TaxNo: 6769Prototoceras compressum
| Suborder: |
Otoceratina
|
| Family: |
Araxoceratidae
|
| Subfamily: |
Araxoceratinae
|
| Genus: |
Prototoceras
|
| Species: | compressum |
| Qualifier: | ss |
| Author: |
Bando 1979
|
| Lower Boundary: |
AZB Araxoceras--Vedioceras beds, 256 million years
|
| Upper Boundary: |
Wuchiapingian--Changhsingian [DZH--CHX], 253.8 million years
|