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TaxNo: 2789Diaboloceras varicostatum+*
Suborder: Goniatitina
Superfamily: Schistoceratoidea
Family: Schistoceratidae
Genus: Diaboloceras
Species: varicostatum+*
Qualifier: ss
Author: Miller & Furnish 1940,p.527
Lower Boundary: U Morrowan (Bloydian)--Atokan[MOR--ATO], 310.4 million years
Upper Boundary: UAR Lower--Upper Atoka Fm., 309.2 million years