TaxNo: 678Balvia tetragona
| Suborder: |
Tornoceratina
|
| Superfamily: |
Prionoceratoidea
|
| Family: |
Prionoceratidae
|
| Subfamily: |
Prionoceratinae
|
| Genus: |
Balvia
|
| Species: | tetragona |
| Qualifier: | sy |
| Author: |
Lange 1929,p.61
|
| Valid: | Balvia nucleus Schmidt 1924 |
| Lower Boundary: |
UD6B--UD6C1 Kamptoclym. endogona base, 362.4 million years
|
| Upper Boundary: |
UD6C2--UD6D1:parad.--Wo.sphaeroi.[18,90], 361.6 million years
|