September 23, 2001
From: Yasuhiro Shirai
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).
Water temperature 22 degree.
LOWER: July 19, 2000.
Length about 15mm.
Water temperature 23 degree.
email@example.comShirai, 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
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.
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