About the Authors
Section of Integrative Biology, University of Texas, Austin, Texas, United States of America
Department of Philosophy, University of Texas, Austin, Texas, United States of America
Instituto de Biología, Universidad Nacional Autónoma de México, México City, México
The authors have declared that no competing interests exist.
Conceived and designed the experiments: SS. Performed the experiments: SS SES DMF. Analyzed the data: SS SES DMF CLR BS VSC. Contributed reagents/materials/analysis tools: SS SES DMF. Wrote the paper: SS SES DMF.