Depicting a theropod dinosaur donusor donus
Masato Hattori
The largest is the largest preserved claw in a new species of dinosaurs found at the Mongolian building site. Bupid, the vegetarian animal had only two fingers on each hand, which can be used to understand branches and pull them towards their mouths.
90 million-year-old fossil-in which parts of the pelvis were included, both weapons and hands, and many vertebral-2012 were found near Khanbogad in the Gobi Desert, but it is now only studied and given scientific names. Donicus tsogtabariThe name Genus means “two claws” and the name of the species honors the Mongolian peliytologist Khishigajav Tsogtabatar,
Donichus Is a small relative of TherizinosorusWhich are the features in the film Jurassic World Dominion, Yoshitsugu Kobayashi At the University of Hokkaido, Japan and his colleagues estimate that the dinosaurs were about 3 meters long and weighing about 270 kg.
“Search of” Donicus tsogtabari A big thing is because it is the first known Therizinosor with only two fingers, “Cobayashi is called.” Most theropods, including other therizinosaurrs, placed three functional fingers, so finding one that lost one digit is very unpredictable. ,
Overall, five groups of theropods developed for only two fingers, being the most famous Tyrannosaurus.
DonichusThe claws are about 30 centimeters long. Unusually, claw sheaths – made of keratin, are the same materials similar to our nails – preserved.
“Keratin usually does not do fossils. It decreases long before the bones do,” is called Kobayashi. “Most of the time, when we find dinosaur claws, we are only looking at the Bonnie Core. But in life, the real claws will be covered in a thick keratin sheath, which makes it long and more curved.”
Team members Darla zelenitski At the University of Calgary in Canada, it is said that it was extremely surprising to find a two-fingering therizinosaur: “We were like, wow, it is actually bizarre to one of these dinosaurs.”
The claws of the claws tsogtbaatari
Kobayashi et al
She says, “This has been found to be the largest fully protected 3D dinosaur claw,” she says. “This claw is not preserved as a framework on the rock around the bone, which is very specific for fossils, which are the true claws preserved. This claw is really three dimensional and makes a sheath around the built -in finger bone, which we see in the claws of dogs and cats.”
Researchers feel that the claws were an adaptation to grab and pull the vegetation. With low fingers, every one can be strong and more flexible, allows for a tight, more controlled grip, called cobayashi.
“Curved claws and extreme flexibility suggests that it can hook more easily on branches or groups of leaves,” they say. “Three fingers can simply be found on the way, while two provided more accurate and efficient understanding.”
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