Shengping Village in Xing'an County, Guilin City, Guangxi Province (110.681, 25.616, Huangai Formation)
Chen, X. 1982. Early Ordovician Exigraptus and Glyptograptus from Xingan, N. Guangxi and the origin of biserial axonophorous graptolites[J]. Acta Palaeontologica Sinica, 21: 505-515.