Umbraculum - one or two species?

February 16, 2000
From: Erwin Koehler

Dear Bill,
Some days ago I renamed my U. mediterraneum from the Canary Islands into U. umbraculum because I thought there is only one species in the genus Umbraculum. Actually only U. umbraculum is listed to live in the Medterranean, and Peter Wirtz IDed his photos in older books as U. mediterraneum, but in his recent publication he uses U. umbraculum.
Erwin

Medlugs.Koehler@t-online.de

Koehler, E., 2000 (Feb 16) Umbraculum - one or two species?. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/1898

Dear Erwin,
I can't see any external difference between Umbraculum umbraculum and Umbraculum mediterraneum but without some anatomical evidence it really doesn't get us further ahead by saying they must be the same. In fact I find the act of synonymising two species together is more exacting than describing a new species.

I am just not aware of any recent anatomical comparison of the two species. If someone can let me know of one I would be most grateful. Otherwise I will err on the side of caution.

best wishes,
Bill Rudman.

Rudman, W.B., 2000 (Feb 16). Comment on Umbraculum - one or two species? by Erwin Koehler. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/1898

Factsheet

Umbraculum mediterraneum

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