1. Institute of Paleontology, Hebei GEO University, Shijiazhung, China
2. Dalian Natural History Museum, Dalian, China
3. Faculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Japan
4. Department of Geoscience, University of Calgary, Calgary, Alberta, Canada
5. Institute of Geology, Chinese Academy of Geological Sciences, Beijing, China