Re: Elysia tomentosa from Ratnagiri, India

May 15, 2009
From: Vishal bhave

Concerning message #22457:

I have observed Elysia tomentosa on other species of Caulerpa which may be C. peltata or C. racemosa (I am bit confused between those two).

First image is of Caulerpa peltata? on which I have seen Elysia tomentosa and other one is of  Caulerpa scalpelliformis.

Locality: Rocky patch, Mandvi, Ratnagiri. Photographer: Vishal Bhave.

Vishal Bhave

vishalbhave@gmail.com

Bhave,V.J., 2009 (May 15) Re: Elysia tomentosa from Ratnagiri, India. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/22465

Thanks Vishal,

At least with the photos anyone who wants to consult an expert has something to show them. As Cynthia noted, you seem to have two 'feather-shaped' species of Caulerpa, and the one in your lower photo here, which Cynthia agrees is C. scalpelliformis, is the one the egg mass was on.

The disc-shaped one in your upper photo again illustrates that nudibranchs are not the only group with taxonomic and nomenclatural problems. It could certainly be Caulerpa peltata, which has also been considered a variety of C. racemosa. To illustrate some of the confusion in the literature there is also another similar looking 'species' which in various books is known as both Caulerpa racemosa var exigua and  Caulerpa peltata var exigua.

Until names are sorted out, good photos like yours are invaluable records.

Best wishes,
Bill Rudman

Rudman, W.B., 2009 (May 15). Comment on Re: Elysia tomentosa from Ratnagiri, India by Vishal bhave. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/22465

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