| Suborder: |
Tornoceratina
|
| Superfamily: |
Prionoceratoidea
|
| Family: |
Prionoceratidae
|
| Subfamily: |
Prionoceratinae
|
| Genus: | Imitoceras |
| Qualifier: | ge |
| Author: |
Schindewolf 1923,p.325
|
| Lower Boundary: |
low.Tournais.--mid.Tournais. [Tn1--Tn2], 357.5 million years
|
| Upper Boundary: |
BEL Calonne top--Fac. Wauls. base, 349 million years
|
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