TaxNo: 5011Beyrichoceras guizhouense
| Suborder: |
Goniatitina
|
| Superfamily: |
Pericycloidea
|
| Family: |
Maxigoniatitidae
|
| Genus: |
Beyrichoceras
|
| Species: | guizhouense |
| Qualifier: | ss |
| Author: |
Chao 1962,p.103
|
| Lower Boundary: |
Bollandoc./Bollandit.--Beyrichoceras BZ, 334.5 million years
|
| Upper Boundary: |
Beyrichoceras BZ top, 332.1 million years
|