Zygosaurus
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| Zygosaurus Temporal range: Middle Permian | |
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| Life restoration of Zygosaurus | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Clade: | Tetrapoda |
| Order: | †Temnospondyli |
| Family: | †Dissorophidae |
| Clade: | †Eucacopinae |
| Genus: | †Zygosaurus Eichwald, 1848 |
| Type species | |
| †Zygosaurus lucius Eichwald, 1848 | |
Zygosaurus is an extinct genus of dissorophid temnospondyl from the Middle-Late Permian of Russia. It was described in 1848 by Eduard Eichwald, making it the first dissorophid to be described and is known from a single species, Zygosaurus lucius.[1] The location of the holotype, and only known specimen, is unknown,[2] and although casts are reposited in several institutions, little is known about this taxon beyond qualitative aspects of the skull (e.g., preorbital length twice as long as postorbital length; skull width greatest at mid-length of orbits).[3] The skull was estimated to be around 20 cm in length, making it one of the largest dissorophids, being only slightly smaller than Kamacops.[2]
