Hadrosaurids or duck-billed dinosaurs are members of the superfamily Hadrosauroidea, and include ornithopods such as Edmontosaurus and Parasaurolophus.
They were common herbivores in the Upper Cretaceous of Asia, Europe, and North America.
They are descendants of the Upper Jurassic/Lower Cretaceous iguanodontid dinosaurs, and have similar body plans.
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