Halgerda okinawa
Carlson & Hoff, 2000

Order: NUDIBRANCHIA
Suborder: DORIDINA
Superfamily: EUDORIDOIDEA
Family: Dorididae

DISTRIBUTION

Originally described from Okinawa, but records on the Forum from Indonesia suggest a wider distribution.

PHOTO

Seragaki, Okinawa (26o 30.4'N, 127o 52.6'E)
UPPER: Holotype. 86mm long., from 58m. LOWER: 105mm long. PHOTOS: Bob Bolland.

This recently described (Carlson & Hoff, 2000) species of Halgerda is relatively large, growing to at least 114mm long. It has the typical mantle ridges and depressions of most members of the genus. Apparently unique to this species, the yellow pigment on the tubercles is not just a surface pigment but is incorporated in the tissue right to the core of the tubercles. The species is also known from Indonesia (Gosliner et al, 1996 [p. 160 as Halgerda sp.] There is a page on Bob Bolland's Okinawa Site showing the holotype and paratypes of the species.

References:
• Carlson, C.H. & P.J. Hoff. (2000) Three new Pacific species of Halgerda (Opisthobranchia: Nudibranchia: Doridoidea). The Veliger 43(2):154-163.
• Fahey, S. J. & T. M. Gosliner. (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.
• Gosliner, T.M., D.W. Behrens & G.C. Williams. (1996). Coral Reef Animals of the Indo-Pacific. Sea Challengers, Monterey, California. vi + 314pp.

Authorship details
Rudman, W.B., 2000 (May 26) Halgerda okinawa Carlson & Hoff, 2000. [In] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/factsheet/halgokin

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