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Nanuqsaurus (meaning “Polar Bear Lizard”) is a genus of tyrannosaurid from the Late Cretaceous of Alaska. The fossils were found in the Prince Creek Formation and described in 2014 by Anthony R. Fiorillo and Ronald S. Tykoski, making this a very recent discovery. The original fossils (a partial skull) were referred to Gorgosaurus and then Albertosaurus after being found in 2006. The type species is N. hoglundi. It is a medium-sized predator, at 20 feet (6 metres) long. The shape of he skull showed that it was closely related to Tyrannosaurus. It is closer to Lythronax, Tarbosaurus, and Zhuchengtyrannus.

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