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.

Biostratigraphy:

Age: Late Carnian or Early Norian Stage, Upper Late Triassic Epoch, Late Triassic.

Material: Proximal end of left tibia.

Referred material:

BMNH R1626a: Middle portion of a right femur.