Cetiosaurus

Say it See-TEE-oh-sore-us. The name means ‘whale lizard’.

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

Length: 18 m
Diet: Plant-eater
When: Mid Jurassic170 to 160 million years ago
Fossils found in: England
Named by: Phillips (1871)
Family tree: Dinosauria › Saurischia › Sauropodomorpha › Sauropoda › Eusauropoda › Cetiosauridae

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

Sauropods. Long-necked, four-legged plant-eaters, the biggest animals ever to walk on land. See all 59

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

Lived at the same time

Other sauropods

Datousaurus Mid Jurassic
Shunosaurus Mid Jurassic
Lapparentosaurus Mid Jurassic
Omeisaurus Mid Jurassic
Cetiosauriscus Mid Jurassic
Patagosaurus Mid Jurassic
Amygdalodon Mid Jurassic
Rhoetosaurus Mid Jurassic

Source: Cetiosaurus 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.