| Suborder: |
Goniatitina
|
| Superfamily: |
Thalassoceratoidea
|
| Family: |
Thalassoceratidae
|
| Subfamily: |
Thalassoceratinae
|
| Genus: | Prothalassoceras |
| Qualifier: | ge |
| Author: |
Böse 1919,p.102
|
| Lower Boundary: |
RUS lower--upper Zhigulian, 305.9 million years
|
| Upper Boundary: |
Kochusu Fm.,lower, lower--middel part, 270 million years
|
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