Re: Berthellina edwardsii(?) from Senegal

July 5, 2003
From: Juan Lucas Cervera

Dear Bill and Marina,
I'm very surprised to see in Marina's message one of the Berthellina from Senegal with a whitish "shadow" under the skin. If it can be proved in the future that in Senegal there are Berthellina specimens with a shell placed in an anterior position, well ... we could think that there is another undescribed species.

All the Atlantic (from both sides, including Cape Vert and Angola) specimens that Terry Gosliner and I have examined have the shell placed posteriorly. To be sure of the shell placement, you can examine the length of collumelar muscle. An anterior position has a short collumelar muscle; a posterior placement has a long collumelar muscle. Moreover, an examination of the reproductive system would needed. Definitely, the genus Berthellina is one of the most amazing among the opisthobranchs.
Regards.
Lucas.

lucas.cervera@uca.es

Cervera, J.L., 2003 (Jul 5) Re: Berthellina edwardsii(?) from Senegal. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/10403

Dear Lucas,
It's possible that the whitish 'shadow' isn't a shell at all, but its size and shape look right.
Best wishes,
Bill Rudman

Rudman, W.B., 2003 (Jul 5). Comment on Re: Berthellina edwardsii(?) from Senegal by Juan Lucas Cervera. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/10403

Factsheet

Berthellina edwardsii

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