1. Department of Vertebrate Zoology, MRC-116, Smithsonian Institution, Washington, DC 20013-7012, USA
2. Museum Conservation Institute, Smithsonian Institution, Suitland, MD 20746, USA
3. Institute of Natural and Mathematical Sciences, Massey University, Auckland 0632, New Zealand
4. School of Life Sciences, Arizona State University, Tempe, AZ 85287-4501, USA
5. Department of Biology, Lafayette College, Easton, PA 18042-1778, USA
6. Department of Paleobiology, MRC-121, National Museum of Natural History, Smithsonian Institution, Washington, DC 20013-7012, USA