TaxNo: 4216Christioceras trifurcatum+
| Suborder: |
Goniatitina
|
| Superfamily: |
Schistoceratoidea
|
| Family: |
Christioceratidae
|
| Genus: |
Christioceras
|
| Species: | trifurcatum+ |
| Qualifier: | ss |
| Author: |
Nassichuk & Furnish 1965,p.724
|
| Lower Boundary: |
Langsettian--Duckmantian, Westphal.A--B, 311.3 million years
|
| Upper Boundary: |
U Atokan--Desmoinesian [ATO--DES], 308.6 million years
|