Species: primitivus HE, 1984
Etymology: Latin, primitivus, "primitive, original."
Holotype: CCG 20010
Locality: Dashanpu Quarry, Zigong, Sichuan (Szechwan) Province, China.
Horizon: Lower Shaximiao Formation.
Biostratigraphy:
Age: Bathonian-Callovian Stage (DONG & TANG, 1984), Middle-Upper Dogger
Epoch, Middle Jurassic.
Note: Bajocian (CHEN et al. 1982), Lower Middle Dogger Epoch, Middle Jurassic.
Material: Vertebrae, ?scapula, pelvis, femur, tibia, fibula and partial pes.