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TaxNo: 5722Genus Clistoceras
Suborder: Goniatitina
Superfamily: Gastrioceratoidea
Family: Glaphyritidae
Subfamily: Stenoglaphyritinae
Genus: Clistoceras
Qualifier: ge
Author: Nassichuk 1967,p.240
Lower Boundary: Langsettian--Duckmantian, Westphal.A--B, 311.3 million years
Upper Boundary: U Atokan--Desmoinesian [ATO--DES], 308.6 million years