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- Dinosaur - Wikipedia
Dinosaurs are a diverse group of reptiles [note 1] of the clade Dinosauria They first appeared during the Triassic period, between 243 and 233 23 million years ago (mya), although the exact origin and timing of the evolution of dinosaurs is a subject of active research
- Dinosaur | Definition, Types, History, Names, Facts | Britannica
dinosaur, (clade Dinosauria), the common name given to a group of reptiles, often very large, that first appeared roughly 245 million years ago (near the beginning of the Middle Triassic Epoch) and thrived worldwide for nearly 180 million years
- Major Groups of Dinosaurs - U. S. National Park Service
We have a general picture of the closest relatives to dinosaurs The closest major group to dinosaurs appears to be the flying pterosaurs In a wider sense, dinosaurs belong to a group called Archosauria Archosaurs, the “ruling reptiles”, are today represented by crocodilians and birds
- The Dinosauria - University of California Museum of Paleontology
The term "Dinosauria" was invented by Sir Richard Owen in 1842 to describe these "fearfully great reptiles," specifically Megalosaurus, Iguanodon, and Hylaeosaurus, the only three dinosaurs known at the time
- Dinosauria: How the ‘terrible lizards’ got their name
You’ll often find ‘Dinosauria’, which is rooted in Greek, quoted as meaning ‘terrible lizard’ But in coining the term in his report, Owen refers to dinosaurs instead as ‘fearfully great’, acknowledging their large size – significantly surpassing that of any living reptile
- DINOSAURIA Definition Meaning - Merriam-Webster
The meaning of DINOSAURIA is a group of extinct archosaurian reptiles widely distributed from the Triassic to the Cretaceous that had hind limbs extending directly beneath the body and comprised of chiefly terrestrial, bipedal or quadrupedal ornithischians (such as ankylosaurs and stegosaurs) and saurischians (such as sauropods and theropods
- Dinosaur - New World Encyclopedia
Dinosaurs are an extinct, diverse, largely terrestrial group of vertebrate animals of the Sauropsid orders Saurischia (lizard-hipped) and Ornithischia (bird-hipped) and were the dominant land reptiles for over 160 million years, during the Mesozoic era
- The Dinosauria - Wikipedia
The Dinosauria is an encyclopedia on dinosaurs, edited by paleontologists David B Weishampel, Peter Dodson, and Halszka Osmólska It has been published in two editions by the University of California Press, with the first edition in 1990 and the second edition in 2004
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