1. Chengdu Center of China Geological Survey Chengdu 610081 China
2. Cavanilles Institute of Biodiversity & Evolutionary Biology University of Valencia 46980 Valencia Spain
3. Institute of Geological Survey China University of Geosciences (Wuhan) Wuhan 430074 China
4. State Key Laboratory of Palaeobiology & Stratigraphy (Nanjing Institute of Geology & Palaeontology, CAS) Nanjing 210008 China
5. School of Earth Sciences University of Bristol Life Sciences Building, Tyndall Avenue Bristol BS8 1TQ UK
6. State Key Laboratory of Biogeology & Environmental Geology China University of Geosciences Wuhan 430074 China
7. State Key Laboratory of Palaeobiology & Stratigraphy Nanjing Institute of Geology & Palaeontology & Center for Excellence in Life & Palaeoenvironment Chinese Academy of Sciences 39 East Beijing Road Nanjing 210008 China