1. Curator Emeritus, Section of Vertebrate Paleontology, Carnegie Museum of Natural History 4400 Forbes Avenue, Pittsburgh, Pennsylvania, 15213 bermand@carnegiemnh.org
2. Department of Earth Sciences, Carleton University 1125 Colonel By Drive, Ottawa, Ontario, Canada, K1S 5B6 hillary.maddin@carleton.ca
3. Collection Manager, Section of Vertebrate Paleontology, Carnegie Museum of Natural History 4400 Forbes Avenue, Pittsburgh, Pennsylvania, 15213 henricia@carnegiemnh.org
4. [Research Associate, Section of Vertebrate Paleontology, Carnegie Museum of Natural History] Department of Biology, California State University, 5500 University Parkway, San Bernardino, California, 92407 ssumida@csusb.edu
5. Department of Biology, University of Toronto at Mississauga, m3359 Mississauga Rd, Mississauga, Ontario, L5L 1C6, Canada diane.scott@utoronto.ca
6. [Research Associate, Section of Vertebrate Paleontology, Carnegie Museum of Natural History] Department of Biology, University of Toronto at Mississauga, 3359 Mississauga Rd, Mississauga, Ontario, L5L 1C6, Canada robert.reisz@utoronto.ca