Colour variation in Halgerda wasinensis

July 5, 2005
From: Colin Ogden

Hi Bill,
The more I learn about nudibranchs the more fascinated I become, and also the more confused I get by all their variations. I have three photos here of what I believe are Halgerda wasinensis, and they all have marked differences which I have noticed on this species before.
Upper right: shows definite white areas surrounding the black inside the yellow ridges.
Lower left: shows no black spots on the edge of the mantle, and a marked difference in the pattern of the ridges. Also the gills do not appear to end in "feathers" as in the other 2 photos. The black markings on the gills are definitely more pronounced than on the other 2 animals.
Lower right: shows definite white spots where the yellow ridges meet. All these photos are from the same area. I see there has already been some discussion on the variations found in this species. I hope my observations can contribute.

Locality: Sodwana Bay, South Africa, Indian Ocean. Depth: 22 to 26 metres
Length: 50 to 55 mm. 02 July 2005. Coral reef. Photographer: Colin Ogden

Regards,
Colin

scubaco@iafrica.com

Ogden C M, 2005 (Jul 5) Colour variation in Halgerda wasinensis. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/14189

Dear Colin,
It's a while since we've had any problematic Halgerda photos on the Forum but I think your lower left photo is not H. wasinensis. The yellow border to the mantle and the foot seems quite distinctive. Perhaps Shireen Fahey or Terry Gosliner can give us a clue
Best wishes,
Bill Rudman

Rudman, W.B., 2005 (Jul 5). Comment on Colour variation in Halgerda wasinensis by Colin Ogden. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/14189

Factsheet

Halgerda wasinensis

Related messages

  1. Halgerda wasinensis? from Sodwana Bay
    From: Colin Ogden, October 21, 2008
  2. Unknown Halgerda
    From: Valda Fraser, April 29, 2008
  3. Halgerda wasinensis ? from Mozambique
    From: David Abecasis, March 31, 2008
  4. Re: More Halgerda wasinensis pics from Mozambique.
    From: Natasja Vandeperre, August 10, 2007
  5. Are these Halgerda formosa?
    From: Pasquale Pascullo, March 4, 2006
  6. Halgerda sp from Zanzibar
    From: Wilhelm van Zyl, November 11, 2005
  7. Mating Halgerda wasinensis from Mozambique
    From: Riaan Marx, March 1, 2005
  8. More Halgerda wasinensis pics from Mozambique.
    From: Riaan Marx, March 1, 2005
  9. Re: Halgerda wasinensis? from East Timor
    From: Nick Hobgood, March 19, 2004
  10. Halgerda wasinensis? from East Timor
    From: Nick Hobgood, March 17, 2004
  11. Halgerda wasinensis from NE South Africa
    From: Charles Rowe, February 13, 2004
  12. Halgerda formosa identity
    From: Shireen Fahey, January 7, 2004
  13. Halgerda wasinensis from Kenya
    From: Gavin Bushell, January 7, 2004
  14. Halgerda wasinensis - colour variation
    From: Bill Rudman, January 7, 2004
  15. Halgerda formosa? from Mayotte
    From: Marina Poddubetskaia, November 26, 2003
  16. Halgerda wasinensis from South Africa
    From: Riaan Marx, April 14, 2003
  17. Halgerda formosa and H. punctata
    From: Danny Van Belle, January 28, 2003
  18. Halgerda toliara or H. formosa from Madagascar
    From: Lindsay Warren, September 18, 2002
  19. Halgerda wasinensis from Christmas Island
    From: W.B. Rudman, May 3, 2002
  20. Halgerda wasinensis from South Africa
    From: Valda Fraser, September 3, 2000
  21. Re: Nudibranch from Mozambique
    From: Vincent Tomeno, May 24, 2000
  22. Re: Jorunna? or Halgerda? from Mozambique
    From: Vincent Tomeno, May 20, 2000
  23. Jorunna? or Halgerda? from Mozambique
    From: Vincent Tomeno, May 19, 2000
  24. Jorunna from Mozambique
    From: Vincent Tomeno, May 18, 2000
  25. Halgerda formosa? from East Africa
    From: Bernard Picton , March 9, 2000
  26. Name Change of Halgerda punctata
    From: Ernest C.J. Seamark, November 18, 1999
  27. Halgerda punctata from South Africa
    From: Ernest C.J. Seamark, July 20, 1999

Show factsheet and all related messages