TaxNo: 5122Genus Dushanoceras
| Suborder: |
Paraceltitina
|
| Superfamily: |
Xenodiscoidea
|
| Family: |
Pseudotirolitidae
|
| Genus: | Dushanoceras |
| Qualifier: | gy |
| Author: |
Zhao et al. 1978,p.134
|
| Valid: |
Rotodiscoceras Zhao & Liang [TAX5131] |
| Lower Boundary: |
Pseudotir./Pleuron.--Rotodiscoceras beds, 252 million years
|
| Upper Boundary: |
Rotodiscoceras top, 251.5 million years
|