TaxNo: 4345Tornoceras douglassi
| Suborder: |
Tornoceratina
|
| Superfamily: |
Tornoceratoidea
|
| Family: |
Tornoceratidae
|
| Subfamily: |
Tornoceratinae
|
| Genus: |
Tornoceras
|
| Species: | douglassi |
| Qualifier: | ss |
| Author: |
Raymond 1909,p.155
|
| Lower Boundary: |
UD3B--UD3C:(delphinus Zone base) [14,55], 368 million years
|
| Upper Boundary: |
UD4A--UD4B: dunkeri Zone base [15,55], 366.8 million years
|