US EditionNew species of dinosaur discovered that 'rewrites' T.rex family tree
- Paleontologists discovered a new mid-size tyrannosaur species named Khankhuuluu mongoliensis in Mongolia, and published the findings June 11 in Nature.
- This discovery reclassified partial skeletons found in 1972-73 that were originally identified as Alectrosaurus, revealing an overlooked species from about 86 million years ago.
- Khankhuuluu stood about 2 meters tall at the hips, weighed around 750 kilograms, had long slender legs, and a lightly built skull unlike later giant tyrannosaurs.
- Co-Author Jared Voris called Khankhuuluu a "transitional form" between smaller ancestors and giant tyrannosaurs, while Darla Zelenitsky described it as an overlooked "prince".
- The find supports the Asian origin and migration theory for tyrannosaur evolution, showing mid-grade species set the stage for apex predators like Tyrannosaurus rex.
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Scientists have discovered a new species of dinosaur, Khankhuuluu mongoliensis, which represents an early and lighter ancestor of Tyrannosaurus rex and changes the current understanding of its evolutionary tree.
·Belgrade, Serbia
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Fossils of T rex ancestor in Mongolia reveal clues to dinosaur king evolution
Khankhuuluu. Credit: Julius Csotonyi. Fossils found in Mongolia of a new dinosaur species may help palaeontologists explain the evolution and dispersal of the group which includes Tyrannosaurus rex. T. rex is often called the “king of the dinosaurs” for good reason. It was the apex predator for 2 million years before it and all the non-avian dinosaurs went extinct 66 million years ago. T. rex was massive – measuring 4m tall, 12m long and 9 tonne…
·Washington, United States
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