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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.
The only titanosaur confirmed to have crossed into North America. One of the largest dinosaurs known from the continent [6] Alaskacephale: 2006 Prince Creek Formation (Late Cretaceous, Campanian) United States ( Alaska) Had an array of polygonal nodes on its squamosal: Albertaceratops: 2007 Oldman Formation (Late Cretaceous, Campanian) Canada ...
Approved images: Images that have been approved by the Wikipedia:WikiProject Dinosaurs team can now be found at Category:Approved dinosaur images. Images that have been deemed inaccurate should be placed in the Wikimedia Commons category "Inaccurate dinosaur restorations" c:Category:Inaccurate dinosaur restorations , so they can be easily ...
This category lists dinosaur images that have been reviewed and approved at Wikipedia:WikiProject Dinosaurs/Image review either for their scientific accuracy or for their historical value. Subcategories
Step back in time to the Mesozoic Era, where dinosaurs ruled the Earth. With this quiz, you’ll encounter iconic giants like the T. Rex and the Stegosaurus, clever predators like the Velociraptor ...
tr This is a list of stratigraphic units from which dinosaur body fossils have been recovered. Although Dinosauria is a clade which includes modern birds, this article covers only Mesozoic stratigraphic units. Units listed are all either formation rank or higher (e.g. group).
This list of nicknamed dinosaur fossils is a list of fossil non-avian dinosaur 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").
As of 2017, there is only one find of a possible Tyrannosaurus rex footprint, dating from 2007 and described a year later. [34] A trackway made by mid-sized theropod, possibly a small tyrannosaurid individual, was discovered in South Dakota in 1997, and in 2014 these footprints were named Wakinyantanka styxi .