Opisthias
| Opisthias Temporal range: Possible Berriasian record | |
|---|---|
| Jaw of Opisthias rarus | |
| Scientific classification | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Order: | Rhynchocephalia |
| Clade: | †Opisthodontia |
| Genus: | †Opisthias Gilmore 1909 |
| Type species | |
| Opisthias rarus Gilmore, 1905 | |
Opisthias is a genus of sphenodont reptile. The type species, Opisthias rarus, is known from the Late Jurassic (Kimmeridgian-Tithonian) of western North America.