Genus: Sinognathus YOUNG, 1959
Etymology: Greek, sinai, (Latin, Sinae), “Chinese” and Greek, gnathos, “jaw” + us (m): Chinese jaw.

Species: gracilis YOUNG, 1959
Etymology: Latin, gracilis, "slender."

Holotype: IVPP V 2339

Locality: Shibi, Wuxiang, Shansi (Shanxi) Province, China.

Horizon: Upper Ermaying Formation.

Biostratigraphy:

Age: Middle Triassic.

Material: Skull. A skull with lower jaw.