Tyrannosaurus was not always the king of dinosaurs. Before they began to become predators, Tyrannosaurs began much less, and the newly discovered fossil helps to fill the gap between these two extremes. Tyrannosaurus was not always the king of dinosaurs. Before they became predators, Tyrannosaurs began much less, and newly discovered fossils help fill the gap between these two extremes.
The fossils of the dinosaurs were found in Utah where they lived 96 million years ago in a lush delta during chalk. The dinosaur lived at the end of the reign of allosaurs at the top of the food chain and before the tyrannosaurus came.
Now he is the oldest chrysanthemum of the chalk. found in North America
Medium-sized tyronnosal fossils were discovered in the Jurassic period some 150 million years ago. And then, about 81 million years ago during the chalk, Tyrannosaurs became giant predators and replaced allosaurs as the tip of the food chain.
So, what happened to them? Moros helps researchers to fill the 70 million-year gap, as well as portray a tyrannosaurus portrait in North America. Moros connects the earliest, smaller tyrannosaures with tyrannosaurus rex.
"With a lethal combination of bone biting powers, stereoscopic vision, rapid growth rates and colossal sizes, typed dinosaurs reigned without competition for 15 million years to the end. Sludge disappearance – but it has not always been, "says Lindsay Zano, lead author and paleontologist at North Carolina State University. "When and how fast the Tyrannosaurs went from King to Flower to King of Prom, they had long been worried by paleontologists. The only way to attack this problem is to get out of here and find out more about these rare animals. "
Zanno and her team spent a decade looking for fossils from the late chalk. They found teeth and hind legs, consisting of femur, shins, and legs belonging to Moros, in the same area where Zano found the fossil of a giant carnivorous carahondronzaur.
But Moros stood between 3 and 4 feet tall. The dinosaurs they discovered were 7 years old when they died, an almost adult adult who would weigh around 172 pounds. The elongated bones of legs and legs show that this will be a great runner. "Moros was light and extremely fast," Zanno said. These adaptations, along with advanced sensor capabilities, are the mark of a great predator. It was easy to catch a prey, while avoiding confrontation with the greatest predators of the day. "
This allowed Moros to survive as an environment, shifted, and altered. For 15 million years, Tyrannosaurs were limited to this smaller size before they became giants (about 12 feet tall and 11,000 to 15,500 pounds) over a period of 16 million years.
Although the earliest chrysanthemums were small, their predatory specialization meant that they were prepared to take advantage of new opportunities when warming temperatures, rising sea levels and collapsing areas restructure ecosystems at the beginning of the late- "Says Zano. "We now know it took them less than 15 million years to rise to power."
Morris is most closely associated with the Tyrannosaurus of Asia, which helped the researchers track the dinosaur line. This means that Moros crossed the Alaska land bridge during the early chalk to reach North America. Rex and his famous contemporaries like Triceratops can be among our most loved cultural icons, but we owe their existence to their fearless ancestors who have migrated here from Asia for at least 30 million years ago, "Zanno said. "Moros has signaled the creation of emblematic late-natured ecosystems in North America."