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Parasaurolophus (/ ˌ p ær ə s ɔː ˈ r ɒ l ə f ə s,-ˌ s ɔːr ə ˈ l oʊ f ə s /; meaning "beside crested lizard" in reference to Saurolophus) [2] is a genus of hadrosaurid "duck-billed" dinosaur that lived in what is now western North America and possibly Asia during the Late Cretaceous period, about 76.9–73.5 million years ago. [3]
Saurolophus (/ s ɔː ˈ r ɒ l ə f ə s /; meaning "lizard crest") is a genus of large hadrosaurid dinosaur from the Late Cretaceous period of Asia and North America, that lived in what is now the Horseshoe Canyon and Nemegt formations about 70 million to 66 million years ago. It is one of the few genera of dinosaurs known from multiple ...
Diagram showing crest anatomy in lambeosaurines Lambeosaurines have been traditionally split into the tribes or clades Parasaurolophini ( Parasaurolophus , Charonosaurus , others (?).) and Lambeosaurini ( Corythosaurus , Hypacrosaurus , Lambeosaurus , others.). [ 9 ]
The air is moved to the end of the crest at which point it is pushed back toward the skull. This air flow is represented by the arrows in the diagram. After the air exits the crest, it enter the lungs. When the Parasaurolophus exhales, the air moves back out of the lungs and back through the sinus cavity of the cranial crest.
The ornithopod family, which includes genera such as Edmontosaurus and Parasaurolophus, was a common group of herbivores during the Late Cretaceous Period. [1] Hadrosaurids are descendants of the Late Jurassic/Early Cretaceous iguanodontian dinosaurs and had a similar body layout. Hadrosaurs were among the most dominant herbivores during the ...
Parasaurolophus: 1922 Dinosaur Park Formation, Fruitland Formation, Kaiparowits Formation, Kirtland Formation (Late Cretaceous, Campanian) Canada ( Alberta) United States ( New Mexico Utah) Possessed a curved, hollow crest that varied in size between species Paraxenisaurus: 2020 Cerro del Pueblo Formation (Late Cretaceous, Campanian) Mexico
This feature helps to differentiate Parasaurolophini from Lambeosaurini. Generally, the crests of juveniles of lambeosaurines like Corythosaurus, Lambeosaurus, Hypacrosaurus stebingeri, parasaurolophines like Parasaurolophus, and primitive lambeosaurines like Kazaklambia are quite alike, although other features can be used to distinguish them. [39]
The first non-avian dinosaur found with direct evidence of feathers. Analysis of melanosomes suggests it had orange-brown and white countershading with a striped tail and a "bandit mask" around its eyes [133] Sinosaurus: 1940 Lufeng Formation (Early Jurassic, Hettangian to Sinemurian) China: Had a pair of midline crests similar to Dilophosaurus ...
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