Genus: Gigantoraptor XU, TAN, WANG, ZHAO, & TAN, 2007
Etymology: Latin, gigan, "giant," and Latin, raptor, "theif." The generic name refers to the animal being a gigantic raptor dinosaur.

Species: erlianensis XU, TAN, WANG, ZHAO, & TAN, 2007
Etymology: In reference to the Erlian basin, Inner Mongolia, where the holotype was found.

Holotype: LH V0011

Locality: Saihangaobi, Sunitezuoqi, Nei Mongol Autonomous Region (Inner Mongolia), China.

Horizon: Iren Dabasu Formation.

Biostratigraphy:

Age: Cenomanian Stage, Upper Gallic Subepoch, Lowermost Gulf Epoch, Middle Cretaceous.

Material: An incomplete skeleton preserving a nearly complete mandible, several partial presacral vertebrae, most caudal vertebrae, nearly complete right scapula, much of the forelimbs, partial ilium, nearly comlete pubes and hind limbs.