title: The early evolution of animals.
authors.affiliation: University of Southern California, USA.
authors.forename: David J
authors.initials: DJ
authors.lastname: Bottjer
mesh_terms: D000715:Anatomy; D000818:Animals; D005075:Biological Evolution; D002681:China; D003063:Cnidaria / Q000033:anatomy & histology; D019143:Evolution, Molecular; D005580:Fossils; D010163:Paleontology; D011161:Porifera / Q000033:anatomy & histology; D013997:Time Factors