1. College of Earth Science and Engineering Shandong University of Science and Technology Qingdao Shandong China
2. Key Laboratory of Stratigraphy and Palaeontology Ministry of Natural Resources Beijing China
3. State Key Laboratory of Palaebiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences Nanjing Jiangsu China
4. Shandong Geological Prospecting Institute, China Chemical Geology and Mine Bureau Jinan Shandong China