About the Authors

Xing Xu

xingxu@vip.sina.com

Affiliation Key Laboratory of Evolutionary Systematics of Vertebrates, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing, China

Qingwei Tan

Affiliation Long Hao Institute of Geology and Paleontology, Hohhot, Inner Mongolia, China

Corwin Sullivan

Affiliation Key Laboratory of Evolutionary Systematics of Vertebrates, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing, China

Fenglu Han

Affiliation Key Laboratory of Evolutionary Systematics of Vertebrates, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing, China

Dong Xiao

Affiliation Department of Land and Resources, Linhe, Inner Mongolia, China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Analyzed the data: XX QT CS FH. Contributed reagents/materials/analysis tools: QT. Wrote the paper: XX CS. Preparation and collection management: QT DX.