Species: vjatkensis CHUDINOV & VJUSHKOV, 1956
Etymology: In reference to the Vyatka River Basin, Kirov Province, European Russia, where the specimen was discovered.

Holotype: PIN 953/1

Locality: Okunevo site, Fedorovka River, Vyatka River Basin, Kirov Province, European Russia.

Horizon: Yarenskian Gorizont, Fedorovka horizon.

Biostratigraphy:

Age: Olenek stage, Early Triassic.

Material: Skull.

Referred material:

IVAKHNENKO 1973

945/1: Skull and dentary.

3 other skulls, many separate skull bones, upper and lower jaws.

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Species: jugensis CHUDINOV & VJUSHKOV, 1956
Etymology:

Holotype: 2252/368

Locality: Vakhnevo, Sharzhenga River, Vologda Province, European Russia.

Horizon:

Biostratigraphy:

Age: Rybinskian Gorizont, Early Triassic.

Material: Parts of skull and lower jaw.