My colleagues Chris Organ and Andrew Shedlock, who provided evidence that theropod dinosaurs already had (somewhat) reduced genome sizes prior to the evolution of birds (Organ et al. 2007) have ...
... parts of the brain. Zelenitsky and Therrien CT-scanned and measured the skulls of a wide variety of theropod dinosaurs, including raptors and ostrich-like dinosaurs, as well as the primitive bird ...
... discovered it was mistakenly identified. In putting all the data together, she realized they had a small theropod (meat-eating) dinosaur nest. "Nests of small theropods are rare in North America and ...
... where the male is the sole or primary nest attendant."
The researchers now had their link from the theropod dinosaurs (omnivores and carnivores that walked on two hind legs with bird-like feet) to ...
... -years-old rocks is a rich deposit of fossils, not only of an as-yet-unnamed carnivorous theropod, but also of a large, herbivorous "duck billed" hadrosaur, prehistoric crocodiles, turtles, sharks, ...
... — maybe even in the earliest dinosaurs. Scientists had previously identified feathers and so-called "dinofuzz" in theropods, two-legged meat-eaters that are widely considered the ancestors of birds.
... species of ornithomimosaur, or ostrich-mimic dinosaur. Ornithomimosaurs are a lineage of theropods that evolved a toothless beak and were likely omnivorous or herbivorous, superficially resembling ...
... birds as having descended from dinosaurs was similarities in their lungs," Ruben said. "However, theropod dinosaurs had a moving femur and therefore could not have had a lung that worked like that in ...
... that birds have lost one finger from the outside and one from the inside of the hand. Unlike all other theropods, the hand of Limusaurus strongly reduced the first finger and increased the size of ...
... The researchers are in no doubt – it was a large, predatory, carnivorous dinosaur (theropod) belonging to the Allosauroidea clade (one of the branches of the phylogenetic tree), a group that contains ...
Scientists have discovered three new species of Australian dinosaur discovered in a prehistoric billabong in Western Queensland: two giant, herbivorous sauropods and one carnivorous theropod.
... to the reptiles' diet. The fossil finds of juvenile dinosaurs that have been swallowed whole by theropods support the idea that dinosaurs might have profited from this as well. Missing fossils, ...
... even through cannibalism.
"Cannibalism has been tentatively suggested in other studies of theropod behaviour and this certainly could have been a route of transmission for the infection," said Wolff ...
... distinguish major groups, such as plant-eating ornithischians and meat-eating theropods."
When they analyzed the tracks, the researchers determined that ornithischians changed their way of walking ...
... is that of a three-toed, bipedal, meat-eating dinosaur, with the most likely candidate being the theropod named Acrocanthosaurus, found mostly in Texas, North Carolina and Oklahoma.
"The track is ...
