| Promastodonsaurus Temporal range: Carnian ~ | |
|---|---|
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Clade: | Tetrapoda |
| Order: | †Temnospondyli |
| Suborder: | †Stereospondyli |
| Clade: | †Capitosauria |
| Family: | †Mastodonsauridae |
| Genus: | †Promastodonsaurus Bonaparte 1963 |
| Type species | |
| †Promastodonsaurus bellmani Bonaparte 1963 | |
Promastodonsaurus ("before Mastodonsaurus") is an extinct genus of capitosauroid temnospondyls within the family Mastodonsauridae. Fossils of the genus were found in the Ischigualasto Formation of the Ischigualasto-Villa Unión Basin in northwestern Argentina.
