Elysia trisinuata - variation

September 5, 2002
From: Nishina Masayoshi

Dear Bill,
You mentioned the characteristic 3 folds on the parapodia which cannot be easily seen in the photos of Elysia trisinuata that I posted in an earlier message.

I have been wondering the same thing, And I had a chance to take a several photos of
several individuals. It seems E. trisinuata look different when they are shortened and extended. The 3 folds, can only be seen at certain angles. I also noticed that they have many fine vermilion specks scattered on the surface of the body. These are clearly visible in upper right photo. I have sent a photo showing E. trisinuata and its egg mass in a separate message.

Date: 16 Aug 2002
Loc: Echizen coast, Fukui prif. Japan
Lengh: 10mm to 15mm
Depth: 4m
Water temp: 28C degree
Photo M. Nishina

Best Regards,
Nishina Masayoshi

nishina@wips.co.jp

Masayoshi, N., 2002 (Sep 5) Elysia trisinuata - variation. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/7857

Thanks Nishina,
I have included a closeup here to show the reddish vermilion spots you mentioned. It reminds me quite a lot of Elysia maoria, but that species doesn't have the distinctive 3 folds.
Best wishes,
Bill Rudman

Rudman, W.B., 2002 (Sep 5). Comment on Elysia trisinuata - variation by Nishina Masayoshi. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/7857

Factsheet

Elysia trisinuata

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