1 Key Laboratory of Vertebrate Evolution and Human Origins of Chinese Academy of Sciences, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing 100044, China. Electronic address: xingsong@ivpp.ac.cn.
2 Univ. Bordeaux, CNRS, MCC, PACEA, UMR 5199, 33600 Pessac, France. Electronic address: clement.zanolli@gmail.com.
3 Key Laboratory of Vertebrate Evolution and Human Origins of Chinese Academy of Sciences, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing 100044, China.