Bonisa nakasa from South Africa
August 3, 2003
From: Rudolph van Jaarsveld
Hi Bill,
Please assist in the identification of the following specimens. Even with the help of Debelius' book I do not have a lot of success.
The photos were taken in 15 meters of water in the bay off Port Elizabeth, South Africa on 18 July 2003. Nikonos V, 1:1 extension tube and 35mm lens.
Regards
Rudolph van Jaarsveld.
rudolph.vanjaarsveld@tcm.co.za
van Jaarsveld, R., 2003 (Aug 3) Bonisa nakasa from South Africa. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/10559
Dear Rudolph,
Certainly the lower photo looks like the animal in one of your earlier messages which I identified as Bonisa nakasa. The upper two photos are more problematic. They could be the same species, or they may be Janolus capensis. Unfortunately I can't see enough detail to be sure. Species of Bonisa differ from Janolus in lacking a branch of the digestive gland up into the cerata on their backs. In colour the lower photo is of Bonisa, but the other two photos could be either, and I can't see clearly through the ceratal wall to determine whether there is any digestive gland htere or not.
Best wishes,
Bill Rudman
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