Re: Glossodoris dendrobranchia?

February 5, 2007
From: C. Carlson & P. J. Hoff

Concerning message #19357:

Bill,
We have only recorded 21 specimens & that includes 3 or 4 w/black line (= G. atromarginata ). For some reason the one issue of Pacific Science that had the description of Glossodoris tibboeli is missing from our library. It appears though that the 'species' we had earlier separated as 'c.f. atromarginata' pretty well matches up with G. tibboeli. As well as Guam, it also occurs on Saipan as well as Sarigan and Asuncion in the Northern Marianas. Our largest measured specimen is 35 mm -- none show any secondary folding like the one on the Forum and in all samples the gray mantle edge line is relatively straight. I have also seen a scan of one that appears to have branched branchia -- so our records don't help at all!

Clay Carlson & Patty Jo Hoff

ccarlson@guam.net

Carlson, C & Hoff, P-J., 2007 (Feb 5) Re: Glossodoris dendrobranchia?. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/19385

Dear Clay,
Thanks for your help. It would have been nice if you could have provided a simple answer, but simple answers aren't that common. Certainly I would expect a more wavy or folded line in larger specimens than in smaller specimens but I guess we will need to wait until more observations are made on this species.

I am a little hesitant to identify Glossodoris cf atromarginata with G. tibboeli because there seem to be quite a few 'hidden' species with very similar colour patterns, but I think the practical approach here is to tentatively identify all these Marianas Ids records as G. tibboeli.

Best wishes,
Bill Rudman

Rudman, W.B., 2007 (Feb 5). Comment on Re: Glossodoris dendrobranchia? by C. Carlson & P. J. Hoff. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/19385

Factsheet

Glossodoris tibboeli

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