May 26, 2007
From: Bruce Wilkie
Concerning message #19930:
Here is another Siraius immonda for the Forum.
I found this one on the same day that Gary's original message was posted.
Locality: Flat rock, Point lookout, Nth Stradbroke island, 9 metres, Queensland, Australia. , Pacific ocean., 21 May 2007, Rocky reef, hard and soft corals, sponger. Length: 25 mm. Photographer: Bruce Wilkie.
firstname.lastname@example.orgWilkie, B, 2007 (May 26) Re: Siraius immonda from sthn Queensland . [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/19953
I haven't seen such a red specimen before. As soon as I saw your photo it reminded me of Halgerda rubicunda Baba 1949, which has long puzzled me as it does not appear to be a species of Halgerda. In Baba's original description he published two paintings, one with Halgerda-like ridges and the other with tubercles [see image alongside Pl. 25, figs 94-5]. He describes the mantle as having 'finely reticulate ridges with distinct knobs at the points'.
Although there are appear to be some differences in the denticulation of the outer radular teeth, I wouldn't be at all surprised if Halgerda rubicunda turns out to be another synonym of Siraius immonda.
Baba, K (1949) Opisthobranchia of Sagami Bay collected by His Majesty The Emperor of Japan. Iwanami Shoyen, Tokyo. 194pp
Siraius immonda? from the Red Sea
From: Erwin Koehler, September 23, 2008
Re: Siraius immonda from sthn Queensland
From: Gary Cobb, May 25, 2007
Siraius immonda from sthn Queensland
From: Gary Cobb, May 21, 2007
Siraius immonda from Japan
From: Yasuhiro Shirai, April 18, 2000