TaxNo: 3987Geermuceras platum+
| Suborder: |
Otoceratina
|
| Family: |
Araxoceratidae
|
| Subfamily: |
Konglingitinae
|
| Genus: |
Geermuceras
|
| Species: | platum+ |
| Qualifier: | ss |
| Author: |
Liang 1983,p.612
|
| Lower Boundary: |
Anderssonoceras/Prototoceras base, 260.4 million years
|
| Upper Boundary: |
Araxoc./Konglingites--Sanyangites, 256 million years
|