Re: Yellow-spotted nudi from Red Sea

April 22, 2010
From: Déwald Swanepoel

Concerning message #13191:

Hi Bill,

I'm just curious as to why you're saying that Henrik's animal is probably an unnamed species of Thysanozoon and not T. nigropapillosum?

I recently photographed a similar flatworm at Sodwana, South Africa which I identified as T. nigropapillosum but after having read this posting of yours I'm not so sure anymore.

Locality: Sodwana Bay, 15-20m, KwaZulu-Natal, Indian Ocean, 17 April 2010, Reef. Photographer: Déwald Swanepoel.

Regards,
Déwald Swanepoel

dewald.swanepoel@gmail.com

Swanepoel, d., 2010 (Apr 22) Re: Yellow-spotted nudi from Red Sea. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/23553


Dear Déwald,

In that earlier message I didn't actually say it was not T. nigropapillosum but I did say I was not an expert on flatworms and suggested anyone interested to refer to references on the Flatworm Fact Sheet. That was some years ago and experts I asked at the time identified it as Thysanozoon sp. It seems they now accept that it is T. nigropapillosum.

I have a few flatworms on the Forum because they are often mistaken for nudibranchs, but with few exceptions I deliberately don't identify them to species since I am not an expert. Like nudibranchs, flatworms are often difficult to identify, and expert opinion can change as more research is done. So my advice is to follow the most recent advice from an expert on flatworms, or a book or website authored by such an expert.

Best wishes,
Bill Rudman

Rudman, W.B., 2010 (Apr 22). Comment on Re: Yellow-spotted nudi from Red Sea by Déwald Swanepoel. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/23553

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