TaxNo: 5775Subfamily Tornoceratinae
| Suborder: |
Tornoceratina
|
| Superfamily: |
Tornoceratoidea
|
| Family: |
Tornoceratidae
|
| Subfamily: | Tornoceratinae |
| Qualifier: | fs |
| Author: |
Arthaber 1911,p.175
|
| Lower Boundary: |
mid.--up.varcus Zone [17,00], 389 million years
|
| Upper Boundary: |
UD5C--UD6A1: Sphenoclym.brevispina base, 364 million years
|