TaxNo: 2826Aristoceras chkalovi+
| Suborder: |
Goniatitina
|
| Superfamily: |
Thalassoceratoidea
|
| Family: |
Thalassoceratidae
|
| Subfamily: |
Thalassoceratinae
|
| Genus: |
Aristoceras
|
| Species: | chkalovi+ |
| Qualifier: | ss |
| Author: |
Ruzhencev 1940,p.526
|
| Lower Boundary: |
RUS lower--upper Zhigulian, 305.9 million years
|
| Upper Boundary: |
Gzhelian--Asselian [C--P], 299 million years
|