Theretairus
| Theretairus Temporal range:
| |
|---|---|
| Illustration of the Theretairus antiquus holotype mandible. | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Order: | Rhynchocephalia |
| Suborder: | Sphenodontia |
| Genus: | †Theretairus |
| Type species | |
| †Theretairus antiquus Simpson, 1926
| |
Theretairus is a Late Jurassic genus of sphenodont reptile from the Morrison Formation of western North America, present in stratigraphic zones 5 and 6.