TaxNo: 4817Family Cravenoceratidae
| Suborder: |
Goniatitina
|
| Superfamily: |
Neoglyphioceratoidea
|
| Family: | Cravenoceratidae |
| Qualifier: | fa |
| Author: |
Ruzhencev 1957,p.58
|
| Lower Boundary: |
DER Go beta--gamma, granos.base [P1--P2], 328.2 million years
|
| Upper Boundary: |
Arnsbergian--Chokierian [ARN--CHO], 319 million years
|