About the Authors

Robert R. Reisz

robert.reisz@utoronto.ca

Affiliation Department of Biology, University of Toronto Mississauga, Mississauga, Ontario, Canada

Jörg Fröbisch

Affiliations Museum für Naturkunde, Leibniz-Institut für Evolutions- und Biodiversitätsforschung, Berlin, Germany, Institut für Biologie, Humboldt-Universität zu Berlin, Berlin, Germany

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Analyzed the data: RRR JF. Wrote the paper: RRR JF.