| Suborder: |
Tornoceratina
|
| Superfamily: |
Tornoceratoidea
|
| Family: |
Tornoceratidae
|
| Subfamily: |
Tornoceratinae
|
| Genus: |
Tornoceras
|
| Species: | arcuatum aff. |
| Qualifier: | af |
| Author: |
Göddertz 1987,p.196
|
| Lower Boundary: |
MD2C--MD2D:Afromaenioc.GZ base [16,20], 389.3 million years
|
| Upper Boundary: |
mid.--up.varcus Zone [17,00], 389 million years
|
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