Re: Rostanga calumus? from S.E. Australia

March 8, 2002
From: Audrey Falconer

Bill,
Everything in the photos has been preserved, and under the terms of our collection permit is required to be lodged at the Melbourne Museum. I don't know if Bob has yet lodged them or not, but I will find out and see if I can get the animal to you. We've also photographed a juvenile (about half grown) animal at another time and I'll see if I can locate that one too.

Re colours: my husband is perpeptually complaining about variation in colours on different computer screens and is trying to adjust for them. I don't think the colours of any of the pictures are accurate - my memory reports them as a deep orange-red and the egg ribbon was the same colour and the live animal from 2 years earlier. If I locate the specimens to send them down to you I'll include the original slides as well.

Oh, I should have mentioned that the egg ribbon was found with no animal in sight, on a small rock without any sponges. The small rock was underneath a large one and there may have been a sponge on there (I don't recall) but there were no Rostanga there. I always assumed that this was a complete egg ribbon but looking at your photo of the multi spiralled ribbon I am now not sure!
Audrey

audrey@bluering.org.au

Falconer, A., 2002 (Mar 8) Re: Rostanga calumus? from S.E. Australia. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/6215

Dear Audrey,
Thanks for the feedback. By chance I found a specimen of Rostanga at Mallacoota in northern Victoria, Australia, last week. It was on an orange sponge with 2 egg masses, both of which look like the one in your photos. Interestingly the colour of the two egg ribbons was quite different, one a dull brick red and the other a bright orange red. My first job will be to have a look at the radula of the animal and identify it. I kept the slug alive for 2 days in the hope that it would lay an egg ribbon that I could definitely associate with it, but unfortunately it was either out of eggs or just unco-operative. I'll let you know the result.
Best wishes,
Bill Rudman

Rudman, W.B., 2002 (Mar 8). Comment on Re: Rostanga calumus? from S.E. Australia by Audrey Falconer. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/6215

Factsheet

Rostanga calumus

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