Colour variation in Siphopteron quadrispinosum

January 19, 2004
From: Nils Anthes

Dear Bill,
Thanks for your comments on Siphopteron quadrispinosum [= Siphopteron spec 3]. Here are some more photos showing some more of the colour variation we found here [Lizard Island, Queensland, Australia - Jan 2004] . Overall, colouration is very constant, but the presence of the various red stripes all over the body varies quite a bit. Concerning the food resource: we tried feeding them the small acoel flatworms that are eaten by Chelidonura sandrana and C. hirundinina but they totally ignored them. The same applies to Siphopteron spec 5, so until now we unfortunately cannot solve the question of what this group feed on.
Best wishes

Anthes, N., 2004 (Jan 19) Colour variation in Siphopteron quadrispinosum. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

Thanks Nils,
These photos certainly cover a good range of variation. It would be good to see if Hawaiian animals show any variation. I'm sorry you couldn't tempt your animals to eat. I am sure we will be lucky one day.
Best wishes

Related messages

  1. Re: Siphopteron sp. from the Andaman Sea
    From: Lawrence Neal, May 14, 2010
  2. Research on mating behaviour in Siphopteron
    From: Rolanda Lange, May 14, 2009
  3. Cephalaspid mating behaviour
    From: Nils Anthes, April 16, 2008
  4. Siphopteron quadrispinosum from Red Sea
    From: Nils Anthes, April 15, 2008
  5. Re: Siphopteron quadrispinosum & S. leah
    From: Terry Gosliner, January 19, 2004
  6. Siphopteron quadrispinosum from New Caledonia
    From: Bill Rudman, January 16, 2004
  7. Radula of Siphopteron quadrispinosum from Koumac
    From: Bill Rudman, January 16, 2004
  8. Siphopteron quadrispinosum & S. leah
    From: Bill Rudman, January 16, 2004
  9. Siphopteron sp. 3? from Great Barrier Reef
    From: Nils Anthes, January 14, 2004
  10. Is this Siphopteron quadrispinosum?
    From: Nishina Masayoshi, May 27, 2002
  11. Re: Mystery from Hawaii
    From: Scott Johnson, August 26, 2001
  12. Mystery from Hawaii
    From: David Kearnes, August 25, 2001

Show factsheet and all related messages