TaxNo: 295Helicocyclus tianshanicus
| Suborder: |
Goniatitina
|
| Superfamily: |
Pericycloidea
|
| Family: |
Pericyclidae
|
| Subfamily: |
Ammonellipsitinae
|
| Genus: |
Helicocyclus
|
| Species: | tianshanicus |
| Qualifier: | ss |
| Author: |
Librovitch 1927,p.29
|
| Lower Boundary: |
KIT Dzhapryk Fm. base F1, 348 million years
|
| Upper Boundary: |
KIT Dzhapryk Fm. A2--A3, 346 million years
|