| Suborder: |
Goniatitina
|
| Superfamily: |
Neoglyphioceratoidea
|
| Family: |
Cravenoceratidae
|
| Subfamily: |
Cravenoceratinae
|
| Genus: |
Cravenoceras
|
| Species: | malhamense aff. |
| Qualifier: | af |
| Author: |
Johnson et al. 1962,p.354
|
| Lower Boundary: |
Visean--Namurian/Serpukhovian [VIS--NAM], 326.4 million years
|
| Upper Boundary: |
GBY E1c--E2a1 (Crav.malham.--cowling.), 324 million years
|
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