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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 informally named dinosaurs is a listing of dinosaurs (excluding Aves; birds and their extinct relatives) that have never been given formally published scientific names. This list only includes names that were not properly published (" unavailable names ") and have not since been published under a valid name (see list of dinosaur ...
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").
Dinosaur classification began in 1842 when Sir Richard Owen placed Iguanodon, Megalosaurus, and Hylaeosaurus in "a distinct tribe or suborder of Saurian Reptiles, for which I would propose the name of Dinosauria." [1] In 1887 and 1888 Harry Seeley divided dinosaurs into the two orders Saurischia and Ornithischia, based on their hip structure. [2]
Jaxartosaurus (meaning "Jaxartes lizard" after the early name of the Syr Darya) is a genus of hadrosaurid dinosaur similar to Corythosaurus which lived during the Late Cretaceous. Its fossils were found in Kazakhstan. [1]
The largest dinosaur known from Australia, comparable in size to large South American dinosaurs. Potentially a synonym of the contemporary Diamantinasaurus [2] Australovenator: 2009 Winton Formation (Late Cretaceous, Cenomanian) Australia: Analysis of its arms suggests it was well-adapted to grasping [3] Austrosaurus: 1933
Jintasaurus (Chinese: 金塔龙; pinyin: Jīntǎ lóng; meaning "Jinta County dragon") is a genus of hadrosauriform dinosaur described by Hai-Lu You (尤海鲁, Yóu Hǎilǔ) and Da-Qing Li (李大庆, Lǐ Dàqìng) in 2009. The type species is J. meniscus. Jintasaurus lived during the Early Cretaceous of what is now Gansu, northwestern China.
N. sachalinensis was named and described in 1936 by Professor Takumi Nagao of the Imperial University of Hokkaido. The generic name refers to Nippon, the Japanese name of Japan; it was the first dinosaur named based on a find made on Japanese territory – though South Sakhalin was annexed by the Soviet Union in 1945.