TaxNo: 6268Genus Parahammatocyclus
| Suborder: |
Goniatitina
|
| Superfamily: |
Pericycloidea
|
| Family: |
Pericyclidae
|
| Subfamily: |
Pericyclinae
|
| Genus: | Parahammatocyclus |
| Qualifier: | ge |
| Author: |
Riley 1996,p.78
|
| Lower Boundary: |
Chadian--Arundian [V1a--V1b] [CHD--ARU], 344.5 million years
|
| Upper Boundary: |
Arundian--Holkerian [V2a--V2b][ARU--HLK], 340 million years
|