[Research Article] The Cambrian Conundrum: Early Divergence and Later Ecological Success in the Early History of Animals

[Research Article] The Cambrian Conundrum: Early Divergence and Later Ecological Success in the Early History of Animals: Major animal clades evolved tens of millions of years before the widespread appearance of animal fossils.

Authors: Douglas H. Erwin, Marc Laflamme, Sarah M. Tweedt, Erik A. Sperling, Davide Pisani, Kevin J. Peterson