Species: mongoliensis NORELL, McKENNA & NOVACEK, 1992
Etymology: In reference to Mongolia, where the specimen was found.

Holotype: IGM 3/14

Locality: Lizard Hill, Khulsan, 43°29’19"N, 101°08’44"E, Nemegt basin, Ömnögov (South Gobi), Mongolia.

Horizon: Barun Goyot Formation.

Biostratigraphy:

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

Material: Skull and mandibles.

Referred material:

DASHZEVEG, NOVACEK, NORELL, CLARK, CHIAPPE, DAVIDSON, McKENNA, DINGUS, WISHER & ALTANGEREL, 1995, GAO & NORELL, 2000

Locality: Ukhaa Tolgod, northeastern Nemegt Basin, near the salt extraction settlement of Daus, Ömnögov (South Gobi), Mongolia.

Horizon: Djadochta Formation or the Barun Goyot Formation.

Biostratigraphy:

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

Material:

IGM 3/169 (MAE 17/93-184): Incomplete mandibles with teeth.

YI & NORELL, 2010, 2013

IGM 3/196: Skull and mandible.

IGM 3/760: Partial axial skeleton, including doral vertebrae with articulating ribs and an incomplete left forelimb.

 

NORELL & GAO, 1997

Locality: Hermiin Tsav (Khermeen Tsav), western Ömnögov (South Gobi), Mongolia.

Horizon: Barun Goyot Formation, = Red Beds of Khermeen Tsav.

Biostratigraphy:

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

Material:

IGM 3/15: Partial skeleton with well-preserved braincase.