Genus: Pentaedrusaurus LI, 1989
Etymology: Greek, penta, “five”, Greek, hedron, “angle”, Greek, sauros, “lizard”: Five-angled lizard.

Species: ordosianus LI, 1989
Etymology:

Holotype: IVPP P 8735

Locality: Mazhen, Fugu County, Shaanxi Province, China.

Horizon: Heshanggou Formation.

Biostratigraphy:

Age: Early Triassic.

Material: Slightly damaged skull and lower jaw, most dorsal vertebrae, incomplete pectoral and pelvic girdles, fore and hind limbs.