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TaxNo: 4358Sulcogirtyoceras intracostatum
Suborder: Goniatitina
Superfamily: Dimorphoceratoidea
Family: Girtyoceratidae
Subfamily: Girtyoceratinae
Genus: Sulcogirtyoceras
Species: intracostatum
Qualifier: sy
Author: Knopp 1931,p.11
Valid: Sulcugirtyoceras burhennei (Brüning '23)
Lower Boundary: DER Go spirale--Go beta rotundum, 328.6 million years
Upper Boundary: DER Go beta--gamma, granos.base [P1--P2], 328.2 million years