A recent study revealed a new species of huge carnivorous dinosaur belonging to the genus Allosaurus, where allosaurus jimmadseni was unveiled in January this year at the Museum of Natural History in Utah, USA.
Details of that study, published in the journal "Pierre Jay", revealed that Allaumus Jamesadini possesses a number of features that qualify him to be distinguished from other types of alsorors.
It also showed that it settled in western North America during the late Jurassic period some 152-157 million years ago, which makes this species the oldest known allosaurus.
The story of the discovery of this dinosaur dates back to the early 1990s, when ancient paleontologist George Engelman discovered the first fossil specimens of this allosaur in the mid-summer of 1990 with the National Monument of Dinosaurs in northeastern Utah.
It took four years to extract the first skeleton of that dinosaur between 1990 and 1994, as the mass of the rock that contained the dinosaur reached 2,700 kilograms. That first discovered skeleton missed the head of a dinosaur, but it included the bones of toes and some of the vertebrae of the tail. The skull was later discovered in 1996 using a radiation detector by Ramal Jones.
|A dinosaur "Allosaur Jimamesenyi" discovered in Utah, United States, with a distinctive form of centuries extending from the eyes to the nose (University of Utah)|
Despite these discoveries over a quarter of a century, scientists believed that these fossils belong to another type of Allosaurus dinosaur called "Allosaurus fragilis". However, the new study showed that these fossils belonged to a different type is Allosaur Jimadsenyi, who appeared on the surface of the planet before Allosaurus Fragellis.
Mark Lowen, associate professor at the Department of Geology and Geophysics at the University of Utah and one of the study participants - via the press release - explains, "In the past, ancient paleontologists believed that there was only one species of Allosaurus that lived in North America in the Jurassic era, but this study shows that there are two types of Allosaurus dinosaurs.
He added, "The dinosaur Allosaur Jimadessini recently appeared on the surface of the planet at least 5 million years ago from its relative, the dinosaur Allosaur Fragheles."
There are many differences between the structures of Allosaurine Gemadcini and Fragellis, especially with regard to the skull. In general, the Jimamesenian skull is lighter and weaker, as it is short, narrow and narrow-sided with a flat surface at the bottom of the skull under the eyes.
In addition to this, the head of Allosaur Jimameseny is distinguished by the presence of a distinctive form of pods extending from the eyes to the nose.
|The ancient paleontologist at the University of Utah James Madsen, whose new dinosaur is called (University of Utah)|
Meat eaters on two legs
The new dinosaur, Jimadssini, acquired his name to commemorate the ancient paleontologist at the University of Utah James Madsen, and the Latin word "Alosour" means "distinguished lizard", because its skeleton possesses several features that differ from the rest of the dinosaurs.
This dinosaur belongs to the carnivorous dinosaurs that run on two legs, as the Allosaurus Jimameseni had two relatively long legs beside two long arms that ended with three sharp claws. He also had a large head of 80 sharp teeth. It has a length of about 8 to 9 meters, and an estimated weight of about 1.8 tons.
This dinosaur inhabited the semi-arid flood plains of the western part of North America in the region that currently includes the states of Utah, Colorado and Wyoming. As this dinosaur was considered the highest and most common predator in the ecosystem in which it lived.
Finally, what is most surprising in this discovery is that despite the lapse of nearly 30 years since the first fossils of Allosaurus were found, it has been described as a special species of dinosaur recently.
Daniel Chor, a retired ancient paleontologist and a study participant, commented, through the press release, "Getting to know a new species of dinosaur whose fossils have been carefully studied for a long time is a very exciting thing. Dinosaur Allosaurus Gemadcini is a great example of how much more remains What to learn about the world of dinosaurs.