Genus: Eorasaurus SENNIKOV, 1997
Etymology: Greek, eos, “Dawn”, Ra (Ancient name of the Volga River), and Greek, sauros, “lizard”: Dawn Ra Lizard.

Species: olsoni SENNIKOV, 1997
Etymology: In honor of E. Olson.

Holotype: PIN, no. 156/109

Locality: Semin Ovrag Locality, Semin (Syomin) Ovrag Ravine, Cemin Ravin, village of Il’inskoe, right bank of the Volga River, Tetyushi District, Tatarstan, European Russia.

Horizon: Serverodvinian (North Dvina) horizon, Semen Formation.

Biostratigraphy: Sokolki Faunal Assemblage, Ilinskoe Faunal Subassemblage.

Age: Upper Tatarian Age, Lopingian Subepoch, upper Zechstein Epoch, Late Permian.

Material: 2 posterior cervical vertebrae.

Referred material:

PIN 156/108: 3 cervical vertebrae.

PIN 156/110 : 4 anterior dorsal vertebrae and fragments of ribs.

PIN 156/111: Dorsal vertebra, fragments of vertebrae and ribs.

PIN 156/1s1a, 111b: 2 rib fragments.