Suborder:
|
Goniatitina
|
Superfamily:
|
Dimorphoceratoidea
|
Family:
|
Eogonioloboceratidae
|
Genus:
|
Arcanoceras
|
Species:
|
sp. |
Qualifier:
|
in |
Author:
|
div. authors
|
Lower Boundary:
|
CNG Qixu 6 base, 326.4 million years
|
Upper Boundary:
|
CNG Qixu 6 top, 321 million years
|