Wasn’t Tyrannosaurus Rex the only one? Science

Wasn't Tyrannosaurus Rex the only one?  Science

Tyrannosaurus was the ultimate hunter and the most famous of all dinosaur species. The dinosaur has appeared on the silver screen several times. Researchers now claim that not only the T-Rex, but three different species of tyrannosaurs roamed the earth.


Latest update:
05-03-22, 15:30

The Guardian, VRT NWS, De Morgan, Reuters

Tyrannosaurus rexus, which translates as the king of the lizard lizard, was first described in 1905, and was the only species of the genus Tyrannosaurus to date. But three researchers, led by American paleontologist Gregory Paul, now suggest that there are two other species in the genus: the Tyrannosaurus imperator, the loosely translated dictator lizard emperor, and the tyrannical lizard queen. A team of paleontologists examined the bones and teeth of 37 Tyrannosaurus fossils and recorded several abnormalities.

“For more than a century, all specimens have been placed in one species, without scrutiny, and the first and only analysis shows that the variation in tyrannosaurus is greater than the level of the dinosaurs, which in turn indicates that the final extinction of the dinosaurs into two species before the final extinction of the dinosaur into two species before further evolution into two species” .

A sister breed and an ancestor

Researchers now say that the difference between thighs and teeth does not refer to different dinosaurs, but to a different species in the genus Tyrannosaurus. That is why the team recommends ‘Tyrannosaurus imperator’ and ‘Tyrannosaurus regina’.

According to researchers, the Importer or Emperor is said to be the oldest and the longest living species. The animal has relatively firm thighs and four small incisions in the lower jaw. Rex and Regina have only two injuries. They would have been the youngest item of the impeller. Regina had slim thighs and, according to researchers, a slimmer body. In other words, the T-Rex would have had an ancestor and a sister breed.

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However, Paul and his team agree that the observed variations may also be due to individual differences in specific fossils. They can be very intense, researchers say. Paul compares the observed differences with the differences between the tiger and the lion. “Lions and tigers belong to the same genus, Panthera, but because of the differences, they are recognized as separate species,” Paul said.

See also: The T-Rex ran slower than humans

Other paleontologists are not convinced

In the opinion of other paleontologists, the new study conducted by Paul and his team may not be correct. They argue that the researchers came to conclusions very quickly. “I understand the temptation to divide the T-Rex into different species because there are some differences in the bones that we know of. But in the end, for me, that difference is very small. Until I see strong evidence, it’s T-Rex for me, ”Stephen Brusat, a paleontologist at the University of Edinburgh, told the British weekly New Scientist this week.

Thomas Carr, a paleontologist at Carthage College, also thinks the research is incorrect. He conducted a study in 2020 on possible variants of the genus Tyrannosaurus but found no clues. “I think they see what they want to see,” he says in the same magazine. “If their species is valid, they need to be identified with more than two features: almost every detail must be different.”

What is Tyrannosaurus?

Tyrannosaurus lived in the western part of present-day North America, in the last Cretaceous of the dinosaur age. About 66 million years ago, all dinosaurs except birds became extinct due to the impact of an asteroid on Earth.

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With a gigantic head, frightening teeth and gigantic bite power, the T-Rex was the ultimate hunter of all dinosaurs. The T-rex had two strong legs, but small arms hanging from the upper body.

The largest tyrannosaurus we know of to date is Sue. It is on display at the Fields Museum in Chicago. Sue is well preserved and almost finished, which is rare. According to this new study, Sue will not be a Tyrannosaurus Rex, but a Tyrannosaurus importer.

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