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TaxNo: 5220Genus Aristoceras
Suborder: Goniatitina
Superfamily: Thalassoceratoidea
Family: Thalassoceratidae
Subfamily: Thalassoceratinae
Genus: Aristoceras
Qualifier: ge
Author: Ruzhentsev 1950,p.524
Lower Boundary: RUS lower--upper Zhigulian, 305.9 million years
Upper Boundary: Asselian--Sakmarian [ASS--SAK], 294.6 million years