Dinosaurs · Large ornithopod

Lophorhothon

Say it lof-oh-roh-thon. The name means ‘crested nose’.

Lophorhothon 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: 4.5 m
Diet: Plant-eater
When: Late Cretaceous84 to 71 million years ago
Fossils found in: USA
Named by: Xu, Makovicky, Wang, Norell and You (1960)
Family tree: Dinosauria › Ornithischia › Ornithopoda › Hadrosauridae › Euhadrosauria › Hadrosaurinae

Where Lophorhothon 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

Bambiraptor · same country
Dryptosaurus · same country
Gryposaurus · same country
Achelousaurus · same country
Gorgosaurus · same country
Albertaceratops · same country
Avaceratops · same country
Euoplocephalus · same country

Other large ornithopods

Bactrosaurus Late Cretaceous
Telmatosaurus Late Cretaceous
Tsintaosaurus Late Cretaceous
Gryposaurus Late Cretaceous
Maiasaura Late Cretaceous
Brachylophosaurus Late Cretaceous
Nipponosaurus Late Cretaceous
Tanius Late Cretaceous

Source: Lophorhothon 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.