A new study based on private fossils claims that Tyrannosaurs are kings, queens, and emperors.
genus could have spun off into several species, says Paul Sereno, a paleontologist at the University of Chicago who also wasn’t involved in the study. Just like the assortment of today’s predators roaming the African Serengeti, from lions to cheetahs to leopards, the top carnivores of the late Cretaceous period could have similarly diverged.
But two bodily features aren’t enough to tell different species apart, says Thomas Carr, a vertebrate paleontologist at Carthage College in Kenosha, Wisconsin, who didn’t participate in the study. Carr previously analyzed
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