Re: Jorunna? or Halgerda? from Mozambique

May 20, 2000
From: Vincent Tomeno

Hello.

Concerning your question about whether the animal had ridges or not. Well, as far as I can remember, the body of this specimen didn't show any ridges.

I'm not sure, as I didn't know that this nudibranch would be difficult to identify, and I didn't look very carefully, but the body really seemed smooth.

I apologise for the poor quality of the picture, but I don't have macro lenses, and the pictures I sent you were enlarged and "sharpened" a bit. Maybe this sharpening suggests ridges where there wasn't.

Vincent Tomeno

vtomeno@cybercable.fr

Tomeno, V., 2000 (May 20) Re: Jorunna? or Halgerda? from Mozambique. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/2421

Dear Vincent,
The more I look at it the colour is wrong for Jorunna sp. 2. Your second photos clearly show a white band around the mantle edge with black spots, which is found in H. wasinensis but not Jorunna sp. 2. So even though you are not sure about ridges I think I will tentatively identify it as Halgerda wasinensis. As I said in the earlier message, although the animals I have see all have fairly noticeable ridging, Terry Gosliner has a photo of an animal from South Africa with much lower rounded ridges.

You don't need to apologise for the photos, it's just unfortunate that you photographed one which looks a bit like two different species.

Best wishes,
Bill Rudman.

Rudman, W.B., 2000 (May 20). Comment on Re: Jorunna? or Halgerda? from Mozambique by Vincent Tomeno. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/2421

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