1 Shaanxi Key Laboratory of Early Life and Environments, State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi'an 710069, China; Northwest University Museum, Xi'an 710069, China. Electronic address: liuw.mus@nwu.edu.cn.
2 Shaanxi Key Laboratory of Early Life and Environments, State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi'an 710069, China. Electronic address: xzhang69@nwu.edu.cn.
3 Shaanxi Key Laboratory of Early Life and Environments, State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi'an 710069, China.
4 Northwest University Museum, Xi'an 710069, China.