TaxNo: 6662Clymenia antiquissima
| Suborder: |
Clymeniina
|
| Superfamily: |
Clymenioidea
|
| Family: |
Clymeniidae
|
| Genus: |
Clymenia
|
| Species: | antiquissima |
| Qualifier: | sn |
| Author: | |
| Valid: | Discoceras antiquissimus -- Nautiloidea |
| Lower Boundary: |
Cambrian--Ordovician [Cambr.--O], 488.3 million years
|
| Upper Boundary: |
Ordovician--Silurian (O--S), 443.7 million years
|