Elysia sp. 11 from Sulawesi

June 26, 2001
From: Lindsay Warren

Dear Bill
On looking at Erwin Koehler's photo photo of an Elysia from the Philippines that you posted recently it reminded me of various specimens found in the Tukang Besi Archipelago, S.E. Sulawesi (Operation
Wallacea) to which we gave the temporary 'name' of OWN99. I have attached three photos of different specimens (OS0567 (Size: 16mm), OS0469 (Size: 4mm) & OS01022 (Size: 20 mm) all of which have thin parapodia with a thin intermittent black line along the edge followed by a thin intermittent white line and then a wider intermittent orange band. All resembled Elysia ornata except that the lines on the parapodia were incomplete and the overall colour considerably paler than other Elysia ornata specimens we have found. However, the most distinctive external differences were the very thick parapodia of Elysia sp. 11 which did not have a any black lines. Photos: Lindsay Warren.

When recently reading Carlson & Hoff (1978) I found that they mentioned that the parapodial lines on Elysia ornata could either be continuous or intermittent. So it may well be that OWN99 and Erwin Koehler's Elysia are in fact Elysia ornata although I know one cannot go by external features only.

• Carlson, C.H. & Hoff, P.J., (1978) The Identifiable Elysia from Guam (Elysiidae, Sacoglossa, Opisthobranchia). Micronesica, 14(1): 89-113.

All the best
Lindsay

alldcl@compuserve.com

Warren, L., 2001 (Jun 26) Elysia sp. 11 from Sulawesi. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/4658

Thanks Lindsay,
There are certainly colour similarities but the parapodia of Elysia ornata are large and very thin. I would be very surprised if Elysia sp. 11 turned out to be Elysia ornata.
Best wishes,
Bill Rudman

Rudman, W.B., 2001 (Jun 26). Comment on Elysia sp. 11 from Sulawesi by Lindsay Warren . [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/4658

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