TaxNo: 3616Planodiscoceras involutum
| Suborder: |
Otoceratina
|
| Family: |
Anderssonoceratidae
|
| Subfamily: |
Planodiscoceratinae
|
| Genus: |
Planodiscoceras
|
| Species: | involutum |
| Qualifier: | ss |
| Author: |
Zhao et al. 1978,p.82
|
| Lower Boundary: |
Anderssonoceras/Prototoceras base, 260.4 million years
|
| Upper Boundary: |
Anderssonoc./Prototoc.--Araxoc./Kongl., 258 million years
|