1. Department of Biological Sciences and Museum of Natural History, Auburn University, 101 Life Sciences Building, Auburn, AL 36849, USA
2. Florida Fish and Wildlife Conservation Commission, Fish and Wildlife Research Institute, 7386 Northwest 71st Street, Gainesville, FL 32653, USA
3. Departamento de Zoologia, Universidade Federal do Rio Grande do Sul, Instituto de Biociências, CEP 91501-970, Porto Alegre, Rio Grande do Sul, Brazil