Re: Piseinotecus gabinieri - rings on rhinophores

May 2, 2008
From: Dominique Horst


Concerning message #20009:

Hi Bill,

We found today two individuals, both at the same place. They showed different states of rings. May be this is related to different development steps? The second [lower photos] could be more juvenile?

Locality: Antibes, 8 m, France, Mediterranean Sea, 30 March 2008. Length: 15 mm. Photographer: Dominique Horst.

Kind regards,
Dominique

dominique.horst@wanadoo.fr

Horst, D., 2008 (May 2) Re: Piseinotecus gabinieri - rings on rhinophores. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/21485

Dear Dom,

I have no experience with this species, but in general, rhinophoral ornamentation like this does develop gradually as an animal grows in size. The other thing which changes the 'look' of the ridges is the degree the rhinophore is extended or contracted. Although not exactly like an accordion, the ridges are probably much more noticeable when the rhinophores are slightly contracted. I guess the first thing to do would be to gently touch the tips of some rhinophores and see if the ridges do become more obvious. And the the other thing would be to look at a series of animals of different lengths and see if a pattern emerged.

Best wishes,
Bill Rudman

Rudman, W.B., 2008 (May 2). Comment on Re: Piseinotecus gabinieri - rings on rhinophores by Dominique Horst. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/21485

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Piseinotecus gabinierei

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