| Peirosaurus Temporal range: Late Cretaceous,
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| Peirosaurus (top left) | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Clade: | Archosauria |
| Clade: | Pseudosuchia |
| Clade: | Crocodylomorpha |
| Clade: | Crocodyliformes |
| Clade: | †Notosuchia |
| Clade: | †Sebecosuchia |
| Clade: | †Sebecia |
| Family: | †Peirosauridae |
| Genus: | †Peirosaurus Price, 1955 |
| Type species | |
| †Peirosaurus torminni Price, 1955
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Peirosaurus is an extinct genus of peirosaurid crocodylomorph known from the Late Cretaceous period (late Maastrichtian stage) of Minas Gerais, southern Brazil. It contains a single species, Peirosaurus torminni. It is the type genus of the family Peirosauridae.