1 Key Laboratory for Evolution of Past Life and Environment in Northeast Asia, Ministry of Education, Jilin University, Changchun 130026, China; College of Earth Sciences, Jilin University, Changchun 130026, China.
2 Key Laboratory for Evolution of Past Life and Environment in Northeast Asia, Ministry of Education, Jilin University, Changchun 130026, China; Research Center of Palaeontology and Stratigraphy, Jilin University, Changchun 130026, China. Electronic address: gaoyoufeng@jlu.edu.cn.
3 School of Petroleum Engineering, Chongqing University of Science and Technology, Chongqing 401331, China.
4 College of Earth Sciences, Jilin University, Changchun 130026, China.