| Chthonosaurus Temporal range: Late Permian ~ | |
|---|---|
 | |
| Life restoration of Chthonosaurus velocidens | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Clade: | Synapsida |
| Clade: | Therapsida |
| Clade: | † Therocephalia |
| Clade: | † Eutherocephalia |
| Genus: | † Chthonosaurus Vjuschkov 1955 |
| Type species | |
| †Chthonosaurus velocidens Vjuschkov 1955 | |
Chthonosaurus is an extinct genus of eutherocephalian [1] therapsids from the Late Permian Kutulukskaya Formation of Russia. The type species Chthonosaurus velocidens was named in 1955. [2]
