Hongtan Town in Yixian County, Anhui Province (117.867, 30.097, Xinling Formation)
Li, J.J.,1984.Graptolites from the Xinling Formation (Upper Ordovician) of South Anhui. Memoirs of Nanjing Institute of Geology and Palaeontology, Academia Sinica 20, 145–194 (inChinese, with English abstract).