OKINAWAN
OPISTHOBRANCH OF THE WEEK

Halgerda albocristata Gosliner & Fahey, 1998 (10mm)

Opisthobranch of the Week Data

Taxonomy:

Frequency on Okinawa:
Collection Data:
[brackets indicate range for all Okinawa-collected specimens of the species]


Species Account:

        Halgerda albocristata is a recently described discodorid (Gosliner & Fahey, 1998) reported from both Guam and the Marshall Islands, as well as Indonesia, Okinawa, and the Philippines. The trivial name, albocristata has reference to the obvious white-capped crests on the upper dorsum. The only other Halgerda on Okinawa resembling H. albocristata is H. elegans, although the white ridges of H. albocristata and the orange-yellow crests of H. elegans readily separate the two species.

        I've collected six individuals from Okinawa and all six were collected between approximately three and four and a half meters of water. The featured animal was found crawling in the open in association with a live stony coral reef during a daytime SCUBA excursion.

        Literature Cited:


Page Date: 18 January '99
Page Modification Date: 15 May '00
Digitally manipulated photo
Copyright © 2000 Robert F. Bolland