TaxNo: 4006Genus Dryochoceras
| Suborder: |
Goniatitina
|
| Superfamily: |
Dimorphoceratoidea
|
| Family: |
Girtyoceratidae
|
| Subfamily: |
Girtyoceratinae
|
| Genus: | Dryochoceras |
| Qualifier: | gy |
| Author: |
Morgan 1924,p.185
|
| Valid: | Girtyoceras Wedekind 1918,p.140 |
| Lower Boundary: |
Up.Visean Goniatites BZ base [up.VIS], 333.5 million years
|
| Upper Boundary: |
Pendleian--Arnsbergian [PND--ARN], 324 million years
|