Species: mongoliensis NOWINSKI, 1971
Etymology: In reference to Mongolia, where the specimen was found.

Holotype: Z. Pal. No. MgD-I/9

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

Horizon: Nemegt Formation.

Biostratigraphy: Tarbosaurus bataar (MALEYEV), Saurolophus angusitrostris ROZHDESTVENSKY and Dyoplosaurus giganteus MALEYEV Zone.

Age: Lower Maastrichtian Stage, Uppermost Senonian, Uppermost Gulf Epoch, Late Cretaceous.

Material: Nearly complete skull and lower jaw.

Referred material:

MARYANSKA, 2000

Geological Institute of the Mongolian Academy of Sciences in Ulaanbaatar: Undescribed skull.

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Species: pachi DONG, 1977 (nomen dubium)
Etymology:

Holotype: IVPP V 4879

Locality: Lianmuxi, Shanshan, Shengjinkou, Turpan Basin, Xinjiang Uygur Zizhiqu (Sinkang) Province, China.

Horizon: Subash Formation.

Biostratigraphy:

Age: Campanian-Maastrichtian Stage, Senonian Subepoch, Gulf Epoch, Late Cretaceous.

Material: 2 teeth and 2 fragmentary teeth.

Referred material:

DONG, 1979

Locality: Guandong Province, China.

Horizon: Nanxiong Formation.

Biostratigraphy:

Age: Late Cretaceous.

Material: