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Temporal range: Upper Cretaceous
Struthiomimus ROM.jpg
Cast of an S. altus skeleton
at the Royal Ontario Museum
Scientific classification

Osborn, 1917
Struthiomimus, Oxford University Museum of Natural History
Skull of Struthiomimus altus

Struthiomimus was a long-legged, ostrich-like dinosaur of the ornithomimid family. It lived in what is now Alberta, Canada, during the Upper Cretaceous, about 75 to 65 million years ago.

Description[change | change source]

Struthiomimus had a typical build and skeletal structure for an ornithomimid. It only differed from Ornithomimus in proportions and anatomical details.[1] It is known from several skeletons and skulls,[2] and its size is estimated as about 4.3 metres (14 ft) long and 1.4 metres (4.6 ft) tall at the hips, with a weight of around 150 kilograms (330 lb).[1]

As with other ornithomimids, it had a small slender head on a long neck. The neck made up about 40% of the length of the body in front of the hips.[2] Its eyes were large and its jaws were toothless. Its vertebral column had ten neck vertebrae, thirteen back vertebrae, six hip vertebrae, and about thirty-five tail vertebrae.[3] The tail was stiff and was probably used for balance.[4] It ground food up in its gizzard, and may have been herbivorous or omnivorous.[5]

References[change | change source]

  1. 1.0 1.1 Paul, Gregory S. (1988). "Genus Ornithomimus". Predatory dinosaurs of the world. New York: Simon & Schuster. pp. 384–394. ISBN 0-671-61946-2.
  2. 2.0 2.1 Currie, Philip J. (2005). "Theropods, including birds". Dinosaur Provincial Park: a spectacular ancient ecosystem revealed. Bloomington: Indiana University Press. pp. 367–397. ISBN 0-253-34595-2. Unknown parameter |editors= ignored (help)
  3. Makovicky, Peter J.; Kobayashi, Yoshitsugu and Currie, Philip J. (2004). "Ornithomimosauria". In Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.) (ed.). The Dinosauria (2nd ed.). Berkeley: University of California Press. pp. 137–150. ISBN 0-520-24209-2.CS1 maint: multiple names: authors list (link) CS1 maint: extra text: editors list (link)
  4. Osborn, Henry Fairfield (1917). "Skeletal adaptations of Ornitholestes, Struthiomimus, Tyrannosaurus" (pdf). Bulletin of the American Museum of Natural History. 35: 733–771.
  5. Barrett, Paul M 2005. The diet of ostrich dinosaurs (Theropoda: Ornithomimosauria). Palaeontology. 48 (2): 347–358.