Li, L.-x., Feng, H.-z.; Wang, W.-h.; Chen, W.-j. (2014). A new graptolite genus Norvegiograptus from the Ningkuo Formation (Lower Ordovician) of Hunan Province, China. Acta Palaeontologica Sinica. 53(2): 172-179.
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Li, L.-x., Feng, H.-z.; Wang, W.-h.; Chen, W.-j.
2014
A new graptolite genus Norvegiograptus from the Ningkuo Formation (Lower Ordovician) of Hunan Province, China