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How did Tarbosaurus compare with Tyrannosaurus rex?
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tyrannosaur
The fossilized remains of Sue, the most complete Tyrannosaurus rex skeleton in the world, on display at the Field Museum of Natural History, Chicago.
Tarbosaurus and Tyrannosaurus rex are closely related tyrannosaur dinosaurs that lived during the end of the Cretaceous Period. While T. rex is the only known tyrannosaur from the late Maastrichtian Age in North America, Tarbosaurus is a very similar form that inhabited Mongolia slightly earlier.1
Both genera share the characteristic features of the group, including an exceptionally large, high skull, very short forelimbs, and teeth with rounded cross sections rather than the blade-like shape found in other theropods. Because of these shared physical traits and their status as large, predatory coelurosaurs, they are often compared as ecological counterparts in their respective regions.21