Fahey & Gosliner, 1999
Known only from RyuKyu Islands (Okinawa).
UPPER: About 40mm long. 20m depth., Kerama Is. near Okinawa. LOWER: Juvenile, about 5mm long, found at 7m depth underside of a dead coral. Kerama Island. PHOTO: Atsushi Ono.
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White with orange-lined ridges. There can be orange marks between the ridges. The mantle edge has a submarginal orange band and a margin of intense white. The gills and rhinophores are translucent white with closely sprinkled black spots.
• Fahey, S. & Gosliner, T.M. (1999) Preliminary Phylogeny of Halgerda (Nudibranchia: Halgerdidae) from the tropical Indo-Pacific, with descriptions of three new species. Proceedings of the California Academy of Sciences, 51(11): 425-448.
Rudman, W.B., 2000 (March 14) Halgerda diaphana Fahey & Gosliner, 1999. [In] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/factsheet/halgdiap