Halgerda diaphana is a species of sea slug, a dorid nudibranch, shell-less marine gastropod mollusks in the family Discodorididae.MolluscaBase (2018). Halgerda diaphana Fahey & Gosliner, 1999. Accessed on 2018-12-12.Dayrat B. 2010. A monographic revision of discodorid sea slugs (Gastropoda, Opisthobranchia, Nudibranchia, Doridina). Proceedings of the California Academy of Sciences, Series 4, vol. 61, suppl. I, 1-403, 382 figs.
Distribution This species was originally described from numerous specimens collected in Okinawa Island, Japan. It has subsequently been found several times at the nearby Kerama Islands.Rudman, W.B., 2000 (March 14) Halgerda diaphana Fahey & Gosliner, 1999. [In] Sea Slug Forum. Australian Museum, Sydney. Also been found in Dauin, Negros, Philippines.
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