Suborder:
|
Goniatitina
|
Superfamily:
|
Dimorphoceratoidea
|
Family:
|
Girtyoceratidae
|
Subfamily:
|
Girtyoceratinae
|
Genus:
|
Cousteauceras |
Qualifier:
|
ge |
Author:
|
Korn 1988,p.73
|
Lower Boundary:
|
DER Go gamma 1-2,liethens.base,P2c base, 327.8 million years
|
Upper Boundary:
|
DER lowest E1--E1 alpha, 326 million years
|