Genus: Hazhenia SUN & HOU, 1981
Etymology: For the locality of Hazhen, Fugu County, extreme northern Shaanxi Province, China, where the fossil was found.

Species: concava SUN & HUO, 1981
Etymology:

Holotype: IVPP V 586

Locality: Hazhen, Fugu, Shaanxi (Shensi) Province, China.

Horizon: Heshanggou Formation.

Biostratigraphy:

Age: Early Triassic.

Material: A complete skull with lower jaws, and several postcranial bones.