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TaxNo: 5880Family Hyattoceratidae
Suborder: Goniatitina
Superfamily: Marathonitoidea
Family: Hyattoceratidae
Qualifier: fa
Author: Miller & Furnish 1957,p.L53
Lower Boundary: Kungurian/Leonardian--Roadian [KUN--ROA], 270.6 million years
Upper Boundary: RIT Amarassi beds top, 258 million years