Genus: Orosaurus HUXLEY, 1867
Etymology: Greek, oros, "mountain" and Greek, sauros, "lizard": “Mountain lizard".
= Orinosaurus LYDEKKER, 1889 (nomen dubium)
Etymology: Greek, orinos, “belonging to the mountains” and Greek, sauros, "lizard": “Mountain lizard”.
= Orosaurus NORMAN, 1985 (sic)
Species: capensis HUXLEY, 1867
Etymology: In reference to Cape Province, South Africa.
= Euskelosaurus capensis (LYDEKKER, 1889) HUENE, 1906 (nomen dubium)
= Orinosaurus capensis LYDEKKER, 1889 (nomen dubium)
Holotype: BMNH R1626
Locality: "from the neighborhood of Aliwal North", Eastern Cape Province, South Africa.
Horizon: Lower Elliot Formation.
Age: Late Carnian or Early Norian Stage, Upper Late Triassic Epoch, Late Triassic.
Material: Proximal end of left tibia.
BMNH R1626a: Middle portion of a right femur.