Huangnigang Village in Jiangshan City, Zhejiang Province (118.629, 28.77, Ningkuo Formation)
Mu, E.Z., Li, J.J. 1958. Scandent graptolites from the Ningkuo Shale of the Kiangshan–Changshan area, western Chekiang. Acta Palaeontologica Sinica 6(4), 391–427.