A lightly built toothless bipedal dinosaur of the late Cretaceous period, adapted for running and somewhat resembling an ostrich. Also called ornithomimosaur.
- Infraorder Ornithomimisauria, suborder Theropoda, order Saurischia: several genera, including Gallimimus, Ornithomimus, and Struthiomimus.
- Despite the reptile's resemblance to an ostrich dinosaur, or ornithomimid, Effigia is actually some 80 million years older.
- Ankle aside, Effigia had large eyes, a long tail, and a toothless beak - not unlike the ostrich dinosaurs.
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Syllabification: os·trich di·no·saur
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