TaxNo: 6386Genus Chengxianites
| Suborder: |
Goniatitina
|
| Superfamily: |
Cycloloboidea
|
| Family: |
Vidrioceratidae
|
| Genus: | Chengxianites |
| Qualifier: | gy |
| Author: |
Xu 1977,p.572
|
| Valid: |
Martoceras Tumanskaia,1938 TAX5363 |
| Lower Boundary: |
RIT Somohole beds base, 299 million years
|
| Upper Boundary: |
TAP upper Bus--Ter beds top, 268 million years
|