Unusual forelimbs have evolved independently and tyrannosaurs
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A new species of dinosaur possessed short front paws, but are not relatives of tyrannosaurs, found a group of researchers led by Peter Makovická of the Field museum of natural history in Chicago. According to experts, it makes finding even more to think about, in what was an evolutionary expediency short forelimbs to ancient dinosaurs.
Photo: pixabay.com
The new species, which is representative of the experts found in Patagonia (South America), called Gualicho shinyae, in honor of the spirit of mythology gualichu Argentine tribes inhabiting on this terrain. These dinosaurs lived about 90 million years ago, long reach about 7.6 meters long and weighed about a ton, that is about as modern polar bears. This paw adults, apparently the size of human hands resembled a child passes bbc.com.
Although the legs Gualicho shinyae, as tyrannosaurs legs were short and had two fingers, two species not related They are, and experts say that similar structural features formed in two species independently. How to emphasize the experts, it again proves that the short front legs in the course of evolution have formed not semi-random, and are useful device (however, the question of what exactly is their advantage, still has no clear answer).
«Paws T-Rex” is not the only feature of the new species, attracted the attention of researchers. According to Peter Makovická found lizard in general not too similar to any of the ancient predators found at the same location, and it is difficult even to identify in any category. At the same time, according to scientists, the dinosaur is a kind of “mosaic” of features belonging to a variety of ancient predator.
Another interesting fact is that the unusual remains were found by experts, when their mission is almost over.
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