1. 1Department of Organismal Biology, University of Chicago
2. Committee on Evolutionary Biology, University of Chicago
3. Intellectual Ventures
4. Royal Tyrrell Museum of Palaeontology
5. Department of Biology, West Chester University
6. Grupo de Biología Evolutiva, UNED
7. Department of Earth Sciences, University of Southern California
8. Dinosaur Institute, Natural History Museum of Los Angeles County