About the Authors

Joel O Wertheim

To whom correspondence should be addressed. wertheim@email.arizona.edu

Affiliation Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, Arizona, United States of America

Michael Worobey

Affiliation Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, Arizona, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

JOW and MW conceived of and designed the experiments, performed the phylogenetic analysis, and wrote the paper. JOW performed the experiments.