Species: chalyshevi NOVIKOV & SHISHKIN, 1992
Holotype: PIN No. 4370/2
Locality: Right bank of Khey-Yaga River, 5 km downstream from mouth of Lestanshor Creek, Nenets National Reservation, Arkhangel's sk region, European Russia.
Horizon: Lowermost part of Nyadeytinskaya Formation.
Age: Anisian Stage, Lower Mid Triassic Epoch, Middle Triassic.
Material: Right branch of lower jaw.