TaxNo: 5401Genus Schistoceras
| Suborder: |
Goniatitina
|
| Superfamily: |
Schistoceratoidea
|
| Family: |
Schistoceratidae
|
| Genus: | Schistoceras |
| Qualifier: | ge |
| Author: |
Hyatt 1884,p.336
|
| Lower Boundary: |
UTX Graford Shale base, 305.6 million years
|
| Upper Boundary: |
Gzhelian--Asselian [C--P], 299 million years
|