TaxNo: 1531Polonoceras clarkei
| Suborder: |
Tornoceratina
|
| Superfamily: |
Tornoceratoidea
|
| Family: |
Tornoceratidae
|
| Subfamily: |
Aulatornoceratinae
|
| Genus: |
Polonoceras
|
| Species: | clarkei |
| Qualifier: | ss |
| Author: |
Miller 1938,p.80
|
| Lower Boundary: |
UNY Upper Hanover Shale top (24--25), 374.5 million years
|
| Upper Boundary: |
UNY Lower--Upper Canadaway (25--26), 370.8 million years
|