TaxNo: 4600Genus Atratoceras
| Suborder: |
Goniatitina
|
| Superfamily: |
Gonioloboceratoidea
|
| Family: |
Gonioloboceratidae
|
| Genus: | Atratoceras |
| Qualifier: | gy |
| Author: |
Librovitch 1957,p.249
|
| Valid: | Eogonioloboceras Librovich 1957,p.249 |
| Lower Boundary: |
Up.Visean Goniatites BZ base [up.VIS], 333.5 million years
|
| Upper Boundary: |
CNG Qixu 15--16, 313 million years
|