Trinchesia barbadiana is a species of sea slug, an aeolid nudibranch, a marine gastropod mollusk in the family Trinchesiidae.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 depth on algae outside the Bellairs Research Institute, Barbados.Rudman, W.B. (2003 February 22) Cuthona barbadiana Edmunds & Just, 1983. [In] Sea Slug Forum. Australian Museum, Sydney.
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