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TaxNo: 422Stenocyclus niger
Suborder: Goniatitina
Superfamily: Pericycloidea
Family: Pericyclidae
Subfamily: Ammonellipsitinae
Genus: Stenocyclus
Species: niger
Qualifier: ss
Author: Delépine 1935,p.69
Lower Boundary: IRL Lower Limestone base, 350 million years
Upper Boundary: IRL Lower Limestone top, 345.3 million years