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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.
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").
This list of pterosaurs is a comprehensive listing of all genera that have ever been included in the order Pterosauria, excluding purely vernacular terms.The list includes all commonly accepted genera, but also genera that are now considered invalid, doubtful (nomen dubium), or were not formally published (nomen nudum), as well as junior synonyms of more established names, and genera that are ...
Name Year Formation Location Notes Images Abydosaurus: 2010 Cedar Mountain Formation (Early Cretaceous, Albian) United States ( Utah) Had a short domed crest on its skull similar to that of Giraffatitan: Acantholipan: 2018 Pen Formation (Late Cretaceous, Santonian) Mexico ( Coahuila) Known to possess spike-like osteoderms Achelousaurus: 1994
The genus must appear on the List of dinosaur genera. At least one named species of the creature must have been found in South America. This list is a complement to Category:Mesozoic dinosaurs of South America.
Scientific name: The binomial name of the species, accompanied by a citation to the work in which the species was formally named. Status: The taxonomic status of the species, listing whether the species is currently regarded as valid, a nomen dubium, or as synonymous with another species. Authors: The list of people credited with naming the ...
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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).