Genus: Ultrasaurus KIM, 1983 (nomen dubium)
Etymology: Latin, ultra, “beyond”, and Greek, sauros, “lizard”: “Ultra lizard”.
= Ultrasaurus KIM, 1979 (nomen dubium)
= Hltrasurus KIM, 1994 (sic)

Species: tabriensis KIM, 1983
Etymology: In reference to Tabri Station, North Gyeongsang-so, South Korea.
= Hltrasurus tabriensis KIM, 1994 (sic)

Holotype: Department of Geology, Pusan National University, DGBU-1973

Locality: Road side cliff near Bongam pass, 1/6 km southwest of the Tabri Station, Geumseonyg-myeon, Euiseong-gun, North Gyeongsang-so, South Korea.

Horizon: Gugyedon Formation, Hayang Group.


Age: Aptian Stage, Middle Gallic Subepoch, Upper Early Cretaceous Epoch, Early Cretaceous.

Material: Fragmentary left humerus (not a fragmentary ulna, neural spine of a caudal and rib fragment.)