About the Authors
Department of Biology, The University of Western Ontario, London, Ontario, Canada
Department of Natural History, Royal Ontario Museum, Toronto, Ontario, Canada
Department of Earth Sciences, The University of Western Ontario, London, Ontario, Canada
The authors have declared that no competing interests exist.
Conceived and designed the experiments: EEF LPM JLE FJL MBF. Performed the experiments: EEF. Analyzed the data: EEF LPM. Contributed reagents/materials/analysis tools: EEF LPM JLE FJL. Wrote the paper: EEF.