Genus: Brachyrophus COPE, 1878 (nomen dubium)
Etymology: Greek, brachys, “short”, Greek, orophe, “roof, ridgepole (dorsal vertebrae)"+ us: Short roofed one.
= Brachyhophus KUHN, 1965 (sic)

Species: altarkansanus COPE, 1878 (nomen dubium)
Etymology: In reference to the Upper Arkansas River, Colorado.

Holotype: AMNH 5776

Locality: Near Canon City, Colorado.

Horizon: Member? Morrison Formation.

Biostratigraphy: Zone?

Age: Age?, Stage?, Malm Epoch, Late Jurassic.

Material: Dorsal vertebrae centra.