1. Division of Biosciences, University College London, London, UK
2. Department of Life Sciences, The Natural History Museum, London SW7 5BD, UK
3. Department of Biology, Utah State University, Logan, UT 84322, USA
4. Department of Vertebrate Zoology, National Museum of Natural History, Smithsonian Institution, Washington, DC 20560-0162, USA
5. Imaging and Analysis Centre, The Natural History Museum, London SW7 5BD, UK
6. Department of Herpetology, California Academy of Sciences, San Francisco, CA 94118, USA
7. Department of Biology and Centre for Vision Research, York University, Toronto, Ontario, Canada
8. Department of Biology, Amphibian and Reptile Diversity Research Center, The University of Texas at Arlington, Arlington, TX 76019, USA