March 5, 2000
From: Bernard Picton
Here is another Halgerda. It is a picture of H. carlsoni from Pemba Is., Tanzania in February 1999, with a close-up of the speckled orange pattern of spots.
firstname.lastname@example.orgPicton, B., 2000 (Mar 5) Halgerda carlsoni from East Africa. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/2015
I had previously thought of this species as a Western Pacific animal. I am not sure how important the colour of the gills and rhinophores are in this species but in western Pacific H. carlsoni the gills and rhinophores are white with small black spots and some traces of a line along the gill rachis. In your animal there seems to be a black line up the posterior side of the rhinophore stalk and black bands up each side of the club. The gills have no spots but a heavy black line along the rachis. Whether these differences are important or not will obviously need some more information on colour variation in the species and anatomical infomation.
A species identified in Sea Slugs of Western Australia [Fig 129] as Halgerda cf. carlsoni [and elevated to Halgerda carlsoni in Debelius's book], differs in having no fine orange spots and having a black rhinophore club and black-lined gills.
Re: Halgerda carlsoni from East Africa
From: Sully et Monika Bachel, February 10, 2009
Halgerda carlsoni from Philippines
From: Marcel Tanke, October 1, 2008
Halgerda carlsoni from Malaysia
From: Francis & Pirjo Pellet, August 8, 2003
Halgerda carlsoni from Fiji
From: Mary Jane Adams, June 26, 2003
Halgerda carlsoni from Sulawesi
From: Mary Jane Adams, September 5, 2001
Tonga Records: Halgerda carlsoni
From: Don Barclay, May 29, 2001
Halgerda carlsoni from South Africa
From: Valda Fraser, March 7, 2001