TaxNo: 3056Genus Beyrichoceras
| Suborder: |
Goniatitina
|
| Superfamily: |
Pericycloidea
|
| Family: |
Maxigoniatitidae
|
| Genus: | Beyrichoceras |
| Qualifier: | ge |
| Author: |
Foord 1903,p.218
|
| Lower Boundary: |
DER Pe delta, nasutus Z. base [09.25], 334.5 million years
|
| Upper Boundary: |
DER Go beta striatus--Go beta falcatus, 329.4 million years
|