Tyrannosaurs may have hunted in packs like wolves, new research has found
Paleontologists say a mass grave in Utah shows the dinosaurs may not have always been solitary predators as previously thought
Last modified on Tue 20 Apr 2021 00.01 BSTTyrannosaur dinosaurs may not have been solitary predators as long envisioned but more like social carnivores such as wolves, new research announced on Monday has found.Paleontologists developed the theory while studying a mass tyrannosaur death site found seven years ago in the Grand Staircase-Escalante National Monument in southern Utah, one of two monuments that
the Biden administration is considering restoring to their full sizeafter former president Donald Trump shrank them.Using geochemical analysis of the bones and rock, a team of researchers from the University of Arkansas determined that the dinosaurs died and were buried in the same place and were not the result of fossils washing in from multiple areas.
Kristi Curry Rogers, a biology professor at Macalester College, said this research is a “good start” but more evidence would be needed before determining that the tyrannosaurs were living in a social group.Read more“It is a little tougher to be so sure that these data mean that these tyrannosaurs lived together in the good times,” Rogers said. “It’s possible that these animals may have lived in the same vicinity as one another without travelling together in a social group, and just came together around dwindling resources as times got tougher.” headtopics.com
In 2014, Bureau of Land Management palaeontologist Alan Titus discovered the site, which was later named the Rainbows and Unicorns quarry because of the vast array of fossils contained inside. Excavation has been ongoing since the site’s discovery because of the size of the area and volume of bones.
“I consider this a once-in-a-lifetime discovery for myself,” Titus told reporters during a virtual news conference. “I probably won’t find another site this exciting and scientifically significant during my career.”The newsite is the third mass tyrannosaur grave site that’s been discovered in North America and provides even more evidence that tyrannosaurs may have lived in groups, Titus said.
The skull of a tyrannosaur found near the Rainbows and Unicorns Quarry in 2019.Photograph: Dr. Alan Titus/APThe social tyrannosaurs theory began over 20 years ago when more than a dozen tyrannosaurs were found at a site in Alberta, Canada. Another mass death site in Montana again raised the possibility of social tyrannosaurs. Many scientists questioned the theory, arguing that the dinosaurs didn’t have the brainpower to engage in sophisticated social interaction, Titus said.
“Going that next step to understand behaviour and how animals behave requires really amazing evidence,” Joseph Sertich, curator of dinosaurs at the Denver Museum of Nature & Science, said at the news conference. “I think that this site, the spectacular collection of tyrannosaurs but also the other assembled pieces of evidence … pushes us to the point where we can show some evidence for behaviour.” headtopics.com
In addition to the tyrannosaurs, researchers have also found seven species of turtles, multiple fish and ray species, two other kinds of dinosaurs and a nearly complete skeleton of a juvenile Deinosuchus alligator. These other animals do not appear to have all died together.
Palaeontology groups have been among those pushing the federal government to restore the Bears Ears National Monument and Grand Staircase-Escalante to their original sizes to protect the region’s rich paleontological and archaeological record.Interior secretary Deb Haaland visited southern Utah earlier this month as she prepared to submit recommendations on whether to reverse Trump’s decision to downsize the monuments. Titus said he showed Haaland some of the fossils at his lab during her visit and said she “appreciated getting to see the material.”
“The (Bureau of Land Management) is protecting these fossils as national treasures,” Titus said. “They’re part of the story of how North America came to be and how ultimately we came to be.” Read more: The Guardian »
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Cool! 😎 Dear Guardian. When you write a piece about newly published research, PLEASE link to the paper — or AT LEAST include a reference. Failure to do this completely undermines the credibility of your science reporting. Like packs of AI robots, we'll be saying in a couple more years.... Ross are you agree?
A bad situation made worse. Raptors: - You may be big, but we have pack mentality T-Rex: - Hold my wishbone Mother of God! We could also call them the Tory pack. Well, if true, that's...horrifying. Gang mentality Because of course they did...clever...
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Their closest relatives are crocodiles. It's less about team work and more about infighting. How tf would they even figure this out Word 'May' should be translated in to 'We don't know' Or was it a predator trap similar to a tar pit? Here is something we can get nerdy about Dave_Hone
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