TaxNo: 4004Subfamily Girtyoceratinae
| Suborder: |
Goniatitina
|
| Superfamily: |
Dimorphoceratoidea
|
| Family: |
Girtyoceratidae
|
| Subfamily: | Girtyoceratinae |
| Qualifier: | fy |
| Author: |
Wedekind 1918,p.139
|
| Valid: | Girtyoceratidae Wedekind,1918 |
| Lower Boundary: |
Up.Visean Goniatites BZ base [up.VIS], 333.5 million years
|
| Upper Boundary: |
Pendleian--Arnsbergian [PND--ARN], 324 million years
|