TaxNo: 3012Genus Irinoceras
| Suborder: |
Tornoceratina
|
| Superfamily: |
Prionoceratoidea
|
| Family: |
Prionoceratidae
|
| Subfamily: |
Prionoceratinae
|
| Genus: | Irinoceras |
| Qualifier: | ge |
| Author: |
Ruzhencev 1947,p.283
|
| Lower Boundary: |
mid.Tournais.--up.Tournaisian [Tn2--Tn3], 353 million years
|
| Upper Boundary: |
RUS Nm1c1--Nm1c2(uralicus--Del.bressoni), 322 million years
|