Pteraeolidia ianthina (?) from Mozambique

September 20, 2007
From: Natasja Vandeperre

Hello Bill,

My closest guess to this one is Pteraeolidia ianthina. But I'm not convinced. On the second picture you can see eggs. Are these from this species?

Locality: Tofo, Mozambique, Indian Ocean, 22 July 2007. Length: 100mm. Photographer: Natasja Vandeperre.

Greetings,
Natasja

postmaster@naaktslakken.be

Vandeperre, N., 2007 (Sep 20) Pteraeolidia ianthina (?) from Mozambique. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/20580

Dear Natasja,

Firstly I couldn't see any eggs in your second photo so I have included a close-up showing the front half of the animal a bit more clearly. This certainly falls into the group I am calling Pteraeolidia ianthina. I am not entirely convinced that all the animals you can see in the Forum messages are one species, but many years ago when I was first interested in solar powered species I dissected a whole range of different coloured animals, some with relatively short cerata like your animal and others with longer cerata, but could find no consistent differences in anatomy or radular morphology. There are names that have been given to different body shapes but there seems little point in using them unless we can define which is which.

Best wishes,
Bill Rudman

Rudman, W.B., 2007 (Sep 20). Comment on Pteraeolidia ianthina (?) from Mozambique by Natasja Vandeperre. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/20580

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