TaxNo: 225Irinoceras romingeri
| Suborder: |
Tornoceratina
|
| Superfamily: |
Prionoceratoidea
|
| Family: |
Prionoceratidae
|
| Subfamily: |
Prionoceratinae
|
| Genus: |
Irinoceras
|
| Species: | romingeri |
| Qualifier: | ss |
| Author: |
Winchell 1862,p.427
|
| Lower Boundary: |
UMI Marshall Sdst.I base, 349 million years
|
| Upper Boundary: |
UMI Marshall Sdst.I top, 339 million years
|