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Huge new "shark tooth" dinosaur found



Today, the land near Ban Saphan Hin in central Thailand is pollinated with thin reddish soil on which local farmers grow corn and tapioca. More than 113 million years ago, the area was home to ancient floodplains that were terrified by a fearsome dinosaur with shark-like teeth.

<span class = "image" data-attrib = "Courtesy of Chokchaloemwong et al., 2019" data-caption = "

Excavations in Thailand revealed Siamraptor suwati a newly discovered species The creature was one of the Carcharodontosaurs, a group known for its serrated, knife-like teeth.

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14 "data-m =" http://www.msn.com/ { "i": 114, "p": 113, "n": "openModal", "t": "articleImages", "o": 1} ">  Close up of an animal: Excavations in Thailand yielded Siamraptor suwati, a newly discovered type of predatory dinosaur. The creature was one of the Carcharodontosaurs, a group known for their serrated, knife-like teeth. © Courtesy of Chokchaloemwong et al., 2019

Excavations in Thailand revealed Siamraptor suwati a newly discovered species of predator dinosaur. The creature was one of the Carcharodontosaurs, a group known for their serrated, knife-like teeth.

Described Today in the Magazine PLOS One The Newly-Discovered Predator – Named Siamraptor suwati is the most complete dinosaur of its kind and age ever in Southeast Asia was found. The bones of the 25-foot beast complement a number of important dinosaur finds from the region and shed light on how a large group of predatory dinosaurs spread in antiquity.

"It's one of the most important Thai animals dinosaurs ever found," said Steve Brusatte, a paleontologist at the University of Edinburgh who reviewed the study for publication, in an email.

A team led by Duangsuda Chokchaloemwong, a researcher at the Thai Nakhon Ratchasima Rajabhat University, studied over the bone and found that the skeleton is shot through with air bags. This would have made the frame of the dinosaur easier and perhaps helped it breathe faster, an idea that could put future bone scans to the test.

"It would have been a wild, fast, dynamic animal," says Brusatte. 19659002] <span class = "image" data-attrib = "Courtesy of Chokchaloemwong et al., 2019" data-caption = "

Researchers scaled the 22 newly discovered fossils to the skeleton of Siamraptor suwati ] The scale bar is one meter or about 3.3 feet.

"data-id =" 115 "data-m =" http://www.msn.com/ {"i": 115, "p": 113, "n": "openModal", "t": "articleImages", "o": 2} ">  Close up of a logo: researchers scaled the 22 newly discovered fossils to the skeleton to reconstruct from Siamraptor suwati. The scale is one meter or about 3.3 feet. © Courtesy of Chokchaloemwong et al., 2019

Researchers scaled the 22 newly discovered fossils to reconstruct the Siamraptor suwati skeleton. The scale is one meter.

Teeth like those of a shark

Dozens of millions of years before giant tyrannosaurs like T. When rex emerged, another group of large predator dinosaurs ruled: the allosauroids. Among these carnivorous heavyweights was a group called Carcharodontosaurs (Kar-KA-Ro-Don-Toe-Sores), which were the largest predators for most chalks.

"It was only with the demise of the Carcharodontosaurs that small tyrannosaurs grew big and took on the role of the apex predator," says Brusatte.

Evidence for the group first emerged from the Egyptian Sahara in 1914 when an expedition was funded. The German paleontologist Ernst Stromer found dinosaur teeth that were jagged like steak knives. The Forbidden Chompers reminds Stromer of Carcharodon the shark genus to which the Great White Shark belongs and named him the Dinosaur in 1931 Carcharodontosaurus saharicus .

In the following decades paleontologists found other relatives of Stromer's shark tooth dinosaurs, including some of the largest predator dinosaurs ever to live. Until recently, no well-preserved Carcharodontosaurier were found in Southeast Asia. Was this gap the sign of a true absence or were their remains simply uncovered? To find out, scientists had to start digging.

Digging Out a Dinosaur

In recent decades, Thai paleontologists from the dinosaur era have found much fossil material. Since 2007, an international team called Japan-Thailand Dinosaur Project has named two new herbivorous dinosaurs Ratchasimasaurus and Sirindhorna as well as an ancient relative of alligators and crocodiles [gefunden19659006] "This project is of paramount importance to uncover the evolutionary history of dinosaurs in the early Cretaceous, "says an e-mail from co-author Soki Hattori, paleontologist at the Japanese Fukui Prefectural Dinosaur Museum. "The comparison of early Cretaceous dinosaurs from Japan and Thailand allows us to understand them, for example, the history of the geographic radiation of dinosaurs."

The researchers found the herbivorous Sirindhorna nearby Ban Saphan Hin, a village in Nakhon Ratchasima Province, located in a rocky outcrop 113 to 125 million years ago. The highs reached 95 degrees Fahrenheit when the team dug, and the construction site struck with constant knocking of rocks.

The hard work paid off: in addition to the appearance of Sirindhorna the excavation was uncovered by 22 disarticulated pieces of a predatory dinosaur. The fossils were from at least four different individuals and included some spines, parts of the limbs and hips, and fragments of the skull, including a well preserved lower jaw to the right. Chokchaloemwong and her colleagues rummaged about the bones and found they belonged to a Carcharodontosaur.

The discovery shows that Carcharodontosaurs were widespread on Earth in the early Cretaceous. Many other groups of dinosaurs, including other allosauroids, expanded their assortment until then. At that time, North America was connected to Europe and Asia, so that the dinosaurs of the three continents could mix and mingle.

Siamraptor is also important to Thailand itself, says Chokchaloemwong: "I hope this discovery will make it clear to the Thai people that our country has so many fossils [we] that the younger generation still has to discover it , "


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