Polycera quadrilineata from Portugal

March 2, 2004
From: Joao Pedro Silva

Dear Bill,
Last weekend I came accross this nudibranch which I think is Polycera quadrilineata. At first I thought it was Trapania tartanella, which I have seen previously in Baleal, Portugal, but then I noticed the yellow stripes on the body and these didn't match my previous sighting.
Could you confirm this?
All the best,

Joao Pedro
http://uwphoto.no.sapo.pt

jpsilva@uwphotographer.net

Silva, J.P., 2004 (Mar 2) Polycera quadrilineata from Portugal. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/12351

Dear Joao Pedro,
Yes this is Polycera quadrilineata. Your lower two photos show how transparent this animal can be. The curved brown tube you can see is the intestine full of waste material. It leads back to the anus which opens in the centre of the gills. JUst in fromt of the intestine you can see two small black specks, which are the eyes. The large white mass in front of the eyes is the muscular buccal bulb which contains the ribbon of radular teeth used to 'bite off' pieces of food.
Best wishes
Bill Rudman

Rudman, W.B., 2004 (Mar 2). Comment on Polycera quadrilineata from Portugal by Joao Pedro Silva. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/12351

Factsheet

Polycera quadrilineata

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