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TaxNo: 6447Genus Ningxiaceras
Suborder: Goniatitina
Superfamily: Gonioloboceratoidea
Family: Wiedeyoceratidae
Genus: Ningxiaceras
Qualifier: ge
Author: Yang 1987,p.158
Lower Boundary: Serpukhovian--Bashkirian [SPK--BSH], 318.1 million years
Upper Boundary: Langsettian--Duckmantian, Westphal.A--B, 311.3 million years