TaxNo: 4194Aclistoceras constrictum
| Suborder: |
Goniatitina
|
| Superfamily: |
Gastrioceratoidea
|
| Family: |
Glaphyritidae
|
| Subfamily: |
Stenoglaphyritinae
|
| Genus: |
Aclistoceras
|
| Species: | constrictum |
| Qualifier: | ss |
| Author: |
Nassichuk 1975,p.90
|
| Lower Boundary: |
Langsettian--Duckmantian, Westphal.A--B, 311.3 million years
|
| Upper Boundary: |
U Atokan--Desmoinesian [ATO--DES], 308.6 million years
|