At equivalent relative speeds, a small theropod
will be moving in a decidedly different fashion to a large theropod
," according to the study.
Aaryan Kumar of Delhi University said it was impossible for a dinosaur skeleton to be so well preserved but added: "It does resemble theropods
in comparative biology from AMNH's Graduate School and also is an instructor at Stony Brook, has worked on examining how brain shape changes through the evolution of flight in theropods
, a group of carnivorous dinosaurs closely related to birds.
Until now, the only non-carnivorous theropods
known were late arrivals during the reign of the dinosaurs and closely related to birds.
Chilesaurus diegosuarezi had a bird-like beak with leaf-shaped teeth, evidence that it feasted on plants, but with hind leg features similar to theropod
dinosaurs, the group into which it was slotted with notorious killers like T.
Using tools normally employed to study the evolution of viruses, the team looked at 1,500 body traits across 120 species of theropod
and early birds.
Study co-author Yoshitsugu Kobayashi, a vertebrate paleontologist at Hokkaido University in Japan, said that not only is the new find the largest colony of nonavian theropods
, but also is the best documented site.
This is despite a 5000-fold difference in mass between Tyrannosaurus rex and the smallest feathered theropods
Thomas Henry Huxley, one of Darwin's strongest advocates, proposed a close relationship between birds and small, meat-eating dinosaurs, or theropods
gave rise to modern birds and included famous names such as Tyrannosaurus rex and Velociraptor.
Huxley, 1868), and subsequently proposed that birds were the extant descendants of theropods
Unlike some theropods
that have small arms - like T Rex - Banjo was different.
Until now, however, dino feathers had been found only in theropods
and their relatives, the saurichian dinosaurs.
After completing research this month, experts concluded that the fossils were from several different types of dinosaurs, including sauropods and theropods
, which last lived in the area over 150 million years ago.
The 100mn year old plumage has features of both feather-like fibres found with some two-legged dinosaurs known as theropods
and of modern bird feathers, the researchers said.