Temporal range: Upper Cretaceous
|Cast of an S. altus skeleton |
at the Royal Ontario Museum
Struthiomimus had a typical build and skeletal structure for an ornithomimid. It only differed from Ornithomimus in proportions and anatomical details. It is known from several skeletons and skulls, 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).
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. 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. The tail was stiff and was probably used for balance. It ground food up in its gizzard, and may have been herbivorous or omnivorous.
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- 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)
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