TaxNo: 5142Genus Urartoceras
| Suborder: |
Otoceratina
|
| Family: |
Araxoceratidae
|
| Subfamily: |
Araxoceratinae
|
| Genus: | Urartoceras |
| Qualifier: | gy |
| Author: |
Ruzhencev 1959,p.64
|
| Valid: |
Prototoceras Spath [TAX5138] |
| Lower Boundary: |
AZB Araxoceras--Vedioceras beds, 256 million years
|
| Upper Boundary: |
AZB Vedioceras--Phisonites beds, 253.8 million years
|