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TaxNo: 5938Subfamily Acutimitoceratinae
Suborder: Tornoceratina
Superfamily: Prionoceratoidea
Family: Prionoceratidae
Subfamily: Acutimitoceratinae
Qualifier: fy
Author: Korn 1994,p.37
Valid: Gattendorfiidae Bartzsch & Weyer (TAX707)
Lower Boundary: P.delph.--low.Platyclym.annulata IIIb/IV, 367.6 million years
Upper Boundary: U Kinderhookian--Osagean [KIH--OSA], 353 million years