1. School of Earth Sciences, University of Bristol, Bristol, U.K.,
2. Key Laboratory of Vertebrate Evolution and Human Origins of Chinese Academy of Sciences, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing, China
3. Museums of Western Colorado, Grand Junction, Colorado, U.S.A.
4. Department of Physical and Environmental Sciences, Colorado Mesa University, Grand Junction, Colorado, U.S.A.
5. College of Osteopathic Medicine of the Pacific and College of Podiatric Medicine, Western University of Health Sciences, Pomona, California, U.S.A.
6. Arizona Museum of Natural History, Mesa, Arizona, U.S.A.