| 基金项目： | This work was supported by the National Natural Science Foundation of China (Grant Nos. 41872014, 41572007 and 41572009), the Strategic Priority Research Program of Chinese Academy of Sciences (Grant No. XDB26000000), the State Key Laboratory of Paleobiology and Stratigraphy, Nanjing Institute of Geology and Paleontology, Chinese Academy of Sciences (Grant No. 193123), the Basic Research Plan of Natural Science of Shaanxi Province (Grant No. 2018JM4002), the Student Innovation Project of Chang''an University (No. 202010710458) and the 12th ‘Challenge Cup’ competition of Chang''an University (No. D-P-B-1). We thank three anonymous reviewers and Dr. Susan Turner (Brisbane) for their comments and suggestions. |
