Hypselodoris zephyra? from Japan

January 17, 2002
From: Rie Nakano

Dear Dr.Rudman,
This animal was found by Mr.Kotaro Tanaka in Hachijo Is, Japan, in December,2001.
I think this one is Hypselodoris zephyra.
Is that correct?

Length: 25mm
Depth: 12m
On the rock on the bottom.

Rie Nakano

rie@divers.ne.jp

Nakano, R., 2002 (Jan 17) Hypselodoris zephyra? from Japan. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/5900

Note added 21 March 2003: The triangular gills make me think this is probably H. nigrostriata. See message.

Dear Rie,
I think this is H. zephyra but as I have discussed before, I am having difficulty separating that species from H. nigrostriata. I thought H. zephrya had simple gills while H. nigrostriata has gills which were triangular in cross-section. Mr Tanaka's photo shows triangular gills which would make this animal H. nigrostriata. Howvere I need to check whether the gills of H. zephyra are indeed 'simple' or are also triangular. I have discussed this problem in an earlier message but am still not clear how to separate these two species from photos. Sorry I can't give you a definite answer at this time

Best wishes,
Bill Rudman

Rudman, W.B., 2002 (Jan 17). Comment on Hypselodoris zephyra? from Japan by Rie Nakano. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/5900

Factsheet

Hypselodoris nigrostriata

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