Ornithomimus

Ornithomimus Temporal range: Late Cretaceous (Campanian to Maastrichtian), 76.5–66 Ma[1] PreꞒ Ꞓ O S D C P T J K Pg N
Mounted O. edmontonicus skeleton, Royal Ontario Museum
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Clade:	Dinosauria
Clade:	Saurischia
Clade:	Theropoda
Clade:	†Ornithomimosauria
Family:	†Ornithomimidae
Genus:	†Ornithomimus Marsh, 1890
Type species
†Ornithomimus velox Marsh, 1890
Other species
†O. edmontonicus Sternberg, 1933 †O. samueli? (Parks, 1928)

Ornithomimus (/ˌɔːrnɪθəˈmaɪməs, -θoʊ-/;^[2] "bird mimic") is a genus of ornithomimid theropod dinosaurs from the Campanian and Maastrichtian ages of Late Cretaceous Western North America. Ornithomimus was a swift, bipedal dinosaur which fossil evidence indicates was covered in feathers and equipped with a small toothless beak that may indicate an omnivorous diet. It is usually classified into two species: the type species, Ornithomimus velox, and a referred species, Ornithomimus edmontonicus. O. velox was named in 1890 by Othniel Charles Marsh on the basis of a foot and partial hand from the Denver Formation of Colorado. Another seventeen species have been named since then, though almost all of them have been subsequently assigned to new genera or shown to be not directly related to Ornithomimus velox. The best material of species still considered part of the genus has been found in Alberta, representing the species O. edmontonicus, known from several skeletons from the Horseshoe Canyon Formation. Additional species and specimens from other formations are sometimes classified as Ornithomimus, such as Ornithomimus samueli (alternately classified in the genera Dromiceiomimus or Struthiomimus) from the earlier Dinosaur Park Formation.