About the Authors

Elizabeth A. Freedman Fowler

eafreedman@gmail.com

Affiliations Museum of the Rockies, Montana State University, Bozeman, Montana, United States of America, Department of Earth Sciences, Montana State University, Bozeman, Montana, United States of America

John R. Horner

Affiliations Museum of the Rockies, Montana State University, Bozeman, Montana, United States of America, Department of Earth Sciences, Montana State University, Bozeman, Montana, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

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