TaxNo: 3659Xenodiscus chaotianensis
| Suborder: |
Paraceltitina
|
| Superfamily: |
Xenodiscoidea
|
| Family: |
Xenodiscidae
|
| Genus: |
Xenodiscus
|
| Species: | chaotianensis |
| Qualifier: | ss |
| Author: |
Zhao et al. 1978,p.106
|
| Lower Boundary: |
Pseudosteph./Tap.--Pseudotir./Pleuron., 252.5 million years
|
| Upper Boundary: |
Pseudotir./Pleuron.--Rotodiscoceras beds, 252 million years
|