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Temporal range: Upper Cretaceous
Struthiomimus ROM.jpg
Cast of an S. altus skeleton
at the Royal Ontario Museum
Scientific classification
Kingdom: Animalia
Class: Sauropsida
Superorder: Dinosauria
Order: Saurischia
Suborder: Theropoda
Infraorder: Coelurosauria
Family: Ornithomimidae
Genus: Struthiomimus
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". In Currie, Phillip J., and Koppelhus, Eva (eds.). Dinosaur Provincial Park: a spectacular ancient ecosystem revealed. Bloomington: Indiana University Press. pp. 367–397. ISBN 0-253-34595-2. 
  3. Makovicky, Peter J. (2004). "Ornithomimosauria". In Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.). The Dinosauria (2nd ed.). Berkeley: University of California Press. pp. 137–150. ISBN 0-520-24209-2.  Unknown parameter |coauthors= ignored (|author= suggested) (help)
  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.