Species: yumenensis HOU & LIU, 1984
Etymology: In reference to the Yumen Municipality, in the Gansu Province, where the specimen was found.

Locality: Northwest of the village of Chenjiawan, Changma Prefecture,Yumen Municipality, Kansu (Gansu) Province, China.

Horizon: Middle Xiagou Formation.

Biostratigraphy:

Age: Aptian-Albian Stage, Middle Gallic Subepoch, Upper Early Cretaceous Epoch, Early Cretaceous.

Referred material:

WANG, O'CONNOR, LI, & YOU, 2015

GSGM-05-CM-014: Complete left and partial right forelimbs, completehind limbs, scattered ribs and gastroliths.

GSGM-06-CM-011: Nearly complete sternum, sternal ribs, partial furcula, sternal ribs and gastroliths.

GSGM-07-CM-011: Articulated skeleton and gastrolithis, lacking the skull, cervical and caudal vertebrae, pectoral girdles and forelimbs.