1. Institute of Vertebrate Paleontology, College of Life Science and Technology, Gansu Agricultural University, Lanzhou City 730070, Gansu Province, PR China;
2. Academy for Allied Health Sciences, 1776 Raritan Road, Scotch Plains, NJ 07076, USA;
3. College of Life Sciences, Capital Normal University, 105 Xisanhuanbeilu, Haidian District, Beijing 100048, PR China;
4. Paleontological Institute, Russian Academy of Sciences, Profsoyuznaya street, 123, Moscow 117997, Russia;
5. Cherepovets State University, Lunacharskogo 5, Cherepovets, Vologda Region, 162600 Russia