About the Authors

Christopher James Clark

cclark@ucr.edu

Current address: Department of Biology, University of California Riverside, Riverside, California, United States of America

Affiliations Museum of Vertebrate Zoology, University of California, Berkeley, California, United States of America, Peabody Museum of Natural History, Yale University, New Haven, Connecticut, United States of America

Competing Interests

The author has declared that no competing interests exist.

Author Contributions

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