Ornithomimus

Ornithomimus (bird mimic) is a genus of dinosaur from the Late Cretaceous of North America. Ornithomimus velox was named on the basis of a foot and partial hand from the Maastrichtian Denver Formation, but better material has since been found in Canada, including the Edmontonian-age Ornithomimus edmontonicus, and an excellent articulated specimen (species unknown) from Dinosaur Provincial Park. Like other ornithomimidae, Ornithomimus is characterized by a three-toed foot, long slender arms, and a long neck with a birdlike skull. It differs from other ornithomimids such as Struthiomimus in having very slender, straight hand and foot claws, and in having metacarpals and fingers of similar lengths. Its hands are remarkably sloth-like in appearance, which led Henry Fairfield Osborn to suggest that they were used to hook branches during feeding.