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TaxNo: 1978Cousteauceras? involutum
Suborder: Goniatitina
Superfamily: Dimorphoceratoidea
Family: Girtyoceratidae
Subfamily: Girtyoceratinae
Genus: Cousteauceras?
Species: involutum
Qualifier: ss
Author: Horn 1960,p.330
Lower Boundary: Visean--Namurian/Serpukhovian [VIS--NAM], 326.4 million years
Upper Boundary: DER lowest E1--E1 alpha, 326 million years