in Hubei Sheng Dizhi Kexue Yanjiusuo et al. [Hubei Province Institute of Geology et al. ], Zhongnan diqu gushengwu tuce. 1. Zao gushengdai bufen. [Palaeontology of central and southern China. Vol. 1. Lower Palaeozoic. ] Dizhi Ch uban She [Geological Press
