| Suborder: |
Paraceltitina
|
| Superfamily: |
Xenodiscoidea
|
| Family: |
Xenodiscidae
|
| Genus: | Xenaspis |
| Qualifier: | gy |
| Author: |
Waagen 1895,p.161
|
| Valid: |
Xenodiscus Waagen,1879,p.32 [TAX5095] |
| Lower Boundary: |
Wordian--Capitanian (Midian) [WOR--CAP], 265.8 million years
|
| Upper Boundary: |
Capitanian--Wuchiapingian [CAP--DZH], 260.4 million years
|
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