1. Beijing Museum of Natural History, 126 Tianqiao South Street, Beijing 100050, People’s Republic of China.
2. School of Earth and Space Sciences, Peking University, Beijing 100871, People’s Republic of China.
3. Department of Geology and Geophysics, Yale University, New Haven, CT 06511, USA.
4. Peabody Museum of Natural History, Yale University, New Haven, CT 06511, USA.
5. Department of Biology and Integrated Bioscience Program, University of Akron, Akron OH 44325-3908, USA.
6. Department of Geological Sciences, University of Texas at Austin, 1 University Station C1100, Austin, TX 78712, USA.
7. Department of Ecology and Evolutionary Biology, Yale University, New Haven, CT 06511, USA.