Barry D. Webby is a senior paleontologist at the Center for Ecostratigraphy & Paleobiology at Macquarie University, Sydney. Florentin Paris is a CNRS research director in geosciences at the University of Rennes, France. Mary L. Droser is a professor in the Department of Earth Science, University of California, Riverside. Ian G. Percival is chief paleontologist at the Geological Survey of New South Wales, Australia.