TaxNo: 5345Genus Hyattoceras
| Suborder: |
Goniatitina
|
| Superfamily: |
Marathonitoidea
|
| Family: |
Hyattoceratidae
|
| Genus: | Hyattoceras |
| Qualifier: | ge |
| Author: |
Gemmellaro 1887,p.14
|
| Lower Boundary: |
Roadian--Wordian (Murgabian) [ROA--WOR], 268 million years
|
| Upper Boundary: |
RIT Amarassi beds top, 258 million years
|