1. Integrative Research Center, Field Museum of Natural History, 1400 S Lake Shore Drive, Chicago, Illinois 60605, USA
2. Department of Ecology and Evolutionary Biology, University of Toronto, 25 Willcocks Street, Toronto, Ontario M5S 3B2, Canada
3. Department of Earth Sciences, The University of Western Ontario, 1151 Richmond Street, London, Ontario N6A 5B7, Canada
4. Department of Earth Sciences, University of Toronto, 22 Russell Street, Toronto, Ontario M5S 3B1, Canada
5. Dipartimento di Scienze Biologiche, Geologiche e Ambientali, Alma Mater Studiorum, Università di Bologna, Via Zamboni 67, 40126 Bologna, Italy
6. University of California Museum of Paleontology, 1101 Valley Life Sciences, Berkeley, California 94720-4780, USA
7. Department of Earth Sciences, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario K1S 5B6, Canada
8. Royal Ontario Museum, 100 Queen’s Park, Toronto, Ontario M5S 2C6, Canada