TaxNo: 3788Genus Berkhoceras
| Suborder: |
Goniatitina
|
| Superfamily: |
Dimorphoceratoidea
|
| Family: |
Berkhoceratidae
|
| Genus: | Berkhoceras |
| Qualifier: | gy |
| Author: |
Librovitch 1938,p.48
|
| Valid: | Kazakhoceras Ruzhencev 1947,p.521 |
| Lower Boundary: |
DER Go beta--gamma, granos.base [P1--P2], 328.2 million years
|
| Upper Boundary: |
RUS Nm1b2--Nm1c1,Fayettevillea-Delepinoc, 324 million years
|