TaxNo: 2224Tumulites varians+
| Suborder: |
Goniatitina
|
| Superfamily: |
Dimorphoceratoidea
|
| Family: |
Girtyoceratidae
|
| Subfamily: |
Girtyoceratinae
|
| Genus: |
Tumulites
|
| Species: | varians+ |
| Qualifier: | ss |
| Author: |
McCaleb et al. 1964,p.3
|
| Lower Boundary: |
UAR basal--lower shale of Fayetteville, 327 million years
|
| Upper Boundary: |
UAR upper Fayetteville--lower Pitkin, 324.3 million years
|