About the Authors

Lorna J. O'Brien

lornao@rom.on.ca

Affiliations Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, Ontario, Canada, Palaeobiology division, Department of Natural History, Royal Ontario Museum, Toronto, Ontario, Canada

Jean-Bernard Caron

Affiliations Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, Ontario, Canada, Palaeobiology division, Department of Natural History, Royal Ontario Museum, Toronto, Ontario, Canada

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: LJO JBC. Performed the experiments: LJO JBC. Analyzed the data: LJO JBC. Contributed reagents/materials/analysis tools: LJO JBC. Wrote the paper: LJO JBC.