Hadrosauridae
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Hadrosauridae, is a family of ornithischian dinosaurs informally referred to as duck-billed dinosaurs. This group is known as the duck-billed dinosaurs for the flat duck-bill appearance of the bones i
ROM 39 Maiasaura & Gryposaurus
Oxford Edmontosaurus
Hypacrosaurus Royal Tyrrell
FMNH Parasaurolophus fossil
Parasaurolophus
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Parasaurolophus 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 76.5–73 million years ago. I
Hadrosauridae
…dinosaurs for the flat duck-bill appearance of the bones in their snouts. The ornithopod family, which includes genera such as Edmontosaurus and Parasaurolophus, was a common group of herbivores during the Late Cretaceous Period. Hadrosaurids are descendants of the Late Jurassic/Early Cretaceous iguanodontian…
Holotype specimen of P. walkeri, showing the pathologic v-shaped notch
Skull diagram of juvenile P. cyrtocristatus
Closeup of P. walkeri beak and teeth