Aeolidiella alderi from Thau, French Mediterranean

November 28, 2007
From: Dominique Horst


Hello Bill,

It's a long time that I planned to dive in Thau. Thau is a kind lagoon opened to the French Mediterranean in the South of France, well-known for its Sea horses and also for many species of Sea slug.
Unfortunately the water is very cold in November and it was not as crowdie as in summer.

Locality: Thau lagoon, 7 m, France, Mediterranean sea, 10 November 2007, muddy. Length: 11 mm. Photographer: Dominique Horst.

I suppose this is Aeolidiella alderi?

Many thanks for your validation.
Dom.

dominique.horst@wanadoo.fr

Horst, D., 2007 (Nov 28) Aeolidiella alderi from Thau, French Mediterranean. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/21133

Dear Dom,

One distinguishing feature of A. alderi is that the first row of cerata on each side is white because the cnidosacs are proportionally much larger than in the other cerata which means there is little room for the digestive gland which gives each ceras its colour.  I would agree with your identification

Best wishes,
Bill Rudman

Rudman, W.B., 2007 (Nov 28). Comment on Aeolidiella alderi from Thau, French Mediterranean by Dominique Horst. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/21133

Factsheet

Aeolidiella alderi

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