Suborder:
|
Goniatitina
|
Superfamily:
|
Dimorphoceratoidea
|
Family:
|
Dimorphoceratidae
|
Subfamily:
|
Dimorphoceratinae
|
Genus:
|
Dimorphoceras
|
Species:
|
gilbertsoni+* |
Qualifier:
|
ss |
Author:
|
Phillips 1836,p.236
|
Lower Boundary:
|
DER Go alpha 2--Go alpha 3 [11.60], 332.3 million years
|
Upper Boundary:
|
DER Go alpha 3--Go alpha 4 [13.00], 332 million years
|