1. Department of Evolution, Ecology, and Organismal Biology, The Ohio State University at Marion, 1459 Mount Vernon Avenue, Marion, OH 43302 (United States) and Research Associate, Section of Vertebrate Paleontology, Carnegie Museum of Natural History 4
2. Research Associate, Section of Vertebrate Paleontology, Carnegie Museum of Natural History 4400 Forbes Avenue, Pittsburgh, PA 15213 (United States) and Department of Geosciences, University of Arizona, Tucson, AZ 85721 (United States)
3. John Day Fossil Beds National Monument, US National Park Service, 32651 Highway 19, Kimberly, OR 97848 (United States) and Department of Earth Sciences, University of Oregon, 1272 University of Oregon, Eugene, OR 97403 (United States)
4. 3971 Hoover Road #52, Grove City, OH 43123 (United States)