TaxNo: 2880Girtyoceras boreale
| Suborder: |
Goniatitina
|
| Superfamily: |
Dimorphoceratoidea
|
| Family: |
Girtyoceratidae
|
| Subfamily: |
Girtyoceratinae
|
| Genus: |
Girtyoceras
|
| Species: | boreale |
| Qualifier: | ss |
| Author: |
Kuzina 1987,p.58
|
| Lower Boundary: |
Up.Visean Goniatites BZ base [up.VIS], 333.5 million years
|
| Upper Boundary: |
DER Go gamma 1-2,liethens.base,P2c base, 327.8 million years
|