Re: Metaruncina setoensis - external shell?

July 30, 2003
From: Jun Imamoto

Dear Bill.
Thank you for your comment. I attach an additional image. The white thing may be a shell.

26 Jul 2003
Manazuru-coast Sagami Bay, Japan
size about: 4mm
depth: 0.3m (Intertidal)
temperature:24 C

Best Regards,
Jun Imamoto

imamoto@umiushi.info

Imamoto. J., 2003 (Jul 30) Re: Metaruncina setoensis - external shell?. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/10594

Dear Jun,
Thanks for the photo. It certainly looks like a shell. We really need to know whether the 'shell' is covered by the skin or exposed. If it is exposed then either the shell of Metaruncina setoensis is sometimes internal and sometimes external, or else this animal is not Metaruncina setoensis but perhaps a species of Ildica, the genus Bergh described for Ildica nana, an animal with an external shell. The shape of the radular teeth should certainly be one way of determining whether it is M. setoensis.
Best wishes,
Bill Rudman

Rudman, W.B., 2003 (Jul 30). Comment on Re: Metaruncina setoensis - external shell? by Jun Imamoto. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/10594

Factsheet

Metaruncina setoensis

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