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nounhuge quadrupedal herbivorous dinosaur common in North America in the late Jurassictype of:
Definition that contains apatosaur
- sauropodomorpha gigantic herbivorous dinosaurs having huge bodies with long necks and small heads: Prosauropoda and Sauropoda (apatosaurus, diplodocus and titanosaurs)
- suborder sauropodomorpha gigantic herbivorous dinosaurs having huge bodies with long necks and small heads: Prosauropoda and Sauropoda (apatosaurus, diplodocus and titanosaurs)