| Suborder: |
Goniatitina
|
| Superfamily: |
Thalassoceratoidea
|
| Family: |
Thalassoceratidae
|
| Subfamily: |
Thalassoceratinae
|
| Genus: | Allothalassoceras |
| Qualifier: | ge |
| Author: |
Leonova 2002,p.S41
|
| Valid: |
Prothalassoceras Böse [TAX5217] |
| Lower Boundary: |
Sakmarian--Artinskian [SAK--ART], 284.4 million years
|
| Upper Boundary: |
Kungurian/Leonardian--Roadian [KUN--ROA], 270.6 million years
|
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