Zhuchengtyrannus (meaning Tyrant from Zhucheng) is an extinct genus of tyrannosaur that lived in China from 83.6-73.5 MYA, existing for 10.1 million years. It contains a single species, Zhuchengtyrannus Magnus, that could weigh up to 5.5 tons. Zhuchengtyrannus was originally listed as a species of Tyrannosaurus under the name Tyrannosaurus Zhuchengensis. It was later placed into the genus Tarbosaurus, keeping the last half of its original scientific name. Eventually, it was placed into Zhuchengtyrannus under the name Zhuchengtyrannus Magnus, therefore invalidating Tarbosaurus Zhuchengensis.
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