TaxNo: 3956Prostacheoceras alter
| Suborder: |
Goniatitina
|
| Superfamily: |
Cycloloboidea
|
| Family: |
Vidrioceratidae
|
| Genus: |
Prostacheoceras
|
| Species: | alter |
| Qualifier: | ss |
| Author: |
Leonova 1989,p.171
|
| Lower Boundary: |
TAP Kochusu Fm. base, 270.6 million years
|
| Upper Boundary: |
TAP Kochusu Fm.,lower--upper subformat., 269.3 million years
|