1. Museum of Comparative Zoology and Department of Organismic and Evolutionary Biology Harvard University 26 Oxford Street Cambridge MA 02138 USA
2. Department of Paleobiology, National Museum of Natural History Smithsonian Institution 10th & Constitution Avenue NW Washington DC 20560 USA
3. Sam Noble Museum, University of Oklahoma 2401 Chautauqua Avenue Norman OK 73072 USA
4. School of Geosciences, University of Oklahoma 100 E Boyd Street Norman OK 73019 USA
5. School of Natural Sciences & Mathematics, Stockton University 101 Vera King Farris Dr Galloway NJ 08205 USA