TaxNo: 6256Beyrichoceras obtusum aff.
| Suborder: |
Goniatitina
|
| Superfamily: |
Pericycloidea
|
| Family: |
Maxigoniatitidae
|
| Genus: |
Beyrichoceras
|
| Species: | obtusum aff. |
| Qualifier: | af |
| Author: |
Riley 1996,p.27
|
| Lower Boundary: |
Bollandoc./Bollandit.--Beyrichoceras BZ, 334.5 million years
|
| Upper Boundary: |
Asbian--Brigantian [P1a--P1b] [ASB--BRI], 332 million years
|