Holotype: AMNH 6645

Locality: Bayan Zag (= Bayn Dzak, Shabarakh Usu GILMORE, 1943), Ömnögov (South Gobi), Mongolia.

Horizon: Djadochta Formation.

Biostratigraphy:

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

Material: Parietal, fragment of frontal, portion of postorbital, both postfrontals, proximal half of right, part of right jugal, quadrate and squamosal, teeth, dorsal vertebra centrum, 3 dorsal vertebrae, parts of
others, rib and other bone fragments.

Referred material:

AMNH 6643: Articulated hind limbs, Incomplete feet and pelvis, sacrum, a few dorsal and caudal vertebrae and portions of 1 fore limb and foot.

 

BORSUK-BIALYNICKA, 1984

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

Horizon: Barun Goyot Formation.

Biostratigraphy:

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

Material:

ZPAL MgR-I/65: Skull lacking a preorbital part, and 2 damaged anterior cervical vertebrae.

 

JERZYKIEWICZ, CURRIE, EBERTH, JOHNSTON, KOSTER & ZHENG, 1993

Locality: Bayan Mandahu, Urad Houqi, Inner Mongolia, China.

Horizon: Djadochta Formation.

Biostratigraphy:

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

Material:

Number: Not given: