Hypselodoris acriba or H. bayeri?
June 19, 2006
From: Valda Bromfield
Dear Bill
I have been unable to identify this nudibranch in any of Paul Humann's ID books and were hoping that you could help me. Said speciman was moving rapidly over a course sandy bottom. I hope I have sent you enough information.
Locality: The Chimney - Great Dog Island, 45 feet, British Virgin Islands, Caribbean, 24 January 2006, sandy bottom near coral. Length: 1.75 inches. Photographer: Valda Bromfield.
Thank you,
Valda
steval@surfbvi.com
Bromfield, V, 2006 (Jun 19) Hypselodoris acriba or H. bayeri?. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/16899Dear Valda,
Your animal exactly matches a photo Eveline Marcus sent me [message #7999] which she identified as H. bayeri. It was also from the Virgin Islands. As I mention in the earlier message the main difference between this colour form and the one described by Marcus & Marcus (1967), when they named this species, is that it had a pattern of dark blue spots around the mantle edge rather than the radiating lines of your animal. However in a photo from Florida [#13022] we can see an animal with a spotted margin, but also with some small radiating lines suggesting this is a variable feature, as did Eveline Marcus.
Since we know so little about these species, your photo is a valuable contribution to our knowledge. It will be interesting to whether similar links been H. bayeri and H. acriba turn up, as there are many similarities between these two species.
Best wishes,
Bill Rudman
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