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Gorgosaurus (/ ˌ ɡ ɔːr ɡ ə ˈ s ɔːr ə s / GOR-gə-SOR-əs; lit. ' dreadful lizard ' ) is a genus of tyrannosaurid theropod dinosaur that lived in western North America during the Late Cretaceous Period ( Campanian ), between about 76.5 and 75 million years ago . [ 1 ]
A scientific publication by Phil Bell and colleagues in 2017 show that tyrannosaurids such as Gorgosaurus, Tarbosaurus, Albertosaurus, Daspletosaurus, and Tyrannosaurus had scales. The Bell et al. 2017 paper notes that the scale-like integument on bird feet were actually secondarily derived feathers according to paleontological and evolutionary ...
This list of non-avian theropod type specimens is a list of fossils that are the official standard-bearers for inclusion in the Mesozoic species and genera of the dinosaur clade Theropoda, which includes the carnivorous dinosaurs like Tyrannosaurus and Velociraptor, their herbivorous relatives like the therizinosaurs, and birds.
This list of nicknamed non-dinosaur fossils is a list of non-dinosaurian fossil specimens given informal names or nicknames, in addition to their institutional catalogue numbers. It excludes informal appellations that are purely descriptive (e.g., "the Fighting Dinosaurs", "the Trachodon Mummy").
Sea Monsters: A Prehistoric Adventure (also called Sea Monsters) is a 2007 American IMAX 3D documentary film by National Geographic, about prehistoric marine reptiles.It alternates modern-day sequences about the work of scientists studying the animals with computer-animated scenes depicting the prehistoric past.
The supposed speed of Struthiomimus was, in fact, its main defense from predators (although it may also have been able to lash out with its hind claws when cornered), such as the dromaeosaurids (e.g. Saurornitholestes and Dromaeosaurus) and tyrannosaurs (e.g. Daspletosaurus and Gorgosaurus), which lived at the same time. It is estimated to have ...
Gorgosaurus libratus was formally reassigned to Albertosaurus (as Albertosaurus libratus) by Dale Russell in 1970, [4] with many subsequent authors following his lead. [19] [21] Combining the two greatly expands the geographical and chronological range of the genus Albertosaurus. Other experts maintain the two genera as separate. [5]
Mounted skeletons of Tyrannosaurus (left) and Apatosaurus (right) at the AMNH. Dinosaurs are a diverse group of reptiles of the clade Dinosauria. They first appeared during the Triassic period, between 243 and 233.23 million years ago, although the exact origin and timing of the evolution of dinosaurs is the subject of active research.