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(order Saurischia, suborder Sauropoda)

One of several gigantic dinosaurs recorded from the Late Jurassic, Apatosaurus was a quadruped with a long neck whose total weight reached 30 tonnes. The name Apatosaurus, meaning ‘deceptive lizard’ (derived from the Greek apate meaning ‘deceit’ and saura meaning ‘lizard’), is a senior synonym of Brontosaurus. Animals of 22 m in length have been recorded from the Morrison Formation of N. America.

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