Species: orientalis JI, NORELL, MAKOVICKY, GAO, JI, & YUAN, 2003 
  Etymology: orientalis refers to the east.
Holotype: NGMC 97-4-002
Locality: Sihetun, Shangyuan, near Beipiao City, Liaoning Province, China.
Horizon: Lower part of the Yixian Formation.
Biostratigraphy:
Age: Early Cretaceous.
Material: Fragmentary skull and fragmentary skeleton lacking cervicals, first
  dorsals, most of the pectral girdle, lower legs and distal caudals.
  Note: Has gastroliths.