TaxNo: 3699Pseudotirolites varians
| Suborder: |
Paraceltitina
|
| Superfamily: |
Xenodiscoidea
|
| Family: |
Pseudotirolitidae
|
| Genus: |
Pseudotirolites
|
| Species: | varians |
| Qualifier: | ss |
| Author: |
Zhao et al. 1978,p.129
|
| Lower Boundary: |
Pseudosteph./Tap.--Pseudotir./Pleuron., 252.5 million years
|
| Upper Boundary: |
Rotodiscoceras top, 251.5 million years
|