TaxNo: 1639Tornoceras bertrandi
| Suborder: |
Tornoceratina
|
| Superfamily: |
Tornoceratoidea
|
| Family: |
Tornoceratidae
|
| Subfamily: |
Tornoceratinae
|
| Genus: |
Tornoceras
|
| Species: | bertrandi |
| Qualifier: | ss |
| Author: |
Frech 1902,p.172
|
| Lower Boundary: |
MD2A--MD2B: undul.--molarium Z. [13,00], 390.6 million years
|
| Upper Boundary: |
mid.--up.varcus Zone [17,00], 389 million years
|