1 Key Laboratory of Vertebrate Evolution and Human Origins of Chinese Academy of Sciences, Institute of VertebratePaleontology and Paleoanthropology, Chinese Academy of Sciences, 100044, Beijing, China. wufeixiang@ivpp.ac.cn.
2 Muséum national d'Histoire naturelle, UMR 7207, CP38, 8, rue Buffon 75231, Paris, Cedex 05, France.
3 Key Laboratory of Vertebrate Evolution and Human Origins of Chinese Academy of Sciences, Institute of VertebratePaleontology and Paleoanthropology, Chinese Academy of Sciences, 100044, Beijing, China. zhangchi@ivpp.ac.cn.