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The second toe, which was shorter and had fewer phalanges, also had more resistance and would make it easier to hold the claw off the ground and retain prey, a compromise with its predatory function and movement on the run, as occurs with modern seriemas, although to a lesser degree of specialization than dromaeosaurid dinosaurs. [23]
Apatosaurinae (the name deriving from the type genus Apatosaurus, meaning "deceptive lizard") is a subfamily of diplodocid sauropods, an extinct group of large, quadrupedal dinosaurs, the other subfamily in Diplodocidae being Diplodocinae. Apatosaurines are distinguished by their more robust, stocky builds and shorter necks proportionally to ...
The small reptile would have likely roamed the land of what is today southern Brazil, when the world was much hotter. The fossil has been identified as a new silesaurid, an extinct group of reptiles.
Nature can be absolutely beautiful. But it can also be scary as hell. Earthquakes, volcanoes, tsunamis, tornadoes, floods and fires cause mass destruction around the world.But Mother Nature is ...
Coelurosauria is a subgroup of theropod dinosaurs that includes compsognathids, tyrannosaurs, ornithomimosaurs, and maniraptorans; Maniraptora includes birds, the only known dinosaur group alive today. [6] Most feathered dinosaurs discovered so far have been coelurosaurs.
Deinocheirus (/ ˌ d aɪ n oʊ ˈ k aɪ r ə s / DY-no-KY-rəs) is a genus of large ornithomimosaur that lived during the Late Cretaceous around 70 million years ago. In 1965, a pair of large arms, shoulder girdles, and a few other bones of a new dinosaur were first discovered in the Nemegt Formation of Mongolia.
A curator at the Museo La Tormenta in Colombia discovered the leg bone in the Tatacoa Desert nearly two decades ago, but paleontologists were uncertain about what type of animal to which it belonged.
A related study also noted a locking mechanism in the lower jaw shared between the two genera. [43] In a separate paper, Currie noted the possibility that Alioramus might represent a juvenile Tarbosaurus , but stated that the much higher tooth count and more prominent nasal crests in Alioramus suggest it is a distinct genus.