About the Authors

Jorge Velez-Juarbe

velezjuarbe@gmail.com

Affiliations Laboratory of Evolutionary Biology, Department of Anatomy, Howard University, Washington, D.C., United States of America, Department of Paleobiology, National Museum of Natural History, Smithsonian Institution, Washington, D.C., United States of America

Daryl P. Domning

Affiliations Laboratory of Evolutionary Biology, Department of Anatomy, Howard University, Washington, D.C., United States of America, Department of Paleobiology, National Museum of Natural History, Smithsonian Institution, Washington, D.C., United States of America

Nicholas D. Pyenson

Affiliations Department of Paleobiology, National Museum of Natural History, Smithsonian Institution, Washington, D.C., United States of America, Departments of Mammalogy and Paleontology, Burke Museum of Natural History and Culture, University of Washington, Seattle, Washington, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: JVJ NDP DPD. Performed the experiments: JVJ. Analyzed the data: JVJ NDP DPD. Wrote the paper: JVJ NDP DPD.