TaxNo: 6816Rotodiscoceras nodosum
| Suborder: |
Paraceltitina
|
| Superfamily: |
Xenodiscoidea
|
| Family: |
Pleuronodoceratidae
|
| Genus: |
Rotodiscoceras
|
| Species: | nodosum |
| Qualifier: | sn |
| Author: |
Yang 1987,p.269
|
| Lower Boundary: |
AZB Dzhulfites beds base, 253 million years
|
| Upper Boundary: |
Rotodiscoceras top, 251.5 million years
|