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- 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
- 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
- What Makes a Dinosaur a Dinosaur - U. S. National Park Service
A more handy general definition would go something like this: Dinosaurs are extinct animals with upright limbs that lived on land during the Mesozoic Era (252 to 66 million years ago) This would basically capture how paleontologists long thought about dinosaurs
- 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
: 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) which included the ancestor o
- 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
- Dinosaur Facts - American Museum of Natural History
Discover why the Tyrannosaurus had sharp teeth, where the name “dinosaur” comes from, and more! Dinosaurs are a group of reptiles that have lived on Earth for about 245 million years In 1842, the English naturalist Sir Richard Owen coined the term Dinosauria, derived from the Greek deinos, meaning “fearfully great,” and sauros, meaning “lizard ”
- Dinosaur - Evolution, Classification, Extinction | Britannica
Dinosauria was the first and included the iguanodonts, the large carnivores (or megalosaurids), and the armoured forms (including Scelidosaurus) Compsognatha was the second order, named for the very small birdlike carnivore Compsognathus
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