TaxNo: 3319Perrinites tardus
| Suborder: |
Goniatitina
|
| Superfamily: |
Shumarditoidea
|
| Family: |
Perrinitidae
|
| Genus: |
Perrinites
|
| Species: | tardus |
| Qualifier: | ss |
| Author: |
Miller & Furnish 1940,p.154
|
| Lower Boundary: |
UTX Kungurian/Leonardian base, 275.6 million years
|
| Upper Boundary: |
UTX Bone Spring Fm. top, 268 million years
|