blockbusters such as “Jurassic Park” have made them famous: in addition to giants such as Tyrannosaurus rex and Co, the so-called raptors in the films for voltage. This name is used in the popular culture for all representatives of the group of dromaeosaurids. It was a relatively small, two-legged running predators with sharp claws on the front and rear limbs. Unlike in the movies, the illustrated animals all raptors possessed dress, probably a Spring.

In the long age of the dinosaurs, the dromaeosaurids were a very successful group: they brought from the middle Jurassic to the upper Cretaceous, numerous species and were widely used on the world-wide, as the fossil record shows. It is assumed that they were with the early birds related. The newly discovered representatives illuminated the history of evolution of the dromaeosaurids, just before the asteroid impact that ended about 66 million years ago, the Era of the dinosaurs with a Bang.

A performer from the last act

The Fossil was discovered in the San Juan basin in New Mexico and consists of 20 bone fragments. The datings suggest that it dates from the time of period 67 million years ago. “It was a stroke of luck that we discovered the Remains of the Ombudsman’s weathering out of a small hill out,” says Steven Jasinski of the University of Pennsylvania in Philadelphia. He and his colleagues have set the fossil puzzle pieces together, and the shape of the animal and its characteristics are investigated.

As you report, it was a previously unknown representative of the dromaeosaurids, which was about a Meter high and two meters long. The scientists gave him the name of

Dineobellator notohesperus

. The animal had, therefore, the typical narrow snout, long claws, reinforced arms, a sickle-shaped claw on the foot and a long tail. The researchers even found instructions on the “personal destiny” of the investigated specimen. The dinosaur had apparently survived a fractured rib, such as a healed fracture occupied. But in the end, an injury to the anterior extremities, he was probably fatal, it is clear from Clues.

A top model of the Dino-Evolution

reports, such As the researchers, illustrates the Fossil again, that probably all dromaeosaurids were feathered: they discovered the Remains of the forearm bone of the animal small bumps. How do you explain, stuck in these structures, once springs. What Dineobellator distinguishes within his family, however, the limbs are the characteristics of its front and its tail, report paleontologists. Characteristics of the claws occupied Arm and hand structures of the animal suggest, therefore, that Dineobellator was able to move more flexible than other types. This ability could be useful for prey capture, especially effective. Dineobellator grabbed probably smaller animals like birds and lizards. He may have been overwhelmed but with his arms and clawed feet, other species of Dinosaurs, say the scientists.

As they continue to report, had also the tail of unusual properties. While most of the raptors were wearing him, rather in a straight line to the body, could Dineobellator angling his appendage apparently strong: the base of The Tail was unusually flexible, it is apparent from the analyses. As the researchers explain, it is for the good of the stabilization in the hunt for prey, fled in a zig-zag. “You have to call about the movements of the tail of a cat when hunting, before our eyes,” says Jasinski. “While the tail itself remains just around whipping it constantly, while the animal changes direction. A stiffer tail, which is at its base very portable, allows for increased mobility and changes of direction, and supported Dineobellator possibly in pursuit of prey, particularly in more open habitats“, says the paleontologist.

this means that Dineobellator was like a top model at the end of the history of evolution of the dromaeosaurids. “The discovery presents an interesting representative of a group of iconic meat-eating dinosaur that lived just before the extinction event that killed all the dinosaurs that were not birds,” says Jasinski. He and his colleagues now hope to further discoveries of Dineobellator or other dinosaurs, which allow more insight into the late Cretaceous fauna in the South of the present-day United States.

source: University of Pennsylvania, technical articles: Scientific Reports, doi: 10.1038/s41598-020-61480-7

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