Re: Photo of a living 'Berthella' sideralis

January 5, 2007
From: Jeff Goddard

Concerning message #19089:

Bill,
Based on the position of the cephalic tentacles, and especially the eyespots, I think that the animal pictured in Erling Svensen's photo is a Velutina, which is of course a prosobranch. Although the color pattern is different, the partially exposed shell and overall shape of the body are very similar to Velutina prolongata, known from the north Pacific.

Here is an aquarium image of Velutina prolongata showing an eyespot at the base of one of the cephalic tentacles. For a good image of an extended, crawling individual (to compare to the animal in Erling Svensen's image) see Clinton Bauder's image in message #7688.

Locality: unknown locality, unknown, Oregon, USA, Northeast Pacific, January 1996, Rocky subtidal. Length: Approximately 20 mm. Photographer: David Pitkin, US Fish & Wildlife Service.

Best wishes,
Jeff

goddard@lifesci.ucsb.edu

Goddard, J.H.R., 2007 (Jan 5) Re: Photo of a living 'Berthella' sideralis. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/19133

Dear Jeff,

The great find for the new year may quickly become my great mistake for 2007. I wondered about a velutinid but on checking with Erling he said the identification was based on advice from local experts. Of course I take full responsibility.  I would appreciate other comments. If it is a velutinid I think I should remove the message and start again

Best wishes,
Bill Rudman

Rudman, W.B., 2007 (Jan 5). Comment on Re: Photo of a living 'Berthella' sideralis by Jeff Goddard. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/19133

Factsheet

Velutinidae - are they sea slugs?

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