Jorunna from Mozambique

May 18, 2000
From: Vincent Tomeno

I was on holiday in Mozambique in February, and I took a picture of a sea slug that I can't identify.

Can somebody help me, please?
Vincent Tomeno
http://v.tomeno.free.fr/

vtomeno@cybercable.fr

Tomeno, V., 2000 (May 18) Jorunna from Mozambique. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/2389

Dear Vincent,
I am pretty sure your animal is the species of Jorunna I am calling Jorunna sp. 2. Can you give me an indication of size? As you will see on this page this species is quite variable in colour and has been reported from South Africa to the Western Pacific.

One interesting possibility is that Jorunna sp. 2 is a species Baba described from Japan as Thordisa parva Baba, 1938. The original illustrations were of a white animal with scattered black papillae. Two recent Japanese books identify this yellow and black animal as Jorunna parva. In Ono, 1999 there is a photo of a yellow animal with the black papillae clustered into patches. It also has a large black mark on the posterior tip of the foot which is characteristic of Jorunna sp. 2. In Suzuki, 2000 there are photos of white and yellow animals with scattered black papillae. Unfortunately the foot is not visible in these photos so I cannot comment on the presence or absence of the black posterior patch on the foot. If someone could confirm the black patch on the foot in the pale Japanese form which matches Baba's original description of Thordisa parva, I think we could be confident in identifying Jorunna sp. 2 with Baba's Thordisa parva. My examination of its anatomy shows that it is a species of Jorunna.

If you have any other photos you would like identified please send them to the Forum. If you can provide some basic locality information and give a rough idea of size it would make the information valuable as a record of the species.

Best wishes,
Bill Rudman.

Rudman, W.B., 2000 (May 18). Comment on Jorunna from Mozambique by Vincent Tomeno. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/2389

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