TaxNo: 2690Trizonoceras typicale+
| Suborder: |
Goniatitina
|
| Superfamily: |
Dimorphoceratoidea
|
| Family: |
Dimorphoceratidae
|
| Subfamily: |
Dimorphoceratinae
|
| Genus: |
Trizonoceras
|
| Species: | typicale+ |
| Qualifier: | ss |
| Author: |
Girty 1909,p.70
|
| Lower Boundary: |
UOK Caney Shale base, 326.4 million years
|
| Upper Boundary: |
UOK Caney Shale top, 321 million years
|