Genus: Hadrocodium ZHE-XI, CROMPTON, & SUN, 2001
Etymology: Greek, hadro, "fullness" and Greek, codium, "head": for its very large brain capacity relative to the skull.

Species: wui ZHE-XI, CROMPTON, & SUN, 2001
Etymology: In honor of Dr. X.-C. Wu who, in 1985, discovered the holotype.

Holotype: IVPP 8275

Locality: Dadi Locality, lufeng Basin, Yunnnan Province, China.

Horizon: Upper Red Beds, Lower Lufeng Formation.

Biostratigraphy:

Age: Early Jurassic.

Material: Nearly complete skull and dentary.