About the Authors

Robert W. Boessenecker

robert.boessenecker@otago.ac.nz

Affiliations Department of Geology, University of Otago, Dunedin, Otago, New Zealand, University of California Museum of Paleontology, Berkeley, California, United States of America

Morgan Churchill

Affiliations Department of Geology and Geophysics, University of Wyoming, Laramie, Wyoming, United States of America, Program in Ecology, University of Wyoming, Laramie, Wyoming, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

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