This 25-foot-long discovery suggests that predators sank farther than we realized



Scientists have made a composite of it <em>Siamraptor</em> skull bones found so far. "height =" 899 "src =" https://www.popsci.com/resizer/r87iY7yYn8NcIZKDdPjHSOtqh_g=/arc-anglerfish-arc2-prod-bonnier.s3.amazonaws.com/public/3E56ZJRZUKX72KREW7IIAIC. jpg "width =" 1200 "/></p>
<caption>Scientists have made a composite of it <em>Siamraptor</em> skull bones found so far. (Chokchaloemwong et al., 2019 /)</caption>
<p>A unique 25-foot Reptar dinosaur dating from the early Cretaceous was recently discovered in Khorat, Thailand, a new study in the journal <em>PLOS ONE</em> References.</p>
<p>It was named <em>Siamraptor suwati</em>, this dinosaur is a very primitive member of the family Carcharodontosaurus, a type of knife-like predator found mainly around North Africa some 100 million years ago. It is also the first definitive theropod of its kind ever found in Southeast Asia, according to the newspaper.</p>
<p>Scientists from Japan-Thailand Dinosaur project discovered a set of <em>Siamraptor</em> Bones in 2007, says study author Duangsuda Chokchaloemwong, a lecturer at Nakhon Ratchasima Rajabhat University in Thailand. "From [the] the first bone we found, we [knew] this is an important sample, he explains.</p>
<p>Chokchaloemwong and his colleagues have uncovered a total of 22 bones over six years, including skull, spine, limb and hip remnants of at least four individual dinosaurs. The osteoporotic clues helped them locate ancient creatures in a previously unknown genus Carcharodontosauria.</p>
<p>"This shows, though it does not prove, that <em>Siamraptor</em> looking for packages or family groups and maybe even collaborating to reduce prey, "says Matt Lamanna, a paleontologist and dinosaur researcher at the Carnegie Museum of Natural History, who was not involved in the project.</p>
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The complete composite shows the wide sample. (The scale represents just over three feet) (Chokchaloemwong et al., 2019 /)

Siamraptor is a key member of the Carcharodontosaurus group, meaning that the plasma represents a very early evolutionary tear from the rest of the pack. The study reports differences in its anatomy from similar dinosaurs – including a cavity in its jaw and a small hole in the cervical and posterior dorsal vertebra from the base of the nerve spine.

Soki Hattori, a research author and professor at Japan's Fukui Prefecture University, told Popular science by email, that it took about six years to convert the findings into a document recognizing the new genealogy.

To date, only 12 species of dinosaurs have been discovered in Thailand, with Siamraptor being the largest, says Chokchaloemwong. Even more fascinating is the fact that this species has been discovered in Southeast Asia – a long way from the earliest fossils of Carcharodontosauria in Africa and Europe. Scientists are not sure how this species ends up in Thailand, but we note that similar dinosaurs had spread to different parts of the world.

"Therefore, it expands our knowledge of the distribution of this group, which includes the largest livestock that has ever existed, in time and space," says Hattori.

Going forward, researchers will continue to dig in the area, looking for more clues about the creatures that lived there and how exactly they reigned over the landscape.