| Suborder: |
Goniatitina
|
| Superfamily: |
Schistoceratoidea
|
| Family: |
Schistoceratidae
|
| Genus: |
Schistoceras
|
| Species: | hyatti |
| Qualifier: | sy |
| Author: |
Smith 1903,p.106
|
| Valid: |
Schistoceras missouriense [TAX2913] |
| Lower Boundary: |
UTX Graford Fm.--Brad Fm., 305.3 million years
|
| Upper Boundary: |
UTX Graham Fm. top, 301 million years
|
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