Species: sinensis ROUGIER, JI & NOVACEK, 2003 JI, 2002
Etymology: Sinensis latinzed adaptation for sino, nearly from China.
= Symetrodontia nova JI, 2002
Holotype: NGMC 97-4-15.
Locality: Sihetun Village, near the town of Shangyuan (Shangyuanzhen), Beipiao City (Beipiaoshi), Liaoning Province, China.
Horizon: Lower Yixian Formation.
Biostratigraphy:
Age: Early Cretaceous.
Material: Skull, skeleton, soft tissue and hair.