Thecacera sp. 2? from NW Australia

November 30, 2006
From: Mary Gudgeon

I'm trying to find an ID for a nudibranch I found on the weekend. It looks like Thecacera sp. 2, it is entirely yellow but has no black markings at all.

Locality: Exmouth Gulf, 5 metres, Western Australia, Indian Ocean, 26 November 2006, Sandy bottom. Length: 6 mm. Photographer: Mary Gudgeon.

Mary Gudgeon.

mary@gudgeon.id.au

Gudgeon, M.L., 2006 (Nov 30) Thecacera sp. 2? from NW Australia. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/18687

Dear Mary,
I would tend to agree that it is Thecacera sp. 2 without any black spots. If you look at other photos of black-spotted members of this species you will see there is a very large ribbed structure at the base of each rhinophore. I suspect it is of sensory function. Your animal has also got this unusual structure which makes me think its the same species.

Best wishes,
Bill Rudman

Rudman, W.B., 2006 (Nov 30). Comment on Thecacera sp. 2? from NW Australia by Mary Gudgeon. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/18687

Factsheet

Thecacera sp. 2

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