1. Beijing Institute of Geological Hazard Prevention, Beijing, China
2. College of Palaeontology, Shenyang Normal University, Shenyang, China
3. State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, CAS, Nanjing, China
4. Key Laboratory of Evolution of past Life in Northeast Asia, Ministry of Natural Resources, Shenyang, China