Trinchesia genovae is a species of sea slug, an aeolid nudibranch, a marine gastropod mollusc in the family Trinchesiidae.Tenellia genovae (O'Donoghue, 1929). In: MolluscaBase eds. (2026). MolluscaBase. Tenellia genovae (O'Donoghue, 1926). Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=1347375 on 2026-03-02 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,
Distribution This species was described from Genoa, Italy. It has been reported from the NE Atlantic from Mulroy Bay, County Donegal Nunn J (1994). Cuthona genovae (O'Donoghue, 1926) (Mollusca: Opisthobranchia) from the North Coast of Ireland. Irish Nat J 24:416–417 83. and Lough Hyne, County Cork, IrelandPicton, B. E., & K. Wilson, (1984). Cuthona genovae (O'Donoghue 1926), an aeolid nudibranch new to the fauna of the British Isles. Journal of Conchology 31:349-352. south to Portugal and in the Mediterranean Sea. Picton, B.E. & Morrow, C.C. (2010). Cuthona genovae (O'Donoghue, 1926) [In] Encyclopedia of Marine Life of Britain and Ireland. Rudman, W.B. (2008 May 1). Cuthona genovae (O'Donoghue, 1926). [In] Sea Slug Forum. Australian Museum, Sydney.
Description This species was previously confused with Trinchesia foliata.Bouchet, P. (1977). Trinchesia genovae (O'Donoghue, 1926) éolidien méconnu du littoral Méditerranéen. Vie et Milieu, ser. A, Biologie Marine 26(2):235-242. The typical adult size of this species is 5–6 mm.Thompson, T.E. and Brown, G.H. (1984). Biology of Opisthobranch Molluscs, Volume II. The Ray Society. 229 pages 41 plates, 40 figures
References
Gofas, S.; Le Renard, J.; Bouchet, P. (2001). Mollusca. in: Costello, M.J. et al. (eds), European Register of Marine Species: a check-list of the marine species in Europe and a bibliography of guides to their identification. Patrimoines Naturels. 50: 180-213
External links 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