Jorunna parva f rom Japan

September 8, 2001
From: Nishina Masayoshi


Dear Dr.Rudman,
Here are photos of Jorunna parva. However one of the rhinophores is not perfect.

Date: 12 Aug 2001
Location: Echizen beach, Japan
Depth: 5m
Length: 15mm
Frequency in Echizen: rare

Best Regards,
Nishina Masayoshi

nishina@hpe15.wips.co.jp

Nishina, M., 2001 (Sep 8) Jorunna parva f rom Japan. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/5079

Dear Nishina,
Thanks for these photos. This is certainly the animal I have been calling Jorunna sp. 2. As I discuss in Satoru Hori's message, it is a question of whether this is Baba's Thordisa parva. I have seen animals in Australia which match Baba's illustration very well, and as I illustrate on that page, Jorunna sp. 2 ranges from translucent white with scattered black caryophyllidia (the papillae on its back) to forms which are yellow with the black caryophyllidia clustered to form large black spots. Like your animals, there is large black spot on the posterior tip of the foot. It is interesting that both the animal in Satoru Hori's photo and yours have this broad band down the centre of the mantle which is devoid of black caryophyllidia.

It would be nice to find a specimen from Japan that fitted Baba's description a little better.
Best wishes,
Bill Rudman

Rudman, W.B., 2001 (Sep 8). Comment on Jorunna parva f rom Japan by Nishina Masayoshi. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/5079

Factsheet

Jorunna parva?

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