Trinchesia puellula 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 Japan. It has been reported from the Japan Sea coast at Echizen Coast, Fukui Prefecture, north-west coast of Honshu and from the Pacific Ocean coast at Hachijo Island. Similar looking animals have been found at Mooloolaba, Sunshine Coast, Queensland, Australia.Rudman, W.B., 2002 (July 11) Cuthona puellula (Baba, 1955). [In] Sea Slug Forum. Australian Museum, Sydney.
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