Re: Closer look at Pteraeolidia ianthina's head

June 3, 2006
From: Carol Yin

Concerning message #15742:

Hello, Bill,

Does this Pteraeolidia ianthina have four rhinophores??

Locality: Hairball, 30 ft, N. Sulawesi, Indonesia, N. Sulawesi. Length: 7 inches. Photographer: Carol Yin.

Thank you :).
Carol Yin

carolyin@yahoo.com

Yin, C., 2006 (Jun 3) Re: Closer look at Pteraeolidia ianthina's head. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/16758

Dear Carol,
It does indeed. Sometimes if the animal sustains an injury, then mistakes can occur during regrowth, but it looks to me that something went wrong during its development. I'll add it to the page on abnormal development.

One other interesting thing is the very pale uniform colour of this animal. Pteraeolidia keeps microscopic plants alive in its body [see solar powered sea slugs] and usually they give the animal a darker colour than this. In the close up of some of the cerata I can see no sign of the plants, which appear as small brown specks, so it is possible its pale colour is because it has lost its symbiotic plants.
Best wishes,
Bill Rudman

Rudman, W.B., 2006 (Jun 3). Comment on Re: Closer look at Pteraeolidia ianthina's head by Carol Yin. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/16758

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