November 19, 1999
From: Valda Fraser
Thank you for your reply. You are right in saying that the specimen is not Halgerda formosa which is very common in our area. I am afraid that my identification of Halgerda formosa is not correct. Please confirm that the photo which I am attaching is Halgerda formosa because it seems to be very different in colouration and body texture from the image of Halgerda toliara.
Locality: South Coast KwaZulu-Natal, SOUTH AFRICA. Near Port Shepstone. Rocky reef - 20m., October 1999. Size: 50mm
firstname.lastname@example.orgFraser, V., 1999 (Nov 19) Halgerda dichromis? from South Africa. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/1541
The plot thickens! This photo is not H. formosa and certainly not H. toliara. It looks something like a badly striped Halgerda willeyi but I think the most likely identification is another new species described by Fahey & Gosliner, Halgerda dichromis. It is the animal figured in Gosliner, 1987 p.69 [no.89] and misidentified as H. formosa. Your photo differs in having much shorter black lines than in Gosliner's photo but as they had only one specimen, it will need more specimens to be sure just how variable the colour pattern of the species is. You say this is common in your area. Perhaps you could send some more photos showing the range of any colour variation.
I would welcome any thoughts from Shireen Fahey & Terry Gosliner.
Colour forms of Halgerda dichromis mating
From: Valda Fraser, March 31, 2009
Halgerda toliara? from Madagascar
From: Leif Abrell, January 20, 2001
Halgerda dichromis? from South Africa
From: Valda Fraser, August 8, 2000
A variety of Halgerda dichromis?
From: Valda Fraser, July 10, 2000
Halgerda dichromis from South Africa
From: Valda Fraser, March 12, 2000
Re: Halgerda dichromis
From: Valda Fraser, December 1, 1999
Colour variation in Halgerda dichromis
From: Valda Fraser, November 24, 1999