Mexichromis francoisae from Senegal

June 16, 2005
From: Marina Poddubetskaia

Dear Bill,
Here are some more shots of Mexichromis francoisae from Senegal. This year I saw many animals of this species, while in 2003 I didn't see any.
Please, note the white spots on the posterior part of the mantle of the animal in the lower photo. The first animal has the same spots too. In fact, most of the specimens I saw have these spots, but they are more or less obvious from one animal to another.

Locality: 'Tacoma' (wreck), Dakar, Senegal, Atlantic Ocean. Depth: 10 m.
Upper Photo: Length:  10-11 mm, 08 June 2005   Middle Photo: Length:  17 mm, 30 May 2005. Lower Photo: Length:  15 mm,  30 May 2005  (Inset showing posterior mantle glands).  Photos: Marina Poddubetskaia - Nembro website


Poddubetskaia, M. , 2005 (Jun 16) Mexichromis francoisae from Senegal. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

Dear Marina,
Thanks for photos of this rarely reported species. I have included a close-up of the white spots you mention in the photo alongside. They are the mantle glands. In species of Mexichromis most of the mantle glands are concentrated around the posterior end of the mantle but in from the edge. Your photo clearly shows this and shows another good reason for considering this species a member of the genus Mexichromis rather than genera such as Chromodoris or Hypselodoris which other authors have placed it in previously.
Best wishes,
Bill Rudman

Rudman, W.B., 2005 (Jun 16). Comment on Mexichromis francoisae from Senegal by Marina Poddubetskaia. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

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