About the Authors
Section of Integrative Biology, The University of Texas at Austin, Austin, Texas, United States of America
Department of Entomology, Smithsonian Institution, Washington, D. C., United States of America
Center for the Study of Social Insects, São Paulo State University, Rio Claro, São Paulo, Brazil
The authors have declared that no competing interests exist.
Conceived and designed the experiments: SES. Performed the experiments: SES JMJ GGV. Analyzed the data: SES. Contributed reagents/materials/analysis tools: MBJ UGM. Wrote the paper: SES MBJ UGM.