus Er., 1958) synonym of Trinchesia perca (Er. Marcus, 1958) Catriona pinnifera (Baba, 1949): synonym of Trinchesia pinnifera Catriona puellula (Baba, 1955): synonym of Trinchesia puellula (Baba, 1955) Catriona pupillae Baba, 1961 synonym of Trinchesia pupillae (Baba, 1961) Catriona signifera (Baba, 1961): synonym of Trinchesia signifera Catriona viridiana (Burn, 1962) synonym of Trinchesia viridiana (Burn, 1962)
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