About the Authors

Eric G. Ekdale

eekdale@sdnhm.org

Affiliation Department of Paleontology, San Diego Natural History Museum, San Diego, California, United States of America

Annalisa Berta

Affiliation Department of Biology, San Diego State University, San Diego, California, United States of America

Thomas A. Deméré

Affiliation Department of Paleontology, San Diego Natural History Museum, San Diego, California, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: EGE AB TAD. Analyzed the data: EGE AB TAD. Wrote the paper: EGE AB TAD.