Chromodoris willani laying eggs in the Philippines

August 7, 2007
From: Mike Krampf


I thought you might find these pictures interesting.

Locality: Puerto Galera, 85 ft, Mindoro Island, Phillipines, Batangas Sea, 22 February 2007, Sand and coral rubble. Length: 4 cm. Photographer: Mike Krampf.

Cheers,
Mike

mtkrampf@yahoo.com

Krampf, M., 2007 (Aug 7) Chromodoris willani laying eggs in the Philippines. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/20399

Dear Mike,
They are indeed interesting. It has become important to know what type of egg mass each species of Chromodoris is producing because Nerida Wilson's work is suggesting that those which lay a flat egg ribbon form a separate branch within the chromodorids distinct from other species we at present call Chromodoris. This is supported by recently published work on their feeding (Rudman & Bergquist, 2007) which shows that this flat egg group feed on quite different sponges from the rest of the species of Chromodoris. All we know about the egg ribbon of Chromodoris willani is from Nick Gill's message #5711. While I have no reason not to believe him, it is always more satisfying to have an illustration to confirm the identification. I must say this animal is making a bit of a mess laying the ribbon but it certainly seems to be a flat ribbon,

  • Rudman, W.B. & Bergquist, P.R. (2007) A Review of feeding specificity in the sponge-feeding Chromodorididae (Nudibranchia: Mollusca). Molluscan Research, 27: 60-88
  • Wilson, N. G. (2002). Egg masses of chromodorid nudibranchs (Mollusca: Gastropoda: Opisthobranchia). Malacologia, 44(2): 289-305
  • Wilson, N. G. and Lee, M. S. Y. (2005) Molecular phylogeny of Chromodoris (Mollusca, Nudibranchia) and the identification of a planar spawning clade. Molecular Phylogenetics and Evolution 36: 722-727.

Best wishes,
Bill Rudman

Rudman, W.B., 2007 (Aug 7). Comment on Chromodoris willani laying eggs in the Philippines by Mike Krampf. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/20399

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