Glossodoris gregorius - or is it?

April 2, 2009
From: Déwald Swanepoel

Dear Bill,

I've photographed this nudibranch at Ponta Malongane in southern Mozambique. I have tried to identify it and was given some good pointers by other divers but I'm still confused.

Locality: Ponta Malongane, 16 metres, Mozambique, Indian Ocean, 29 March 2009. Photographer: Déwald Swanepoel.

While I think I have the species down now, I'm unsure what the "real" name is. I don't even know if this is a matter of taxonomy or just latin grammar but the three candidates that I'm left with are
Glossodoris gregorius - cf. Rudman
Glossodoris gregoria - cf. Coleman
Glossodoris plumbea - cf. Debelius/Kuiter

I would very much appreciate your clarification in this regard.

Regards,
Déwald Swanepoel

dewald.swanepoel@gmail.com

Swanepoel, D, 2009 (Apr 2) Glossodoris gregorius - or is it?. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/22382

Dear Déwald,
Some of these species of Glossodoris are difficult to separate externally but I am 99% sure that this is what I have called on the Fact Sheet the East African colour form of Glossodoris cincta. Glossodoris gregorius is very similar in colour, but the shape and heavy denticulation of its teeth and bifid jaw plates are quite different. I considered the possibility that the difference in the teeth were because of its small size, but the few small specimens of G. cincta I had available to study didn't show such denticulation. It is certainly something that needs following up, but at present I would identify your animal as G. cincta.

Best wishes,
Bill Rudman

Rudman, W.B., 2009 (Apr 2). Comment on Glossodoris gregorius - or is it? by Déwald Swanepoel. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/22382

Factsheet

Glossodoris cincta

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