nhandumirim (meaning "small rhea" in the tupi language) is a genus of saurischian dinosaur from the carnian age of late triassic brazil. the type and only species, nhandumirim waldsangae, is known from a single immature specimen including vertebrae, a , pelvic material, and a hindlimb found in the santa maria formation in rio grande do sul. "nhandumirim" is differentiated from other santa maria dinosaurs such as "staurikosaurus" and "saturnalia" on the basis of its more gracile, long-legged proportions and several more specific skeletal features. it also possessed several unique features compared to other early dinosaurs, such as long keels on vertebrae at the base of the tail, a straight metatarsal iv, and a short brevis fossa of the ilium and dorsolateral trochanter of the femur. several features of the tibia led the describers of the genus and species to consider "nhandumirim" "waldsangae" the earliest theropod, but some analyses offer alternative positions within saurischia.