TaxNo: 6598Polaricyclus rileyi
| Suborder: |
Goniatitina
|
| Superfamily: |
Pericycloidea
|
| Family: |
Pericyclidae
|
| Subfamily: |
Pericyclinae
|
| Genus: |
Polaricyclus
|
| Species: | rileyi |
| Qualifier: | ss |
| Author: |
Kuzina 2000,p.21
|
| Lower Boundary: |
mid.Tournais.--up.Tournaisian [Tn2--Tn3], 353 million years
|
| Upper Boundary: |
Tournaisian--Visean [TOU--VIS], 345.3 million years
|