Dinosaurs · Small theropod
Stenonychosaurus
Say it Sten-oh-NYE-ko-sore-us. The name means ‘narrow claw lizard’.
- Length
- 2.5 m
- Weight
- 35 kg
- Diet
- Ate plants and animals
- Walked
- On 2 legs
- When
- Late Cretaceous77 to 74 million years ago
- Fossils found in
- Canada
- Named by
- Sternberg (1932)
- Family tree
- Dinosauria › Saurischia › Theropoda › Troodontidae
Small theropods. Small two-legged dinosaurs, many feathered, the group that includes birds. See all 60
Lived at the same time
- Chirostenotes · same country
- Gorgosaurus · same country
- Gryposaurus · same country
- Parasaurolophus · same country
- Albertaceratops · same country
- Albertosaurus · same country
- Centrosaurus · same country
- Chasmosaurus · same country
Other small theropods
- Dromaeosaurus Late Cretaceous
- Struthiomimus Late Cretaceous
- Chirostenotes Late Cretaceous
- Shuvuuia Late Cretaceous
- Troodon Late Cretaceous
- Avimimus Late Cretaceous
- Velociraptor Late Cretaceous
- Citipati Late Cretaceous
Source: Stenonychosaurus 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.