Trinchesia hamanni is a species of sea slug, an aeolid nudibranch, a marine gastropod mollusc 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 La Jolla, California.Rudman, W.B. (2005 October 4) Cuthona hamanni Behrens, 1987. [In] Sea Slug Forum. Australian Museum, Sydney.
Description The typical adult size of this species is 14 mm.
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