About the Authors

Christopher J. Campisano

campisano@asu.edu

Affiliations Institute of Human Origins, Arizona State University, Tempe, Arizona, United States of America, School of Human Evolution and Social Change, Arizona State University, Tempe, Arizona, United States of America

E. Christopher Kirk

Affiliations Department of Anthropology, University of Texas at Austin, Austin, Texas, United States of America, Vertebrate Paleontology Laboratory, Jackson School of Geosciences, University of Texas at Austin, Austin, Texas, United States of America

K. E. Beth Townsend

Affiliation Department of Anatomy, Arizona College of Osteopathic Medicine, Midwestern University, Glendale, Arizona, United States of America

Alan L. Deino

Affiliation Berkeley Geochronology Center, Berkeley, California, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: CJC ECK KET ALD. Performed the experiments: CJC ECK KET ALD. Analyzed the data: CJC ECK KET ALD. Contributed reagents/materials/analysis tools: CJC ECK KET ALD. Wrote the paper: CJC ECK KET ALD.