Re: Eubranchus olivaceus?

May 30, 2003
From: Alan Shepard

NOTE added 14 July 2003: Following Jeff Goddard's message suggesting that E. olivaceus is a synonym of Eubranchus rupium, I have re-identified these east coast animals as E. rupium. - Bill Rudman

Bill -
Thanks for the information and comments concerning the photo of Eubranchus olivaceus or 'Aeolis despecta'. You asked when I had observed the creature in question. The photo was taken on May 4, 2003. I had also observed the same nudibranch in early April, 2002. I have to agree the nudibranch I photographed does indeed match the color plate from Gould.

Thanks for all the research you did on the this.
Alan Shepard
Tolland, CT, USA

Shepard, A., 2003 (May 30) Re: Eubranchus olivaceus?. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

Thanks Alan,
Just to clarify. The name Gould used - Aeolis despecta - is not available for this animal. Gould identified his animals with an animal from the UK which Johnstone had named Aeolis despecta but is now considered a synonym of Tergipes tergipes. One possibility is that your animal is a very large Tergipes tergipes, but if so, it is certainly much larger than European animals. Otherwise it probably needs a new name. But first its teeth need to be looked at so we have some idea what family it belongs to.
Bill Rudman

Rudman, W.B., 2003 (May 30). Comment on Re: Eubranchus olivaceus? by Alan Shepard. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from


Eubranchus rupium

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