| Suborder: |
Otoceratina
|
| Family: |
Anderssonoceratidae
|
| Subfamily: |
Planodiscoceratinae
|
| Genus: |
Planodiscoceras
|
| Species: | gratiosum+ |
| Qualifier: | ss |
| Author: |
Zhao & Liang 1966,p.177
|
| Lower Boundary: |
Anderssonoceras/Prototoceras base, 260.4 million years
|
| Upper Boundary: |
Anderssonoc./Prototoc.--Araxoc./Kongl., 258 million years
|
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