1. Evolutionary Studies Institute, University of the Witwatersrand, 1 Jan Smuts Avenue, Johannesburg 2000, South Africa.
2. Oxford University Museum of Natural History, University of Oxford, Parks Road, Oxford OX1 3PW, UK.
3. W.M. Keck Science Department, Claremont McKenna, Scripps, and Pitzer Colleges, 925 N Mills Ave., Claremont, CA 91711, USA.
4. Dinosaur Institute, Los Angeles County Museum of Natural History, 900 Exposition Boulevard, Los Angeles, CA 90007, USA.
5. Division of Paleontology, American Museum of Natural History, Central Park West at 79th Street, New York, NY 10024, USA.
6. Department of Psychological and Brain Sciences, Johns Hopkins University, 3400 North Charles St., Baltimore, MD 21218, USA.
7. Department of Anatomy and Cell Biology, Carver College of Medicine, University of Iowa, 51 Newton Road, 100 Bowen Science Building, Iowa City, IA 52242, USA.
8. Department of Anatomy, College of Graduate Studies, Midwestern University, 19555 N 59th Avenue, Glendale, AZ 85308, USA.
9. Department of Natural Sciences, National Museums Scotland, Chambers Street, Edinburgh EH1 1JF, UK.
10. School of Geosciences, University of Edinburgh, Grant Institute, Hutton Road, Edinburgh EH9 3FE, UK.
11. Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, 142 Xizhimenwai Street, Beijing 100044, China.
12. Chinese Academy of Sciences Center for Excellence in Life and Paleoenvironment, Beijing 100044, China.
13. Department of Biological Sciences, The George Washington University, 2029 G St. NW, Washington, DC 20052, USA.
14. Department of Earth Sciences, University of Oxford, South Parks Road, Oxford OX1 3AN, UK.