Adalaria proxima from Newfoundland

March 23, 2003
From: Paulette Penton

I am unfamiliar with Dorids and am assuming that this is one. I only found one individual in my sampling and the identification guides were of no use to my untrained ability. Once again, these pics are horrible quality but it is all that I have. This individual was found at the same site as previously mentioned, on a rock.

was found at my sampling area in Bonne Bay, located in Gros Morne National Park in Newfoundland. It was found in July 2002 at 46' with Obelia on a rocky bottom with big boulders and a wall covered with coralline algae.
Paulette Penton

I think this is either Adalaria proxima or the very similar looking Onchidoris muricata. I tend towards Adalaria because the tubercles seem to taper towards the tip, but as oyu will see on the relevant pages, they are very difficult to separate externally. Both feed on encrusting bryozoans, Adalaria proxima preferring Electra pilosa.
Best wishes,
Bill Rudman

Rudman, W.B., 2003 (Mar 23). Comment on Adalaria proxima from Newfoundland by Paulette Penton. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from


Adalaria proxima

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