TaxNo: 5224Genus Postaktubites
| Suborder: |
Goniatitina
|
| Superfamily: |
Shumarditoidea
|
| Family: |
Shumarditidae
|
| Genus: | Postaktubites |
| Qualifier: | gy |
| Author: |
Ruzhencev 1955,p.1108
|
| Valid: |
Shumardites Smith,1903,p.134 [TAX5226] |
| Lower Boundary: |
UTX Graford Fm.--Brad Fm., 305.3 million years
|
| Upper Boundary: |
UTX Graham Fm. top, 301 million years
|