Dinosaurs · Large ornithopod

Corythosaurus

Say it koh-rith-OH-sore-us. The name means ‘Corinthian helmet lizard’.

Corythosaurus beside a person 1.75 m tall. Ticks mark every metre.Body shape drawn for this site, showing the general build of large ornithopods

Length: 10 m
Diet: Plant-eater
When: Late Cretaceous76 to 74 million years ago
Fossils found in: Canada, USA
Named by: Brown (1914)
Family tree: Dinosauria › Ornithischia › Ornithopoda › Hadrosauridae › Lambeosaurinae

Where Corythosaurus sits in the age of dinosaurs.Periods from the ICS chart; dinosaur dates from the Natural History Museum

Large ornithopods. Big plant-eaters that walked on two or four legs, including the duck-billed dinosaurs. See all 36

Lived at the same time

Achelousaurus · same country
Albertosaurus · same country
Bambiraptor · same country
Centrosaurus · same country
Chasmosaurus · same country
Chirostenotes · same country
Daspletosaurus · same country
Dromaeosaurus · same country

Other large ornithopods

Edmontosaurus Late Cretaceous
Gilmoreosaurus Late Cretaceous
Lambeosaurus Late Cretaceous
Rhabdodon Late Cretaceous
Parasaurolophus Late Cretaceous
Prosaurolophus Late Cretaceous
Hadrosaurus Late Cretaceous
Kritosaurus Late Cretaceous

Source: Corythosaurus in the Natural History Museum Dino Directory, read 12 November 2026. Sizes are the museum's estimates for a typical adult. "Lived at the same time" lists dinosaurs whose dates overlap, which does not always mean they met.