Re: Aeolid? Janolus? Stiliger? from Sulawesi

February 29, 2000
From: C. Carlson & P.J. Hoff

Bill,
Our guess on this beast would be Stiliger  -- at least Sacoglossa

Details: el83 8.5mm;  Palau, [Nikko Hotel], reef flat;  5 August 1978.

We have this animal from both Palau and Pohnpei.  Our notes on the Palau animal say "rhinophores grooved their entire length".

Using a hotel for a site name is not a good idea.  This one has changed names a couple of times --we just haven't bothered to get the Palauan name for the area.

Clay Carlson & Patty Jo Hoff

Merizo, Guam

clay.carlson@kuentos.guam.net

Carlson, C. & Hoff, P.J., 2000 (Feb 29) Re: Aeolid? Janolus? Stiliger? from Sulawesi. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/1989

Dear Clay & Patty Jo,
For such a little animal it's certainly been photographed a few times! The grooved rhinophores are another good clue to its relationships. The eyes, so close together in the dorsal midline, behind the rhinophores, is characteristic of Costasiella. Another interesting feature clearly seen in your photo is a black spot behind the eyes and in front of the pericardial sac. Burn (1998) in Mollusca: the Southern Synthesis states that species of Costasiella have a 'melanin gland' near the anus, in front of the pericardium, just where the black spot occurs in your animal.

I am fairly confident now that this is a species of Costasiella. I've even taken the plunge and made a separate page for it. Would you agree?
Bill Rudman.

Rudman, W.B., 2000 (Feb 29). Comment on Re: Aeolid? Janolus? Stiliger? from Sulawesi by C. Carlson & P.J. Hoff. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/1989

Factsheet

Costasiella? sp. 2.

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