<div data-thumb = "https://3c1703fe8d.site.internapcdn.net/newman/csz/news/tmb/2019/smallhornedd.jpg" data-src = "https: //3c1703fe8d.site.internetcdn .net / newman / gfx / news / hires / 2019 / smallhornedd.jpg "data-sub-html =" The artist's rendering of Auroraceratops shows his bipedal posture as well as beak and frill that characterize it as a member of Horned Dinosaurs Paleontologists from Penn led a team that characterizes this species, discovered in China. Credit: Robert Walters ">
Many dinosaur species are known from rare remnants, with some estimates suggesting that 75% are known from five or fewer individuals. Auroraceratop's rugosus was typical in this regard when named in 2005 based on a single skull from the Gobi desert in northwestern China. But that is no longer the case.
Over the next few years, scientists have recovered fossils from over 80 individual Auroraceratops, which means that this small herbivore comes into the path of the most famous dinosaurs. It is now one of the few very early horned dinosaurs known from complete skeletons. In a collection of articles appearing as Memoir 1
8 in the Journal of Vertebrate Paleontology this week, researchers from the University of Pennsylvania, Indiana University of Pennsylvania, describe the Chinese Academy of Sciences, Gansu Agricultural University and other institutions Anatomy, age, conservation and development of this great collection of Auroraceratops.
Their analysis places Auroraceratops, which lived about 115 million years ago, as an early member of the group Ceratopsia or horned dinosaurs, the same group that Triceratops belongs to. In contrast to Triceratops, Auroraceratops is small, about 49 inches long and 44 inches long and weighs on average 34 pounds (15.5 kilos). While Auroraceratops has a short frill and beak that characterizes it as a horned dinosaur, it lacks the "true" horns and extensive cranial decoration of Triceratops.
"When I first saw this animal back in 2004, I immediately knew that it was a new type that had never seen before and was very excited about it," says paleontologist Peter Dodson, senior author at work and professor with appointments at Penn's Veterinary Medicine School. and the College of Arts and Sciences. "This monograph on Auroraceratops is longed for." In 2005, Dodson and his former students honored Hai-Lu You and Matthew Lamanna Auroraceratops (in Latin, "the dawn's horny face") to honor Dodson's wife Dawn Dodson, you, along with Chinese researcher Da-Qing Li, followed both authors of the current work and co-operative up the discovery and identified more than 80 additional examples of the species, from closest hatchlings to adults.
<div data -thumb = "https://3c1703fe8d.site.internapcdn.net/newman/csz/news/tmb/2019/1-smallhornedd.jpg" data-src = "https://3c1703fe8d.site.internapcdn.net/newman /gfx/news/hires/2019/1-smallhornedd.jpg "data-sub-html =" Researchers were fortunate to have a robust set of fossils of Auroraceratops to use to characterize the dinosaur, complete skeletons. More than 80 people of the species have been identified since it was originally named 15 years ago. Credit: Scott Hartman ">
Eric Morschhauser, lead author now at the Faculty of Indiana University of Pennsylvania, completed his Ph.D. during Dodson at Penn, focused on characterizing Auroraaceratops using this robust dataset.
Auroraceratops represents the only horned dinosaur in the group Neoceratopsia (the line leading to and including the great bodily ceratopsians as Triceratops) from the early war with a complete skeleton. This exclusivity is significant, the researchers say, since hornedosaurs turned from being bipedal, as well as their ancestors, to being the great rhino-like quadrupole-like animals most like horned dinosaurs in the latter part of the war.
"Before this study, Morschhauser says," we must rely on Psittacosaurus, a more remote and unusual ceratopsian, for our image of what the last bipedal ceratopsian looked like. "
Aurora Aceratops Preserve Multiple Skeletal Functions , like a curved femur and long thin claws, which are undoubtedly associated with bipedal walking in some dinosaurs. "" It can now give us a better idea of the starting point for the changes between bipedal and quadrupal valeratopsis, "adds Morschhauser.  Peter Dodson is a professor of anatomy at the University of Pennsylvania School of Veterinary Medicine at the Department of Biomedical Sciences and a professor of paleontology at the School of Arts and Sciences and Earth and Environmental Sciences.
Triceratops gets a cousin: Researchers identify another horned dinosaur
Hailu You et al, Introduction of Mazongshan Dinosaur Fauna, Journal of Vertebrate Paleontology (2019). DOI: 10.1080 / 02724634.2017.1396995
University of Pennsylvania
Small horned dinosaur from China, a Triceratop relative, went on two feet (2019, July 12)
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