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.

Full text available online

This resource is referenced here:
Subject: Geoscience:Geology:Sedimentary Geology:Stratigraphy, Geoscience:Geology:Igneous and Metamorphic Petrology:Igneous Rocks
Resource Type: Scientific Resources:Overview/Reference Work, Research Results, Journal Article