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.