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TaxNo: 4221Glaphyrites illinoisensis
Suborder: Goniatitina
Superfamily: Gastrioceratoidea
Family: Glaphyritidae
Subfamily: Glaphyritinae
Genus: Glaphyrites
Species: illinoisensis
Qualifier: ss
Author: Miller & Gurley 1896,p.42
Lower Boundary: UAR Winslow Fm.--low. Atoka Fm., 309.5 million years
Upper Boundary: U Atokan--Desmoinesian [ATO--DES], 308.6 million years