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Paleontology: Predatory dinosaurs trumped early tyrannosaurs

Paleontology : Predatory dinosaurs trumped early Tyrannosaurs

In Uzbekistan, a dinosaur jaw was found in a museum that suggested a huge predatory dinosaur. The species dominated the food chain of its time even more than the tyrannosaurs of the time. by Daniel Lingenhöhl Ulughbegsaurus uzbekistanensis © Julius T. Csotukistanensis (Excerpt )

Huge serrated teeth, weighing a ton and eight meters long: the predatory dinosaur Ulughbegsaurus uzbekistanensis dominated its ecosystem in what is now Central Asia in the late Cretaceous 90 & nbsp; million years ago. Even the tyrannosaurs of the time couldn't keep up with this carnivore. The giant, which belongs to the Carcharodontosauriden, was twice as large and five times as heavy as the famous lizards. This includes a team led by Kohei Tanaka from the Japanese University of Tsukuba from a well-preserved and equipped jawbone, which the group describes in the journal “Royal Society Open Science”.

The bone was excavated in the Kyzylkum desert in the 1980s, but was not rediscovered and scientifically described in a museum collection until 2019. Tanaka and Co finally named the species after Ulugh Beg, an astronomer, mathematician and sultan who lived in Uzbekistan in the 15th century. Since the size of the jawbones in dinosaurs correlates strongly with the dimensions of the thighbones, the group was able to deduce the overall size of the animal from this.

The predatory dinosaur turned out to be significantly more massive and larger than the tyrannosaur, which was also found in the region at the time Timurlengia, who was “only” four meters long and weighed 170 kilograms. The scientists therefore assume that Ulughbegsaurus uzbekistanensis was at the top of the food chain at the time.

The evidence so far is the last joint of the two groups of predatory dinosaurs. Despite its size and agility, Carcharodontosaurus died out 80 to 90 million years ago, making way for the tyrannosaurs, who then got bigger and heavier – and thus also the top predators in Asia and North America until all dinosaurs became extinct 66 million years ago Years.

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