The Origin of Animal Body Plans: Recent fossil finds and new insights into animal development are providing fresh perspectives on the riddle of the explosion of animals during the Early Cambrian
D. Erwin, J. Valentine, D. Jablonski March-April 1997 American Scientist
This article concerns the origins of 'key innovations' and 'evolutionary novelties', or the evolution of animal form. The authors discuss the evidence from the fossil record and the developmental genetic sequences of animals in order to decipher the history of taxonomic divergence.
