Origin of animal epithelia: insights from the sponge genome.

  title={Origin of animal epithelia: insights from the sponge genome.},
  author={Bryony Fahey and Bernard M. Degnan},
  journal={Evolution & development},
  volume={12 6},
Epithelial tissues are a key metazoan cell type, providing a basic structural unit for the construction of diverse animal body plans. Historically, an epithelial grade of organization was considered to be restricted to the Eumetazoa, with the majority of cell layers described for Porifera lacking any of the conserved ultrastructural characteristics of epithelia. Now with the use of genomic information from the demosponge, Amphimedon queenslandica, we identify orthologs of bilaterian genes that… CONTINUE READING