About the Authors
- John R. Wible, Michelle Spaulding
- Section of Mammals, Carnegie Museum of Natural History, Pittsburgh, Pennsylvania, United States of America
The authors have declared that no competing interests exist.
Conceived and designed the experiments: JRW MS. Performed the experiments: JRW MS. Analyzed the data: JRW MS. Contributed reagents/materials/analysis tools: JRW MS. Wrote the paper: JRW MS.