TaxNo: 5908Genus Syrdenites
| Suborder: |
Prolecanitina
|
| Superfamily: |
Medlicottioidea
|
| Family: |
Medlicottiidae
|
| Subfamily: |
Medlicottiinae
|
| Genus: | Syrdenites |
| Qualifier: | ge |
| Author: |
Nassichuk et al. 1965,p.41
|
| Lower Boundary: |
AZB base Araxoceras beds, 260.4 million years
|
| Upper Boundary: |
AZB Araxoceras--Vedioceras beds, 256 million years
|