Species: borissiaki EFREMOV, 1954
Etymology:
Holotype: PIN 164/7
Locality: Belebei locality, Belebeiskii District, Bashkortostan (Bashkiry) Province, Western Cisuraly, European Russia.
Horizon: Biarmian Series, Belebey Formation, Zone II.
Biostratigraphy: Ocher Faunal Assemblage, Ocher Faunal Subassemblage, Zone II.
Age: Upper Kazanian substage, Capitanian Stage, Middle Zechstein Epoch, Late Middle Permian.
Material: Fragmentary dentary.
Referred material:
PIN 297/1, 297/2: Fragmentary lower jaws.
PIN 164/12: Scapula.
PIN 164/3: Ulna.
PIN 164/6: Angular.