Elysia thompsoni? - Fremantle, Western Australia

June 28, 2007
From: Brent Murdoch

Having a lot of problems with this one!

It does not have the same coloring as Elysia thompsoni but that is closest I can find. As far as I can tell it has not been seen in the Swan River before, which adds to me being sceptical.

Locality: Fremantle, Swan River, 6.5 m, Western Australia, Indian, 02 February 2007, sandy. Length: 55 mm. Photographer: Brent Murdoch.

Thanks in advance
Brent Murdoch

brent@murdoch.id.au

Murdoch, B.D., 2007 (Jun 28) Elysia thompsoni? - Fremantle, Western Australia. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/19499

Dear Brent,

I think this is a rather damaged Elysia ornata. Elysia thompsoni is a rather specialised feeder on Acetabularia and I assume it doesn't grow much larger than 10-15 mm. The two purple edged  'lobes' on the parapodia of your animal seem to me to be all that is left of the 'full' parapodia and the area in between has been bitten out. Also the head tentacles are mishapen and partially fused and the head is very strange. I suspect it has been partially bitten off and regrown as well.

Best wishes,
Bill Rudman

Rudman, W.B., 2007 (Jun 28). Comment on Elysia thompsoni? - Fremantle, Western Australia by Brent Murdoch. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/19499

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Elysia ornata

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