Trinchesia diminutiva 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 the Hawaii Institute of Marine Biology, Coconut Island, Oahu, Hawaii.Pittman, C. & Fiene, P. (2015). Cuthona diminutiva, Sea Slugs of Hawaii.
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