Chromodoris or Hypselodoris?

March 26, 2010
From: Franco De Lorenzi

Dear prof. Rudman in my archive I have this Doridae taken in Bunaken. The trasparent notum may represent a juvenile phase.

All that I can say is that I found it in between a zone of coral ending on sand. As always I hope you can help me to know more about it.

Locality: Bunaken - Alban - Night dive, 12 metres, Indonesia, indopacific ocean, 21 august 2007, sand, coral . Length: 13 mm. Photographer: Franco De Lorenzi.

Thanks a lot
Franco

cratena@tiscali.it

Franco De Lorenzi, 2010 (Mar 26) Chromodoris or Hypselodoris?. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/23392

Dear Franco,

I first encountered this little animal when I was revising the Indo-West Pacific species of Hypselodoris and Chromodoris and was pretty sure it was a Chromodoris  and had placed it with a group of similarly coloured species [see C. decora colour group Fact Sheet] which I was planning to dissect as a group. Howevere I was greatly surprised when I dissected it to find its radular teeth were quite different from a chromodorids and its anatomy showed it was a juvenile Hexabranchus sanguineus.

If you look through some of the messages we have of this species on the Forum you will see stages showing its chnage form this colour pattern to the brilliant red and white of the adult Spanish Dancer.

Best wishes,
Bill Rudman

Rudman, W.B., 2010 (Mar 26). Comment on Chromodoris or Hypselodoris? by Franco De Lorenzi. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/23392

Factsheet

Hexabranchus sanguineus

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