TaxNo: 2878Beyrichoceras constans
| Suborder: |
Goniatitina
|
| Superfamily: |
Pericycloidea
|
| Family: |
Maxigoniatitidae
|
| Genus: |
Beyrichoceras
|
| Species: | constans |
| Qualifier: | ss |
| Author: |
Kuzina 1987,p.57
|
| Lower Boundary: |
Up.Visean Goniatites BZ base [up.VIS], 333.5 million years
|
| Upper Boundary: |
DER Go alpha 2--Go alpha 3 [11.60], 332.3 million years
|