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TaxNo: 6044Genus Megatrochoceras
Suborder: Goniatitina
Superfamily: Gonioloboceratoidea
Family: Gonioloboceratidae
Genus: Megatrochoceras
Qualifier: ge
Author: Yang 1978,p.158
Lower Boundary: Yeadonian--Langsettian, Westph.A [YEA--, 313 million years
Upper Boundary: Duckmantian--Bolsovian, Westphal.B--C, 310.6 million years