Genus: Polrussia BORSUK-BIALYNICKA & ALIFANOV, 1991
Etymology:

Species: mongoliensis BORSUK-BIALYNICKA & ALIFANOV, 1991
Etymology: In reference to Mongolia, country of origin.

Holotype: ZPAL MgR-I/119

Locality: Khulsan, Nemegt Basin, Gobi Desert, Ömnögov (South Gobi), Mongolia.

Horizon: Barun Goyot Formation.

Biostratigraphy:

Age: Middle –Late Campanian Stage, Senonian Subepoch, Gulf Epoch, Late Cretaceous..

Material: A damaged skull with associated mandibles.