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Hadrosaurids
Fossil range: Late Cretaceous
Telmatosaurus sketch v2
Telmatosaurus, a basal hadrosaurid dinosaur.
Scientific classification

Class

Sauropsida

Superorder

Dinosauria

Order

Ornithischia

Suborder

Cerapoda

Infraorder

Ornithopoda

Superfamily

Hadrosauroidea

Family

Hadrosauridae
Cope, 1869

Subfamilies

  • Hadrosaurinae
    Cope, 1869
  • Lambeosaurinae
    Parks, 1923

Synonyms

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 subfamilies. The lambeosaurines (Lambeosaurinae) have large cranial crests or tubes, and are less bulky. The hadrosaurines (Hadrosaurinae) lack the cranial crests or tubes and are larger.

Mantell's Iguanodon restoration

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