1. [Research Associate, Section of Vertebrate Paleontology, Carnegie Museum of Natural History] Department of Integrative Anatomical Sciences, University of Southern California, Los Angeles, California 90033 and Research Associate, Vertebrate Paleontolo
2. Natural History Museum of Utah, University of Utah, 301 Wakara Way, Salt Lake City, Utah 84108-1214
3. Department of Vertebrate Paleontology, Sam Noble Oklahoma Museum of Natural History, 2401 Chautauqua Avenue, Norman, Oklahoma 73072 and Department of Geosciences, University of Oklahoma, 100 Boyd Street, Norman, Oklahoma 73069
4. 402 Sierra Vista, Carbondale, Colorado 81623
5. Field Museum of Natural History, 1400 S Lake Shore Drive, Chicago, Illinois 60605
6. Museum of Texas Tech University, 3301 4thStreet, Lubbock, Texas 79415