The Allosaurus was one of the most famous Jurassic carnivorous dinosaurs, and paleontologists discovered a large number of fossils of this species in a quarry in Colorado, the central United States. These fossils included a large number of broken bones with mysterious bites, after analysis of the bites revealed that the bites revealed an extremely little-known aspect of the dinosaur. long Allosaurus.
The Mygatt-Moore quarry located in Colorado, USA is home to an abundance of dinosaur fossils, and since the dinosaur fossils were unearthed here in 1981, a total of 2,368 bone fossils have been found. detect. From a stratigraphic point of view, the Mygatt-Moore Quarry belongs to the Morrison Formation, possibly originating in the Late Jurassic period 150 million years ago – The Morrison Formation spread throughout the western United States today and is one of the places where the highest amount of dinosaur fossils in the United States.
One of the quarries in the Mygatt-Moore quarry, from a stratigraphic point of view, the Mygatt-Moore quarry belongs to the Morrison Formation.
The Morrison Formation is a special geological land containing many Late Jurassic sedimentary rocks found in the western United States, home to the largest source of dinosaur fossils in North America. It consists of silty rocks, sandstone, siltstone and limestone, which are light gray, greenish gray, or red.
Although a large number of dinosaur fossils have been found, a large amount of them are only fragments and very few bones are intact. After studying specific fossils, paleontologists were surprised to find that 29% of the fossils had a bite.
In fact, the detection of bites on fossils is not uncommon, but the rate of bites in fossil samples at the Mygatt-Moore quarry is exceptionally high and 6 times higher than the fossilized sites. other rocks in the Morrison Formation. More than 20,000 fossils were found in another fossil site in the Morrison Formation in Cleveland-Lloyd Dinosaur Quarryin, but only 5% of them were found to have bites.
Traces of bites on fossils.
Through initial observations, paleontologists speculated that the perpetrators of these bites belonged to the Allosaurus dinosaurs with a body length of more than 8 meters. This is a dinosaur that possesses fast speed and strong teeth, they can defeat a large dinosaur by attacking and biting into a weak spot.
And a few of the bites in it belonged to another carnivorous dinosaur called Ceratosaurus, a genus of large carnivorous dinosaurs that lived in the late Jurassic period, discovered in the Morrison Formation in North America, and Lourinha system in Portugal. It has large jaws, blade-like teeth, and a large horn on its snout. Front limbs strong but quite short. According to records, this is also one of the dinosaur genera with the most number of subspecies found and divided ever. According to scientists, with its flexible body, Ceratosaurus horned dinosaur is always rated in the “top” of the most dangerous predators of the late Jurassic period.
Allosaurus skull fossils.
After comparing the bites to the tooth sizes of the carnivorous dinosaurs of the time, the researchers proved that the bite was left by the Allosaurus species. To the astonishment of paleontologists, Allosaurus teeth not only appeared on 684 fossils of plant-eating dinosaurs, but the bites of this species appeared on 83 fossils of one species. group of animal leg dinosaurs. And these fossils do not belong to any other species but Allosaurus. This has shocked the paleontological world because they did not think that Allosaurus was a cannibal.
Allosaurus was an extremely bloodthirsty dinosaur, they attacked any species even other carnivorous dinosaurs without a purpose.
Thomas R. Holtz, a paleontologist at the University of Maryland, specializing in carnivorous dinosaurs, said: “Although decades ago, there were signs that Allosaurus could be cannibalistic. But discovery at the Mygatt-Moore quarry has provided evidence and confirmed that Allosaurus is a cannibal.
It was not uncommon for predatory dinosaurs to attack each other in the prehistoric world, and many of today’s large predators such as saltwater crocodiles and short snout crocodiles also have cannibalism. Mark Loewen, paleontologist at the Utah Museum of Natural History in Salt Lake City, said: “Whether it is a Komodo dragon, a bear or a lion, today’s great predators are cannibalism from time to time.”
Stephanie Drumheller, a paleontologist at the University of Tennessee in Knoxville believes that these unusual fossil records are important evidence of Allosaurus’ cannibalism. Drumheller said: “Maybe there was a special event in the ecosystem at that time that caused these animals to run around looking for food and as the prey became scarce they would attack and eat. even my own kind “.
Although evidence from the Mygatt-Moore quarry proves that Allosaurus will eat his fellow flesh, through analysis and further investigation, paleontologists have discovered that this dinosaur did not actively attack. community kind to eat meat. Instead, traces from the fossil prove that the Allosaurus only ate the carcasses of their own kind after dying for some reason.