Ornithomimus

Ornithomimus is a genus of long-legged, toothless theropod dinosaurs from Late Cretaceous North America. Its lightly built body and ostrich-like proportions suggest adaptation for fast running.

Ornithomimidae: Ornithomimidae is a family of slender, long-legged theropod dinosaurs, including Ornithomimus and its close relatives. Ornithomimus is a representative member of this family.
Cursoriality: Cursoriality is adaptation for efficient terrestrial running, often involving elongated limbs and reduced distal limb mass. Ornithomimus's long legs and light build are linked to running.
Ornithomimus edmontonicus: Ornithomimus edmontonicus is a species of ornithomimid dinosaur known from Late Cretaceous deposits in Alberta. It is the best-known species and is represented by relatively complete skeletons.
Struthiomimus: Struthiomimus is a genus of ornithomimid theropods known from Late Cretaceous North America. It is a closely related genus often compared with Ornithomimus.
Theropoda: Theropoda is a diverse dinosaur group that includes birds and many extinct meat-eating or omnivorous forms. This broader dinosaur group contains Ornithomimus and its family.
Bipedalism: Bipedalism is locomotion or posture using two hind limbs for support and movement. Ornithomimus moved on its two powerful hind limbs.
Ornithomimus velox: Ornithomimus velox is the type species of Ornithomimus, named from fossils found in Colorado. Its naming established the genus, although its original remains were incomplete.
Gallimimus: Gallimimus is a large ornithomimid theropod dinosaur known from Late Cretaceous Mongolia. This Asian relative shows that ornithomimids ranged beyond North America.
Arctometatarsalian: Arctometatarsalian describes a foot in which the upper part of the middle metatarsal is pinched between its neighbors. This foot arrangement occurs in ornithomimids and other agile theropods.
Ostrich: The ostrich is a large, flightless bird native to Africa and the fastest living bird on land. Its body plan inspired Ornithomimus's name and offers a living, though imperfect, comparison.

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