Phyllidia carlsonhoffi in Derawan, Indonesia

May 23, 2007
From: Carrie Lo

Concerning message #18654:

Dear Bill,
My buddy took this photo in Derawan. I didn't see it myself and therefore has no idea on its size. Probably at about 15 m water. I guess it may be Phyllidia madangensis. Is that right?

Locality: Site: Coral Canyon, Derawan, 15m, Indonesia, 22 April 2007. Photographer: Pong Lai.

Thanks,
Carrie

carrielohc@yahoo.com.hk

Lo, C., 2007 (May 23) Phyllidia carlsonhoffi in Derawan, Indonesia. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/19905

Dear Carrie,
There are two species which look quite similar, P. madangensis and P. carlsonhoffi. The most obvious external difference is unfortunately on the sole of the foot - P. carlsonhoffi having a median black line and P. madangensis not. There are more subtle dorsal differences with P. madangensis having a small white spot or tubercle right in front of each rhinophore, which is absent in your animal. Also the tubercles seem to be a bit more ovate in P. carlsonhoffi and rounded in P. madangensis. On balance I think your animal is P. carlsonhoffi although I have not seen an example of either species in which the median tubercles are joined in a ridge as in your animal.

Best wishes,
Bill Rudman

Rudman, W.B., 2007 (May 23). Comment on Phyllidia carlsonhoffi in Derawan, Indonesia by Carrie Lo. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/19905

Factsheet

Phyllidia carlsonhoffi

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