Re: Tritonia lineata from Scotland

May 10, 2002
From: Marli Wakeling

Dear Bill,
I am interested in what is the diffence between this animal and Tritonia festiva from the North east Pacific. They appear identical visually.
Marli Wakeling

Wakeling, M., 2002 (May 10) Re: Tritonia lineata from Scotland. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

Dear Marli,
I had a quick flick through the literature and am surprised no one seems to have made the comparison. May be because they are oceans apart no one has thought it very relevant. They certainly have similarities in colour but in T. lineata there is no white line edging the foot, and the white marking on the mantle are restricted to the edge of the mantle and a pair of inner lines which run out to each of the gills. In T. festiva there is a white edge to the foot and the mantle, and there a many more white markings on the mantle in the form of curves, rings, streaks and spots etc.

T. lineata also differs in having only 4 tentacles on the oral veil while T. festiva has up to 10 smaller tentacles. The egg ribbon also seems different with a simple spiral in T. lineata and a folded spiral in T. festiva. As far as anatomical details go I don't think there is enough information available to make a good comparison.
Best wishes,
Bill Rudman

Rudman, W.B., 2002 (May 10). Comment on Re: Tritonia lineata from Scotland by Marli Wakeling. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from


Tritonia lineata

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