The fossil origin and body characteristics of Allosaurus

Allosaurus (also known as Allosaurus fragilis), which lived in the Late Jurassic, was the largest carnivorous dinosaur of that era. They were 12 meters long, 5 meters high, and some weighed more than 1.4 tons. It relied on two tall and strong legs to survive. It walks on its hind legs and has three clawed toes on its feet. This three-toed structure looks somewhat like a bird's feet. Allosaurus had a thick and long tail, but relatively short forearms. If there are two adults, one standing on the shoulders of the other, the person above can just see the teeth in the mouth of the Allosaurus, which is enough to witness the tallness of the Allosaurus.

There are large differences among Allosaurus individuals. Most known Allosaurus individuals are between 7 and 10 meters in length, but there are also some individuals up to 12 meters in length. Among them, Allosaurus was large and stout, and may have weighed 3 to 5 tons, more than twice the weight of ordinary Allosaurus. Allosaurus may have been larger, with some speculating that its length reached nearly 14 meters. Others believe that the cervical vertebrae of Giant Allosaurus are different from other Allosaurus, and classify it as a genus as "the largest lizard-eating king". Others believe that this individual fits the growth pattern of Allosaurus and should not be listed in its own genus. The classification of the largest Allosaurus remains to be further studied. In addition, some fossils found in Australia have also been classified as Allosaurus, and their age is about 45 million years later than their "similar" counterparts in North America. It is possible that a certain branch of Allosaurus reached the southern continent and continued into the Early Cretaceous.

Although the famous Tyrannosaurus is larger than Allosaurus, Allosaurus has stronger forelimbs that are thicker than Tyrannosaurus and more suitable for hunting herbivorous dinosaurs. Each hand has 3 A finger with sharp claws, these claws are 15.2 cm long. Therefore, some paleontologists believe that Allosaurus is the most powerful carnivorous dinosaur in the history of the earth.

The skeleton of Allosaurus, like other theropod dinosaurs, shows light, hollow features similar to those of birds. Allosaurus had a large head that was 91.4 centimeters long. Its skull was made up of several separate modules that could be embedded into each other so that it could easily swallow large pieces of meat. In addition, the most prominent feature of Allosaurus' head is the pair of horns that grow symmetrically between its eyes.

Allosaurus is a ferocious predator, and they often hunt in groups. With its huge mouth, powerful hind legs and strong tail, Allosaurus was able to sweep down any prey. But for Allosaurus, it is not always possible to catch fresh live animals, so they sometimes eat the carcasses of animals that have been killed by other carnivores and eaten leftover.

Chinese name: Allosaurus

Latin name: Allosaurus

Age of survival: Late Jurassic

Fossil origin: North America, Australia

Physical characteristics: 12 meters long

Diet: Carnivorous

Type: Theropod

Definition: Unusual lizard

animal tags： Allosaurus