Patagosaurus

Say it pat-ag-oh-sore-us. The name means ‘Patagonian lizard’.

Patagosaurus 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 Jurassic164 to 159 million years ago
Fossils found in: Argentina
Named by: Bonaparte (1979)
Family tree: Dinosauria › Saurischia › Sauropodomorpha › Sauropoda › Eusauropoda › Cetiosauridae

Where Patagosaurus 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

Lived at the same time

Other sauropods

Chinshakiangosaurus Late Jurassic
Lapparentosaurus Mid Jurassic
Omeisaurus Mid Jurassic
Cetiosaurus Mid Jurassic
Datousaurus Mid Jurassic
Shunosaurus Mid Jurassic
Barosaurus Late Jurassic
Mamenchisaurus Late Jurassic

Source: Patagosaurus 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.