Re: Elysia viridis?

May 1, 2002
From: Peter H. van Bragt

Hello Bill and Erwin,
I would like to post an argument in favour of Erwin's Elysia sp. NOT being E. viridis. The egg mass that Erwin has photographed is very different of the egg masses that we always find in the close proximities of E. viridis in the Dutch coastal waters. Here it is never such a nicely spiraled coil but a very loose ribbon hanging in or on various species of seaweed.I have included a picture of such an egg mass that was photographed in August 2001 in the Oosterschelde Bay, the Netherlands.
Best regards
Peter H. van Bragt

vanbragt.phjm@hsbrabant.nl

van Bragt,P.H., 2002 (May 1) Re: Elysia viridis?. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/5335

Thanks Peter,
The other difference is the size of the eggs. In Erwin's photo they are very large, suggesting direct development, while in your photo the eggs are small, matching the planktotrophic larval stage know to occur in E. viridis. Unfortunately this still leaves Erwin's photo unidentified.
Best wishes,
Bill Rudman.

Rudman,W.B., 2002 (May 1). Comment on Re: Elysia viridis? by Peter H. van Bragt. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/5335

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