| Suborder: |
Agoniatitina
|
| Superfamily: |
Mimoceratoidea
|
| Family: |
Teicherticeratidae
|
| Subfamily: |
Palaeogoniatitinae
|
| Genus: |
Irdanites
|
| Species: | leptum |
| Qualifier: | ss |
| Author: |
Ruan 1981,p.28
|
| Lower Boundary: |
CNG Tangdin Fm. base, 406.4 million years
|
| Upper Boundary: |
CNG Tangdin Fm.--Lower Tangxiang Fm., 405.8 million years
|
Loading