Halgerda terramtuentis
Bertsch & Johnson, 1982

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

DISTRIBUTION

Known only from the Hawaiian Islands.

PHOTO

Hawaii. Photos: Scott Johnson.

This is one of a group of white species of Halgerda with orange markings. This species is characterised by relatively low white-tipped tubercles, a network of solid gold-orange lines on the dorsum between the tubercles, and a submarginal gold-orange line around the mantle edge. Known only from Hawaii.

There are three species of Halgerda with a network of orange lines. In H. malesso the network of lines sometimes fuse to form orange patches in the depressions, there are multiple fine orange lines around the mantle edge, and the fairly high tubercles are capped with orange. In Halgerda batangas, which also has a network of orange lines, the ridges and tubercles are low and rounded. The tubercles are capped with orange-red with a basal ring of white. The edge of the mantle is white with orange-red tubercles. The foot is edged with orange. In Halgerda terramtuentis the lines are golden orange, the tubercles are capped with white and there is a single submarginal orange line around the mantle edge..

Other similar coloured species include Halgerda carlsoni and Halgerda aurantiomaculata.

References:
• Bertsch, H. & Johnson, S. (1982) Three new species of dorid nudibranchs (Gastropoda: Opisthobranchia) from the Hawaiian Islands. The Veliger, 24(3): 208-218.
• Carlson, C.H. & Hoff, P.J. (1993) Three new Halgerda species (Doridoidea: Nudibranchia: Opisthobranchia) from Guam. The Veliger, 36(1): 16-26.
• Carlson, C.H. & Hoff, P.J. (2000) Three new Pacific species of Halgerda Opisthobranchia: Nudibranchia: Doridoidea). The Veliger, 43(2): 154-163.

Authorship details
Rudman, W.B., 2000 (June 26) Halgerda terramtuentis Bertsch & Johnson, 1982 . [In] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/factsheet/halgterr

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