Coloradisaurus (meaning "Colorados lizard") was a genus of dinosaur from the Late Triassic. It was a prosauropod which lived in present-day Argentina. The type species, C. brevis, was formally described by Jose Bonaparte in 1978. It may in fact be an adult specimen of Mussaurus. Originally named Coloradia, this name had already been assigned to a moth, and so the animal was renamed. Fossils of Coloradisaurus were found in strata dating to the Norian, 221 to 210 million years ago.