Hadrosaurus (/ ˌhædrəˈsɔːrəs /; 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.

Hadrosaurids (from Ancient Greek ἁδρός (hadrós) 'stout, thick' and σαύρα (saúra) 'lizard'), or hadrosaurs, are members of the ornithischian family Hadrosauridae. This group is known as the duck-billed dinosaurs for the flat duck-bill appearance of the bones in their snouts.

There are two subfamilies of hadrosaurs, the Lambeosaurinae, which have a crest on the skull (like the top skull at right), and the Hadrosaurinae, which lacked the crest (like the bottom skull at right).

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.

2023年9月6日 · Earth sciences curator Pat Druckenmiller led a study that found Hadrosaur fossils in the Prince Creek Formation in Alaska, a unit of rock deposited on the Arctic floodplain about …

2022年3月28日 · The Hadrosaurs were the members of the group Hadrosaurid that walked the planet during the Cretaceous Period (145 to 66 million years ago), with the type species being the Hadrosaurus foulkii.

Hadrosaurs (meaning "bulky lizards ") were the family of duck-billed herbivorous dinosaurs. They were the most common dinosaurs in the long Upper Cretaceous. Hadrosaurs ranged in size from 10 to 65 ft (3 to 20 m) long. [1] . They had horny, toothless beaks and hundreds of cheek teeth in the sides of their jaws.

Hadrosaurus was a large, two-legged herbivore from the hadrosaur group of dinosaurs. It would have cropped vegetation with its beak. It was called Hadrosaurus, which means 'bulky lizard', because it was so large and so heavy. It was the first hadrosaur ever named.

2024年2月11日 · Hadrosaurs are known as duck-billed dinosaurs because of the flat duck-bill appearance of the bones in their snouts. The family was erected by paleontologist Edward Drinker Cope in 1869...

…of the ornithopod lineage, the hadrosaurs (duck-billed dinosaurs of the Late Cretaceous) featured large dental batteries in both the upper and lower jaws, which consisted of many tightly compressed teeth that formed a long crushing or grinding surface. The preferred food of the duckbills cannot be certified, but at least…