Subashigou in Keping County, Xinjiang Uygur Autonomous Region (78.756, 40.518, Middle Ordovician)
Mu, E.Z., Li, J.J, Ge, M.Y. 1960. Ordovician graptolites from Xinjiang (Sinkiang). Acta Palaeontologica Sinica, 8(1): 27-39.