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TaxNo: 2063Sulcogirtyoceras? costulatum
Suborder: Goniatitina
Superfamily: Dimorphoceratoidea
Family: Girtyoceratidae
Subfamily: Girtyoceratinae
Genus: Sulcogirtyoceras?
Species: costulatum
Qualifier: ss
Author: Kobold 1933,p.504
Lower Boundary: DER Go beta falcatus--Go beta gracilis, 329.1 million years
Upper Boundary: DER Go beta gracilis Z.--spirale Z. [13., 328.8 million years