1. Department of Biology, Villanova University, 800 Lancaster Avenue, Villanova, PA 19085, USA
2. Alabama Museum of Natural History, University of Alabama, Box 870340, Tuscaloosa, AL 35487, USA
3. Natural History Museum and Biodiversity Research Center and Department of Ecology and Evolutionary Biology, 1345 Jayhawk Blvd, Dyche Hall, University of Kansas, Lawrence, KS 66045, USA
4. North Carolina Museum of Natural Sciences, 11 West Jones Street, Raleigh, NC 27601, USA
5. Department of Biology, La Sierra University, 4500 Riverwalk Parkway, Riverside, CA 92515, USA
6. Museum of Vertebrate Zoology, University of California, Berkeley, CA 94720, USA
7. Zoologisches Forschungsmuseum Alexander Koenig, Adenauerallee 160, 53113 Bonn, Germany
8. Department of Biology, San Diego State University, San Diego, CA 92182-4614, USA
9. Institute of Evolutionary Biology (CSIC-UPF), 08003 Barcelona, Spain
10. Department of Herpetology and Ichthyology, Muséum d'Histoire Naturelle, C.P. 6434, CH-1211, Genèva 6, Switzerland
11. Division of Herpetology and Ornithology, Zoological Institute, Russian Academy of Sciences, Universitetskaya nab.,1, St Petersburg 199034, Russia
12. Division of Amphibians and Reptiles, The Field Museum of Natural History, Chicago, IL, USA