Arcusaurus is an extinct genus of sauropodomorph dinosaur that lived in South Africa during the Early Jurassic period. Named in 2011, it is known from fragmentary remains of two juvenile individuals, including a partial skull and some limb bones and vertebrae. Arcusaurus was a herbivore and is notable for its unusual mix of primitive and derived characteristics, which has led to debate about its exact position within the sauropodomorph family tree.
