Hadrosaurids or duck-billed dinosaurs are members of the family Hadrosauridae, and include ornithopods such as Edmontosaurus and Parasaurolophus. They were common herbivores in the Upper Cretaceous Period of what are now Asia, Europe and North America. They are descendants of the Upper Jurassic/Lower Cretaceous iguanodontian dinosaurs and had similar body layout. They were ornithischians.

Hadrosaurids are divided into two principal subfamilies. The lambeosaurines (Lambeosaurinae) had hollow cranial crests or tubes, and were generally less bulky. The saurolophines, identified as hadrosaurines in most pre-2010 works (Saurolophinae or Hadrosaurinae), lacked hollow cranial crests (solid crests were present in some forms) and were generally larger.

Read more about Hadrosaurid:  Characteristics, Cranial Differences Between Subfamilies, Discoveries, Classification, Ichnology

Other articles related to "hadrosaurid, hadrosaurids":

Lambeosaurus - Paleobiology - Cranial Crest
... The large size of hadrosaurid eye sockets and the presence of sclerotic rings in the eyes imply acute vision and diurnal habits, evidence that sight was important to ... The hadrosaurid sense of hearing also appears to be strong ... with a large space for an eardrum implies a sensitive middle ear, and the hadrosaurid lagena is elongate like a crocodilian's ...
... in Manchu, a reference to the Amur/Heilongjiang River) is a genus of lambeosaurine hadrosaurid dinosaur (crested duckbilled dinosaur) from the Late Cretaceous of ... Yuliangze Formation, alongside rarer remains of the hadrosaurine hadrosaurid (flat-headed duckbill) Wulagasaurus ... It is one of several hadrosaurids from the Amur River region named since 2000 ...
Judith River Formation - Fauna - Ornithischian Dinosaurs
... canadensis A hadrosaurid Ceratops C ... dentary with teeth," type specimen A dubious hadrosaurid D ... tutus ?"Kritosaurus" ?"K." breviceps A hadrosaurid ?L ...
Claorhynchus - History
... It was soon thought to be a hadrosaurid, though ... Wright regarded the genus as a dubious type of hadrosaurid, based on premaxillae and a predentary ... Additionally, other major reviews have left the genus as an indeterminate hadrosaurid ...