Check your subscription status, update your details and more. Discovery of T. rex’s cousin upends our understanding of tyrannosaur evolution A dinosaur that is new to science has features of both subfamilies of the tyrannosaur group, complicating our understanding of how they evolved An artist’s illustration of the new-to-science _Tromerosaurus_ dinosaur hunting some juvenile _Brachylophosaurus_. Their parents aren’t pleased A new species of tyrannosaur has been discovered by scientists in Canada.
Fossils of the carnivorous dinosaur _,_ a cousin of _Tyrannosaurus rex_, suggest it lived 77 million years and was 8 metres long with lengthy, lean legs. This is a rare addition to an unusual branch of the tyrannosaur family tree and complicates our understanding of how these dinosaurs evolved. Tyrannosauridae, a family of dinosaurs, split into two subfamilies: tyrannosaurines, made up of _T. rex_ and other stocky, heavy species with relatively long heads, and albertosaurines, which had relatively short skulls and lighter builds.
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