About the Authors

Scott D. Sampson

ssampson@umnh.utah.edu

Affiliation Utah Museum of Natural History and Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, United States of America

Mark A. Loewen

Affiliation Utah Museum of Natural History and Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, United States of America

Andrew A. Farke

Affiliation Raymond M. Alf Museum of Paleontology, Claremont, California, United States of America

Eric M. Roberts

Affiliation School of Earth and Environmental Science, James Cook University, Townsville, Queensland, Australia

Catherine A. Forster

Affiliation Department of Biological Sciences, George Washington University, Washington, D. C. United States of America

Joshua A. Smith

Affiliation Utah Museum of Natural History and Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, United States of America

Alan L. Titus

Affiliation Grand Staircase-Escalante National Monument, Bureau of Land Management, Kanab, Utah, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: SDS MAL AAF. Performed the experiments: SDS MAL AAF ER CF JS AT. Analyzed the data: SDS MAL AAF ER CF. Wrote the paper: SDS MAL AAF.