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TaxNo: 4605Genus Sphenoceras
Suborder: Goniatitina
Superfamily: Goniatitoidea
Family: Goniatitidae
Genus: Sphenoceras
Qualifier: gy
Author: Foord 1903,p.218
Valid: Goniatites de Haan 1825,p.39 TAX4603
Lower Boundary: Up.Visean Goniatites BZ base [up.VIS], 333.5 million years
Upper Boundary: DER Go beta striatus--Go beta falcatus, 329.4 million years