1. State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210008, China.
2. CAS Center for Excellence in Life and Paleoenvironment, Nanjing 210008, China.
3. University of Science and Technology of China, Hefei 230026, China.
4. Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China.
5. College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing 100049, China.
6. School of Earth Sciences, University of Bristol, Life Sciences Building, Tyndall Avenue, Bristol BS8 1TQ, UK.