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Two new predatory megaraptor dinosaur species related to T. rex in the distant relationship have been identified from fossils from Thailand. Pictured: an artist's impression of the finds
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Two new predatory megaraptor dinosaur species that were far related to Tyrannosaurus rex have been identified from fossils found in Thailand.

The specimens were first dug up 30 years ago, but their significance was not recognized until researchers re-examined the samples stored by the museum.

Both new dinosaurs would have been smaller and more primitive than T Rex, researchers said, but would have produced deadly predators.

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Two new predatory megaraptor dinosaur species related to T. rex in the distant relationship have been identified from fossils from Thailand. Pictured: an artist's impression of the finds

Two new predatory megaraptor dinosaur species related to T. rex in the distant relationship have been identified from fossils from Thailand. Pictured: an artist's impression of the finds

Paleontologists Adun Samathi and Martin Sander from the University of Bonn, Germany, and Phornphen Chanthasit from the Sirindhorn Museum in Thailand worked together to study the remains and bring castings from the fossils to Bonn for further analysis.

They first identified the preserved bones of a new dinosaur that they estimated to have been about six meters long.

& # 39; We were able to assign the bones to a new megaraptor, which we baptized Phuwiangvenator yaemniyomi, & # 39; declares Mr. Samathi.

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The name is derived from both the district in which the remains were excavated, Phuwiang, and the discoverer of Thailand's first dinosaur fossil, the late geologist Sudham Yaemniyom.

Megaraptors were a group of carnivorous, predatory dinosaurs that were closely related to Tyrannosaurus rex.

Most of the P. yaemniyomi fossil bones were excavated by Phu Wiang Fossil Research Center and collaborator Preecha Sainongkham of the Dinosaur Museum in 1993, who found the findings at the Sirindhorn Museum.

However, until recently fossils have never been examined in detail.

& # 39; Five years ago I came across these finds during my research & # 39 ;, said Samathi.

The fossils were first excavated 30 years ago, but their significance was not recognized until the researcher led by Adun Samathi (photo) re-examined the samples stored in the museum
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The fossils were first excavated 30 years ago, but their significance was not recognized until the researcher led by Adun Samathi (photo) re-examined the samples stored in the museum

The fossils were first excavated 30 years ago, but their significance was not recognized until the researcher led by Adun Samathi (photo) re-examined the samples stored in the museum

Samanthi discovered a second unidentified bird of prey in the Sirindhorn Museum collection while hunting additional monsters of P. yaemniyomi in Thailand.

Dubbed Vayuraptor nongbualamphuensis, this second dinosaur would be slightly smaller in life, with an approximate length of approximately 15 feet (4.5 meters).

For comparison, T. rex usually grew to around 39 feet (12 meters) long.

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The V. nongbualamphuensis remains were excavated by a Paladej Srisuk in Phu Wat in 1988.

While the fossilized bones were too thin to be precisely determined V. nongbualamphuensis & # 39; researchers believe that the smaller dinosaur is also related to both P. yaemniyomi and T. rex.

Both newly discovered dinosaur species would have been efficient predators, researchers determined, with P. yaemniyomi probably a fast rider.

Like the Tyrannosaurus, both new dinosaurs would have run on their hind legs.

Unlike their famous family member, however, P. yaemniyomi and V. nongbualamphuensis would have strong arms that ended with long claws, as well as more delicate heads that would have ended in a long muzzle.

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& # 39; Perhaps the situation is similar to that of African big cats & # 39 ;, Samathi said.

& # 39; If Phuwiang venator were a lion, Vayuraptor would be a cheetah. & # 39;

Unlike T. rex, P. yaemniyomi (impression of the artist below, showing the bones found) and V. nongbualamphuensis (above) would have had strong arms that ended with long claws, as well as more delicate heads that in a long time would have finished muzzle

Unlike T. rex, P. yaemniyomi (impression of the artist below, showing the bones found) and V. nongbualamphuensis (above) would have had strong arms that ended with long claws, as well as more delicate heads that in a long time would have finished muzzle

Unlike T. rex, P. yaemniyomi (impression of the artist below, showing the bones found) and V. nongbualamphuensis (above) would have had strong arms that ended with long claws, as well as more delicate heads that in a long time would have finished muzzle

To date, megaraptors have mainly been excavated from Australia and South America.

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& # 39; We compared the Thai fossils with the finds there & # 39 ;, Samathi said.

& # 39; Different characteristics of Phuwiang venator indicate that it is an early representative of this group, & he added.

& # 39; We take this as an indication that the megaraptors are from Southeast Asia and then spread to other & # 39; s regions. & # 39;

The two new dinosaurs will be exhibited to the public on May 28, 2019, in celebration of the tenth anniversary of the Sirindhorn Museum.

The exhibition is opened by the princess Maha Chakri Sirindhorn, of the Thai royal family.

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The full findings of the study were published in the journal Acta Palaeontologica Polonica.

Most of the remains of P. yaemniyomi were excavated in 1993 by the staff of the museum staff Preecha Sainongkham, while the V. nongbualamphuensis fossils were excavated by a Paladej Srisuk in Phu Wat in 1988

Most of the remains of P. yaemniyomi were excavated in 1993 by the staff of the museum staff Preecha Sainongkham, while the V. nongbualamphuensis fossils were excavated by a Paladej Srisuk in Phu Wat in 1988

Most of the P. yaemniyomi remains were excavated from Phu Wiang mountain by museum employee Preecha Sainongkham in 1993, while the V. nongbualamphuensis fossils were excavated by a Paladej Srisuk in Phu Wat in 1988

WHAT DO WE KNOW FROM MEGAR OPERATORS?

The megaraptors were a kind of theropod dinosaurs of medium to large size.

Walking on two legs, the megaraptors had long muzzles, large claws and long, thin metatarsals in their toes.

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Their name is derived from Latin for & # 39; giant thieves & # 39 ;.

To date, megaraptors have mainly been excavated from Australia and South America.

New findings have shown that megaraptors can come from Southeast Asia and then spread to other regions.

The group is far related to Tyrannosaurus Rex.

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