Evolution of segmentation: rolling back the clock

Curr Biol. 2003 Sep 16;13(18):R708-10. doi: 10.1016/j.cub.2003.08.045.


Recent work has revealed striking similarities in the genetic mechanisms underpinning somitogenesis in zebrafish and segmentation in the spider. Could this mean that the bilaterian common ancestor was segmented after all?

MeSH terms

  • Animals
  • Biological Evolution*
  • Body Patterning*
  • Embryo, Nonmammalian / embryology*
  • Models, Biological
  • Phylogeny
  • Somites / metabolism*
  • Spiders / embryology*
  • Zebrafish / embryology*