Dinosaurs · Large theropod

Baryonyx

Say it bah-ree-ON-icks. The name means ‘heavy claw’.

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

Length: 10 m
Weight: 2 tonnes
Diet: Meat-eaterfish, Iguanodon
Walked: On 2 legs
When: Early Cretaceousabout 125 million years ago
Fossils found in: England, Spain
Named by: Charig and Milner (1987)
Family tree: Dinosauria › Saurischia › Theropoda › Spinosauridae › Baryonychinae

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

Large theropods. Big two-legged meat-eaters, such as Tyrannosaurus. See all 63

Found in Britain. Fossils of Baryonyx have been found in the United Kingdom. Read about how Britain moved across the globe in Britain's journey.

Lived at the same time

Aragosaurus · same country
Concavenator · same country
Eotyrannus · same country
Hypsilophodon · same country
Iguanodon · same country
Neovenator · same country
Pelecanimimus · same country
Pelorosaurus · same country

Other large theropods

Yutyrannus Early Cretaceous
Eotyrannus Early Cretaceous
Neovenator Early Cretaceous
Fukuiraptor Early Cretaceous
Suchomimus Early Cretaceous
Concavenator Early Cretaceous
Afrovenator Early Cretaceous
Acrocanthosaurus Early Cretaceous

Source: Baryonyx 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.