Is this Glossodoris angasi from Bare Island, La Perouse, NSW
March 5, 2007
From: Andrew Trevor-Jones
G'day Bill,
Is this one Glossodoris angasi?
Locality: Bare Island, La Perouse, 10.6 m, NSW, Australia, Pacific Ocean, 3 December 2006, Rocky reef with algae and sponges. Length: ~40 mm. Photographer: Andrew Trevor-Jones.
Andrew Trevor-Jones
atj777@attglobal.net
Trevor-Jones, A.G., 2007 (Mar 5) Is this Glossodoris angasi from Bare Island, La Perouse, NSW. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/19555
Dear Andrew,
Yes this is G. angasi. It differs from G. atromarginata, which you found at the same time [message #19554] in a number of anatomical characters, and fortunately one very obvious external chracter which can be seen clearly in your photo. In G. atromarginata, there are a few ovate or spherical mantle glands embedded in the mantle tissue some distance in from the mantle edge, while in G. angasi the mantle glands form a crowded, ramifying network right at the mantle edge.
Another external difference is that the mantle edge in G. angasi is usually a shade of brown, [pinkish brown to dark brown] while in G. atromarginata, as its name suggests, the mantle edge is black.
Best wishes,
Bill Rudman
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