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TaxNo: 6802Shengoceras primitivum
Suborder: Goniatitina
Superfamily: Cycloloboidea
Family: Cyclolobidae
Subfamily: Kufengoceratinae
Genus: Shengoceras
Species: primitivum
Qualifier: ss
Author: Leonova 2002,p.S91
Lower Boundary: Roadian--Wordian (Murgabian) [ROA--WOR], 268 million years
Upper Boundary: Capitanian--Wuchiapingian [CAP--DZH], 260.4 million years