‘Most bizarre dinosaur ever found’ is missing evolutionary link – study
An unusual vegetarian dinosaur with the silhouette of a velociraptor to tear the meat, whose fossilized remains were discovered in southern Chile there 13 years ago, is a missing link in the evolution of dinosaurs, researchers said.
A revised diegosuarezi chilesaurus assessment, regarding kangaroo, reported in the journal Biology Letters, builds a theory revealed earlier this year, which threatens to change a ranking of all long dinosaurs.
Dinosaurs were the kings of the earth for 160 million years until a space rock had struck the planet there are 65,500 years and the erased people confined to the earth. Survivors, who are able to fly, direct ancestor of birds today.
“Chilesaurus really helps fill a gap in evolution between the two main groups of dinosaurs,” said co-author Paul Barrett, president of the Palaeographical Society of Great Britain and researcher at the Natural History Museum.
When first introduced to the world in 2015, chilesaurus – despite its penchant for plants – has been grouped with theropods, the suborder of carnivorous dinosaurs which includes not only velocitrapteurs float, but Tyrannosaurus rex, the final carnivore .
Experts acknowledged at the time, however, was an uncomfortable adjustment. One describes the beast as “the strangest dinosaur ever found.”
An, powerful vertical hind legs and limbs before short cuts remind all theropods.
However, an inverted hip structure, similar to a bird and flat teeth and leaf shape – proof of an exclusively vegetable diet – suggested that it also shares traits with another important suborder, Ornithology.
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The well-known ornitisquio include Triceratops and Stegosaurus three tons, which had large armored plates along its spine and a walnut brain size.
“Chilesaurus initially appeared as a previous theropod drift line, but it was suspected that all these adaptations seemed to eat plants,” Barrett said.
There lived about 150 thousand years, long before the handful of known theropods to rotate away from the flesh, he said.
To check chilesaurus place in the family dinosaur tree, Barrett and Matthew Baron University of Cambridge analyzed more than 450 anatomical features of the first dinosaurs.
“We realized that it was not a strange thropode and early-eating plants, but rather a strange animal to eat plants that was a branch of that other group of ornithischians,” Barrett said.
The new affiliate has important implications. For much of the last century, experts have agreed that theropods were more closely related to a third major evolutionary branch, sauropods, which includes long-necked animals such as the Diplodocus and Brachiosaurus.
But chilesaurus shows that the feared killers under the shared terópodo umbrella, in fact, a greater affinity with the collection of wild animals docile Ornitisquia.