1. Department of Biology, University of Florida , Gainesville, FL 32611 , USA
2. Neurobiology-Neurodegeneration and Repair Laboratory, National Eye Institute , Bethesda, MD 20892 , USA
3. Department of Vertebrate Zoology, National Museum of Natural History, Smithsonian Institution , Washington, DC 20560 , USA
4. Department of Biological Sciences and Museum of Natural Science, Louisiana State University , Baton Rouge, LA 70803 , USA and
5. Graduate Program in Ecology, National Institute of Amazonian Research , Manaus, AM , Brazil