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TaxNo: 5011Beyrichoceras guizhouense
Suborder: Goniatitina
Superfamily: Pericycloidea
Family: Maxigoniatitidae
Genus: Beyrichoceras
Species: guizhouense
Qualifier: ss
Author: Chao 1962,p.103
Lower Boundary: Bollandoc./Bollandit.--Beyrichoceras BZ, 334.5 million years
Upper Boundary: Beyrichoceras BZ top, 332.1 million years