TaxNo: 4208Gastrioceras liratum
| Suborder: |
Goniatitina
|
| Superfamily: |
Gastrioceratoidea
|
| Family: |
Gastrioceratidae
|
| Genus: |
Gastrioceras
|
| Species: | liratum |
| Qualifier: | ss |
| Author: |
Nassichuk 1975,p.130
|
| Lower Boundary: |
U Halian--Bloydian, Brentwood base, 313 million years
|
| Upper Boundary: |
Langsettian--Duckmantian, Westphal.A--B, 311.3 million years
|