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TaxNo: 6879Hammatocyclus incertus
Suborder: Goniatitina
Superfamily: Pericycloidea
Family: Pericyclidae
Subfamily: Hammatocyclinae
Genus: Hammatocyclus
Species: incertus
Qualifier: ss
Author: Kuzina & Konovalova 2004,p.18
Lower Boundary: Fascip./Ammon.--Bollandoc./Bollandit. BZ, 345.3 million years
Upper Boundary: Bollandoc./Bollandit.--Beyrichoceras BZ, 334.5 million years