Genus: Yinlong XU, FORSTER, CLARK & MO, 2006
Etymology: Chinese, yin, "hiding" and Chinese, long, "dragon," derived from the movie 'Crouchign Tiger', Hidden Dragon' which was filmed in the locality where the holotype was found.

Species: downsi XU, FORSTER, CLARK & MO, 2006
Etymology: In honor of Will Downs, who joined many palaeontological expeditions in China including the one in 2003, shortly before his death.

Holotype: IVPP V14530

Locality: Wucaiwan area, Junggar Basin, Xinjiang Uygur Zizhiqu (Sinkang) Province, China.

Horizon: Upper part of the Shishugou Formation.


Age: Oxfordian Stage, Lower Malm Epoch, Early Late Jurassic.

Material: Skull and skeleton.

Note: Has gastroliths.


IVPP 18636, V18686, V18637, V18684: Are associated with cranial elements.

IVPP V18679: A partial specimenis disarticulated and consists of postcranial elements including the right humerus, both ulnae and radii, left ilium and complete right ischium.

IVPP V18685: Articulated dorsal vertebrae, sacral vertebrae and 40 articulated caudal vertebrae, the nearly complete left forelimb consists of left scapula, ulna, radius, manus, the paired ilia, the left femur, tibia, fibula and pes.

IVPP V18682: Dorsal vertebrae, sacral vertebrae and caudal vertebrae associated with cheverons, paired ilia, left tibia, fibula and partial pess, ossified tendons are present on the neural spine of the dorsal vertebrae.

IVPP V18677: The caudal part of the postcranial skeleton in dorsal view, including sacrals, caudals, both ilia, the complete left hind limb, right femur, tibia, fibula and metatarsals.