Food of Jorunna funebris

May 9, 2001
From: Sylvain LE BRIS

Hi
Following my earlier message I just found another reference to the food of Jorunna funebris. This nudibranch can also eat the blue sponge Oceanapia sp. from India

Fontana A., Cavaliere P., Wahidulla S., Naik C. G. and Cimino G., 2000. A new antitumor isoquinoline alkaloid from the marine nudibranch Jorunna funebris. Tetrahedron, 56: 7305-7308

It seems that this nudibranch can eat many blue sponges. I know it is not the topic of this forum, but if anyone may help me to identify the blue sponge Xestospongia sp of the Gulf of Thailand or has some references...
Thank you
Sylvain

sylvain.lebris@freesbee.fr

Le Bris, S., 2001 (May 9) Food of Jorunna funebris. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/4302

Dear Sylvain,
There are a couple of references in my earlier comments on Mary Jane's message. The big question is whether the sponge taxonomy is correct. As I have said earlier, there are very few sponge taxonomists and sponge taxonomy is very difficult, often preserved specimens lacking most of the characters needed for identification. Many sponges can also take many growth forms and are often very variable in colour. I am sure your sponge expert is very good, but from my experience, even experts find it hard to agree. Until a genus or family of sponges is rigorously revised, using all available modern techniques, and relevant old type material examined, identification will be a major problem.

My advice is to keep samples of the sponges, preferably with photographs, and wait until the problems of sponge taxonomy and nomenclature improve. Waiting, of course, is a major problem from natural products chemists who discover a new molecule or compound and need to publish quickly.

Best wishes,
Bill Rudman

Rudman, W.B., 2001 (May 9). Comment on Food of Jorunna funebris by Sylvain LE BRIS. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/4302

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