By Will Dunham
(Reuters) – The excavations that were discovered during the construction of a water pipeline in the Gobi desert from Mongolia revealed one of the most extent most exotic dinosaurs, a hand creature of their hands with two warships, a pair of wasted curved claws.
Researchers said that the dinosaurs, called Duonychus Tsogtbaaari, is about 10 feet (3 meters), and weighs about 575 lbs (260 kg) and lived nearly 90 to 95 million years during the Cretaceous period. Its claws are measured about (30 cm).
Duonychus was a medium -sized member in a group of embarrassing dinosaurs called Theizinosaurs, which was known for the presence of a periodic trunk, a long neck, a small head, a secondary position, feathers on the body and huge claws on the hands. While they were part of the dinosaurs called Theopods, which included all meat eaters like Tyrannosaurus and Spinosaurus, Theerizinosaors preferred plants in their list.
Theerizinosaurs, which inhabits Asia and North America, is characterized by its large claws. To date, each well -known thyrzenosor had three claw fingers. But Duonychus has less, making it appropriate that his name means “claws”.
“Theerizinosaurss are some of the strangest dinosaurs ever. They were theopods – so, they were associated with meat eating – but they seemed to be a giant lazy lash,” said the fossil scientist Yoshitogo Kobayashi of the Hokkaido University Museum in Japan, the author of the research published on Tuesday in Iscience magazine.
“Duonychus takes this strangeness further. This is the short hand, which extends fingers with claws like Raptor (fast -eating dinosaurs), but it used it to eat plants. It is like development,” Let’s try something completely new. “
The researchers said that this individual Duonychus did not grow completely. I wandered in an almost almost individual environment with a river channels alongside the other theizinosaurs, armored dinosaurs, packed dinosaurs, ducks filled with ducks, and men smaller than Tyrannosaurus called Alectrosaurus.
While the recovered skeleton was incomplete – for example, weapons and hands were well preserved.
One of the claws kept its outer cover – the keratin sheath, the same material as in our nails – instead of just the primary bone. The keratin sheath added more than 40 % to the length of the claw.
“These were large, severe and evil claws,” said Darla Zellingski of Calgary University in Canada.
“This is incredibly rare, and it gives us an extraordinary window on how to actually use these dinosaurs in life. The hands are beautifully preserved and many details are shown, including fascinated wrist bones, harsh joints and huge claws,” Kepiashi said about the keratin fossils.
The claws may have served multiple jobs, although they are used primarily to seize the branches and pull them to feed on the leaves.
“They could use claws for other purposes, perhaps for struggle, defense, digging, and perhaps even identifying the types of individual -” hey, look at me. I also have only two fingers. “
Duonychus is an example of reducing numbers – losing fingers or toes through development. The first ground vertebrates were eight numbers. The oldest dinosaurs had their hands with five fingers, just as people do, but many dynamics strains suffered from reducing numbers over time.
Duonychus’s discovery means that there is now no less than five strains of Theopods known to have evolved independently only two fingers in each hand. He was the most famous of those T
So why are the number of fingers useful?
“With the presence of dinosaurs that understood the vegetation while searching, one may think that more fingers would be better. This was not the case with Duonychus, as it seemed that building her hand with two fingers fits with it well. I think he might have had a specialized nutrition behavior or food source.”
“Tyrannosaurs was excessive monsters in huge skulls and cities designed to seize prey and murder,” Zellingski added. “For them, the fingers and weapons may have been reduced because they were somewhat useful compared to their outbreak.”
(Will Dunaham’s reports in Washington, edited by Rozlabba O’Brien) participated in the reports of Will Dun.
