Japanese Protaeolidia juliae? (with a stripe)

September 23, 2001
From: Yasuhiro Shirai


Dear Bill,
To accompany my other message here are two images of an animal that is called Protaeolidiella juliae in Japanese guide books. They have white line on their back. I took photo at Wakayama, Kushimoto Prefecture, central Japan.

UPPER: June 18, 2000.
Length about 50mm. (An adult).
Depth 16m.
Water temperature 22 degree.

LOWER: July 19, 2000.
Length about 15mm.
Depth 17m.
Water temperature 23 degree.

Best wishes,
Yasuhiro Shirai

yasuhiro@e-net.or.jp

Shirai, Y., 2001 (Sep 23) Japanese Protaeolidia juliae? (with a stripe). [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/5303

Dear Yasuhiro,
Thanks again for sending these photos. The only consistent difference I can find between P. juliae and P. atra is that P. juliae is said to have a white stripe down the dorsal midline. As far as I can determine this white-striped form is the colour form found throughout the Indo-West Pacific. The P. atra colour form, without a stripe seems to be found only in Japan. If anyone has a photo of an animal without a white stripe from somewhere other than Japan, I would be very interested to know about it. Ironically P. juliae was described from a preserved animal so we do not know if it had a white stripe or not.
Best wishes,
Bill Rudman

Rudman, W.B., 2001 (Sep 23). Comment on Japanese Protaeolidia juliae? (with a stripe) by Yasuhiro Shirai. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/5303

Factsheet

Protaeolidiella atra

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