TaxNo: 2610Anthracoceras tenuispirale
| Suborder: |
Goniatitina
|
| Superfamily: |
Dimorphoceratoidea
|
| Family: |
Anthracoceratidae
|
| Genus: |
Anthracoceras
|
| Species: | tenuispirale |
| Qualifier: | ss |
| Author: |
Demanet 1941,p.148
|
| Lower Boundary: |
GBY E2b1--E2b2 (Cr.edalensis--holmesi), 322 million years
|
| Upper Boundary: |
GBY E2b2--E2b3 (holmesi--Cr.nititoides), 321.5 million years
|