in Hubei Sheng Dizhi Kexue Yanjiusuo [Hubei Province Institute of Geology], Zhongnan diqu gushengwu tuce. 1. Zao gushengdai bufen. [Palaeontology of central and southern China. Vol. 1. Lower Palaeozoic. ] Dizhi Chuban She [Ge ical Press], Beijing:159.
