TaxNo: 2968Trizonoceras exile
| Suborder: |
Goniatitina
|
| Superfamily: |
Dimorphoceratoidea
|
| Family: |
Dimorphoceratidae
|
| Subfamily: |
Dimorphoceratinae
|
| Genus: |
Trizonoceras
|
| Species: | exile |
| Qualifier: | ss |
| Author: |
Ruan 1981,p.210
|
| Lower Boundary: |
CNG Qixu 6 base, 326.4 million years
|
| Upper Boundary: |
CNG Qixu 6 top, 321 million years
|