1. Department of Biology, Pennsylvania State University, Shenango Campus, Sharon, Pennsylvania 16146, U.S.A. (e-mail: )
2. Department of Biology, Whittier College, Whittier, California 90608, U.S.A. (e-mail )
3. Laboratoire d'Herpétologie, Départment de Bíologie, Centre de Recherche en Sciences Naturelles Lwiro, Democratic Republic of Congo (e-mail: )
4. Department of Biological Sciences, University of Texas at El Paso, El Paso, Texas 79968, U.S.A. (e-mail: )