| Paleothyris Temporal range:
| |
|---|---|
| |
| Paleothyris acadiana fossil | |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Genus: | †Paleothyris Carroll, 1969 |
| Species: | †P. acadiana
|
| Binomial name | |
| †Paleothyris acadiana Carroll, 1969
| |
Paleothyris was a small, agile, anapsid romeriidan reptile which lived in the Moscovian (Carboniferous) age of the Late Carboniferous in Nova Scotia.