OKINAWAN
OPISTHOBRANCH OF THE WEEK

Chromodoris elisabethina Bergh, 1877 (56mm)

Opisthobranch of the Week Data

Taxonomy:

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


Species Account:

        Chromodoris elisabethina is one of twelve or so species of stripped Chromodoris found on Okinawa. Typically, C. elisabethina has a more or less continuous narrow black stripe running down the mid-dorsal line, and as the featured animal illustrates, sometimes has a series of interrupted black streaks to either side of the mid-dorsal line. The animals most closely resembling C. elisabethina are C. annae and C. hamiltoni; all three animals exhibit a sky-blue base color of the dorsum and are similar in pigmentation and stripping, but C. annae lacks the mid-dorsal line of C. elisabethina and C. hamiltoni lacks the U-shaped black line running around the back of the gill pocket (Rudman, 1982).

        Chromodoris elisabethina is considered to be rare on Okinawa; I've collected eleven specimens since the first one was found in early September, 1989.


Taxonomic Note:

        I found a fair amount of confusion in the literature in re the correct spelling of Chromodoris elisabethina; some authors have the name spelled as C. elizabethina, but others use the former spelling. Dave Behrens cleared up the confusion by supplying the following information:

Literature Cited:


Copyright © 1999 Robert F. Bolland
Digitally manipulated photo