Page 272 - Introduction to Paleobiology and The Fossil Record

ORIGIN OF THE METAZOANS 259

Ordovician Biodiversifi cation Event. Nature Geosci- Waggoner, B. 2003. The Ediacara biotas in space and
ence 1, 49–53. time. Integrative Comparative Biology 43, 104–
Seilacher, A. 1989. Vendozoa: organismic construction 13.
in the Proterozoic biosphere. Lethaia 22, 229–39. Wray, G.A., Levinton, J.S. & Shapiro, L.M. 1996.

Seilacher, A., Bose, P.K. & Pflüger, F. 1998. Triploblastic Molecular evidence for deep pre-Cambrian diver-
animals more than 1 billion years ago: trace fossil gences amongst metazoan phyla. Science 214,
evidence from India. Science 282, 80–3. 568–73.
Valentine, J.W. 2004. On the Origin of Phyla. Univer-
sity of Chicago Press, Chicago.