Spurilla? from Japan

March 14, 2000
From: Satoru Hori


Dear Bill,
I attached 2 image files.
I think they are Aeolidiella indica.
But I have no confidence. Would you identify them for me?

They were found under a stone in a tidepool in Miura Peninsula, Japan.

Length of white one is 5mm and that of light brown one is 20mm. Light brown one eats sea anemones.

Best regards,
Satoru Hori.

ik8s-hr@asahi-net.or.jp

Hori, S., 2000 (Mar 14) Spurilla? from Japan. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/2085

Dear Satoru,
Eating sea anemones definitely suggests that your animal is a member of the family Aeolidiidae. However from its shape I am pretty sure that it is not Aeolidiella indica.

It looks very like a species of Spurilla and almost identical to Constantine Mifsud's photo of Spurilla neapolitana from the Mediterranean. S. neapolitana has also been recorded from Hawaii and the East Pacific so it is probable that it is been spread artificially. Unfortunately I can't see the shape of the rhinophores in your photos. If you could scan a closeup of the head region for me I could check whether the rhinophores are smooth, lamellate or papillate.

Best wishes,
Bill Rudman.

Rudman, W.B., 2000 (Mar 14). Comment on Spurilla? from Japan by Satoru Hori. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/2085

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