Genus: Gannansaurus LÜ, YI, ZHONG, & WEI, 2013
Etymology: In reference to Gannan, the district area belonging to Ganzhou of Jiangxi Province, China, where the specimen was found, and Greek, sauros, "lizard."

Species; sinensis LÜ, YI, ZHONG, & WEI, 2013
Etymology: Greek, Sin-, "China" in reference to the country where the specimen was found.

Holotype: GMNH F100001-1, 2

Locality: Longling Town, Ganzhou City, Jiangxi Province, China.

Horizon: Nanxiong Formation.


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

Material: 1 complete posterior dorsal vertebra (GMNH F100001-1), and one mid-caudal vertebra (GMNH F100001-2).