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Map of various hadrosaur taxa across North America. Hadrosaurids likely originated in North America, before shortly dispersing into Asia. During the late Campanian-Maastrichtian, a saurolophine hadrosaurid migrated into South America from North America, giving rise to the clade Austrokritosauria, which is closely related to the tribe ...
Hadrosaurus (/ ˌ h æ d r ə ˈ s ɔːr ə s /; lit. ' bulky lizard ') is a genus of hadrosaurid ornithopod dinosaurs that lived in North America during the Late Cretaceous Period in what is now the Woodbury Formation in New Jersey about 83.6 to 77.9 Ma.
Fossils of Tawa-like dinosaurs have also been found in South America, which has important indications about paleogeography. During the Early Jurassic Period, dinosaurs such as Dilophosaurus, Anchisaurus, Coelophysis (formerly known as Megapnosaurus), and the early thyreophoran Scutellosaurus lived in North America.
Hadrosauroidea is a clade or superfamily of ornithischian dinosaurs that includes the "duck-billed" dinosaurs, or Hadrosauridae, and all dinosaurs more closely related to them than to Iguanodon. Their remains have been recovered in Asia, Europe, Africa and the Americas.
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.
Brachylophosaurus (/ b r ə ˌ k ɪ l ə f ə ˈ s ɔːr ə s / brə-KIL-ə-fə-SOR-əs or / ˌ b r æ k i ˌ l oʊ f ə ˈ s ɔː r ə s / brak-i-LOH-fə-SOR-əs) is a genus of hadrosaurid dinosaur that lived during the Late Cretaceous period of western North America.
Edmontosaurus regalis is a species of comb-crested hadrosaurid dinosaur. Fossils of E. regalis have been found in rocks of western North America that date from the late Campanian age of the Cretaceous Period 73 million years ago, but it may have possibly lived into the early Maastrichtian.
Kritosaurus is an incompletely known genus of hadrosaurid (duck-billed) dinosaur.It lived about 74.5-66 million years ago, in the Late Cretaceous of North America.The name means "separated lizard" (referring to the arrangement of the cheek bones in an incomplete type skull), but is often mistranslated as "noble lizard" in reference to the presumed "Roman nose" [1] (in the original specimen ...