Known only from Indonesia, Fiji and French Polynesia.
Rangiroa, French Polynesia, August, 2000. Photo: Daniel L. Geiger.
Similar in shape and colour to Glossodoris atromarginata but colour much more intense, with background colour a bright brownish yellow. Differs from G. atromarginata in having radular teeth of half the size.
• Rudman, W.B. (1986) The Chromodorididae (Opisthobranchia: Mollusca) of the Indo-West Pacific: the genus Glossodoris Ehrenberg (=Casella, H.& A. Adams). Zoological Journal of the Linnean Society, 86: 101-184.
Rudman, W.B., 2000 (December 18) Glossodoris sibogae (Bergh, 1905). [In] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/glossibo
April 6, 2006
From: Jennifer Eaton
I noticed that you do not yet have any nudibranchs from Suvorov, Cook Islands. This picture was taken on the inside of the atoll near the fringing reef.
I hope I have the identification right, Glossodoris atromarginata.
Locality: Suvorov Island, Cook Islands. Pacific. Depth: 10 feet. August 2005. sandy rubble. Photographer: Jennifer Eaton
email@example.comEaton, J., 2006 (Apr 6) Glossodoris sibogae? from the Cook Islands. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/15497
It could be G. atromarginata but I am pretty sure it is Glossodoris sibogae, which has a distinct yellowish background colour and white submarginal band aroud the mantle edge. The only way to be sure however is to dissect the animal and looks at its teeth!
November 24, 2005
From: Mathieu Bayon
I would like to confirm an identification, is that Glossodoris atromarginata in the picture ?
Locality: Mauritius, Indian ocean. reef. Depth: 18 meters. Length: 50 mm, 14 July 2005. Photographer: Mathieu Bayon
Mathieubayon@intnet.muBayon, M., 2005 (Nov 24) Glossodoris sibogae? from Mauritius. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/15340
There are a number of species which are similar in shape and colour to G. atromarginata including the recently described G. tibboeli. Unfortunately some can only be identified at present from their internal anatomy, in particular the size and shape of their radular teeth. This come closest to G. sibogae, a species which until now has not been recorded from the Indian Ocean. So I will tentatively indetfy it as that species, but I can;t be 100% sure without some information on its anatomy.
November 8, 2005
From: Yves Esvan
I saw this nudibranch on the reef in Tahiti. I thing it is a chromodorid, but I don't know exactly whicj one.
Locality: Arue reef, Tahiti, French Polynesia. Pacific. Depth: 5 m. Length: 3 cm. 21 October 2005. reef. Photographer: Yves Esvan
firstname.lastname@example.orgEsvan, Y., 2005 (Nov 8) Glossodoris sibogae from Tahiti. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/15196
This is most probably a species which I have identified as Glossodoris sibogae, but it is very similar to G. atromarginata so the only sure way to identify it is to look at its radular teeth! However from the general shape of the body, the bright yellowish background colour, and the broad white mantle border are all good signs that it is G. sibogae. It seems quite common in French Polynesiaa swe already have a record on the Forum from there, and Pruvot-Fol described it from the Tuamotu Archipelago as G. undulata.
Rudman, W.B. (1986) The Chromodorididae (Opisthobranchia: Mollusca) of the Indo-West Pacific: The genus Glossodoris Ehrenberg (= Casella, H. & A. Adams). Zoological Journal of the Linnean Society, 86(2): 101-184
January 16, 2002
From: Ken Tucker
I'm having trouble identifying this nudibranch, shot in Fiji while diving there this March. It was between 1.0" to 1.5" and found in Bligh Water, smack in the middle of the Vatu-i-ra Passage, which runs between Vanua Levu and Viti Levu.
Perhaps you can help.
email@example.comTucker, K., 2002 (Jan 16) Glossodoris sibogae from Fiji. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/4827
I am pretty sure this is Glossodoris sibogae. It looks very much like forms of G. atromarginata but the distinct white band around the mantle edge and the shape of the rhinophore clubs are indicative of G. sibogae. The only real way to be sure is to lookat the radular teeth which are proportionally much smaller than in G. atromarginata.
December 24, 2000
From: Daniel L. Geiger
I think this is Glossodoris atromarginata. I collected it at Rangiroa, French Polynesia, August, 2000.
firstname.lastname@example.orgGeiger, D.L., 2000 (Dec 24) Glossodoris sibogae from French Polynesia. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/3398
This does look like G. atromarginata but I am pretty sure this is Glossodoris sibogae which is similar in colour, but the colours are much more intense. the only way to be sure is to have a look at the anatomy, because in G. sibogae the radular teeth are half the size of those of similarly sized specimens of G. atromarginata.