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The largest ornithopods, were the هادروصورياتids شانتونجوصور, a late Cretaceous dinosaur found in the Shandong Peninsula of China, and ماجناباليا from the late Cretaceous of North America. Both species are known from fragmentary remains but are estimated to have reached over 15m (50ft) in length[95][96] and were likely the heaviest non-sauropod dinosaurs, estimated at over 23tonnes.[96]