TaxNo: 1561Gyroceratites circularis
| Suborder: |
Agoniatitina
|
| Superfamily: |
Mimoceratoidea
|
| Family: |
Mimoceratidae
|
| Genus: |
Gyroceratites
|
| Species: | circularis |
| Qualifier: | ss |
| Author: |
Barrande 1865,pl.10
|
| Lower Boundary: |
CZB praecursor Zone base [12,10], 406.4 million years
|
| Upper Boundary: |
CZB barrandei--elegans Zone [13,25], 404.4 million years
|