Dinosaurs · Armoured dinosaur
Hesperosaurus
Say it hes-per-oh-sore-us. The name means ‘western lizard’.
- Length
- 6 m
- Diet
- Plant-eater
- When
- Late Jurassic154 to 142 million years ago
- Fossils found in
- USA
- Named by
- Carpenter, Miles and Cloward (2001)
- Family tree
- Dinosauria › Ornithischia › Thyreophora › Stegosauria › Stegosauridae › Stegosaurinae
Armoured dinosaurs. Plated and armoured plant-eaters, such as Stegosaurus and the ankylosaurs. See all 33
Lived at the same time
- Dryosaurus · same country
- Gargoyleosaurus · same country
- Haplocanthosaurus · same country
- Marshosaurus · same country
- Othnielia · same country
- Saurophaganax · same country
- Supersaurus · same country
- Barosaurus · same country
Other armoured dinosaurs
- Dacentrurus Late Jurassic
- Gargoyleosaurus Late Jurassic
- Kentrosaurus Late Jurassic
- Stegosaurus Late Jurassic
- Tuojiangosaurus Late Jurassic
- Hylaeosaurus Early Cretaceous
- Chungkingosaurus Late Jurassic
- Yingshanosaurus Late Jurassic
Source: Hesperosaurus 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.