Ptyonius
Ptyonius is an extinct genus of nectridean lepospondyl within the family Urocordylidae.
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| Ptyonius | |
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Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Subclass: | †Lepospondyli |
| Order: | †Nectridea |
| Family: | †Urocordylidae |
| Subfamily: | †Urocordylinae |
| Genus: | †Ptyonius Cope, 1875 |
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