According to Live Science, before the discovery of this new species, the only known relatives of the T-Rex were a pair of tyrannosaurs named Tarbosaurus bataar and Zhuchengtyrannus magnus ...

Whether T.rex was clad in scales ... The group included Albertosaurus, Gorgosaurus, Daspletosaurus, Tarbosaurus, as well as the iconic T. rex. Follow Helen on Twitter.