Deinocheirus (DYE-no-KYE-rus, Greek: 'terrible hand') was a theropod dinosaur which lived in what is now southern Mongolia, during the Late Cretaceous Period. The only known fossil remains are a single pair of massive, 2.4 m (8 ft) forelimbs, with 25 cm (10 in) long claws and the remains of some ribs and vertebrae. Deinocheirus was named by Halszka Osmólska and Ewa Roniewicz in 1970. The type species and only named species is D. mirificus (Latin: 'unusual', 'peculiar'). Replicas of the fossilized 'arms' are currently on display at the Paleontological Museum of the University of Oslo, Norway, the American Museum of Natural History, New York, the Natural History Museum, London and the Dinosaur Museum, Blanding, Utah.