1. College of Resource Environment and Tourism, Hubei University of Arts and Science, Xiangyang 441053, China
2. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation & Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059, China
3. Yunnan Key Laboratory for Palaeobiology, Institute of Palaeontology, Yunnan University, Kunming, Yunnan 650091, China