TaxNo: 4799Aristoceras keytei
| Suborder: |
Goniatitina
|
| Superfamily: |
Thalassoceratoidea
|
| Family: |
Thalassoceratidae
|
| Subfamily: |
Thalassoceratinae
|
| Genus: |
Aristoceras
|
| Species: | keytei |
| Qualifier: | ss |
| Author: |
Smith 1929,p.76
|
| Lower Boundary: |
UTX upper-uppermost Gaptank, 300 million years
|
| Upper Boundary: |
UTX Gaptank Fm. top, 299 million years
|