TaxNo: 6035Genus Machangoceras
| Suborder: |
Goniatitina
|
| Superfamily: |
Gastrioceratoidea
|
| Family: |
Homoceratidae
|
| Subfamily: |
Homoceratinae
|
| Genus: | Machangoceras |
| Qualifier: | gy |
| Author: |
Yang 1978,p.168
|
| Valid: | Umbetoceras Ruzhentsev & Bogoslovskaia? |
| Lower Boundary: |
RUS Nm2a2--Nm2b1,Reticuloc.-Bashkortoc.G, 317.2 million years
|
| Upper Boundary: |
RUS Nm2c2 top;Biling./Canc.--Bran./Gast., 313 million years
|