Argentinosaurus

Say it AR-gent-eeno-sore-us. The name means ‘Argentina lizard’.

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

Length: 35 m
Weight: 70 tonnes
Diet: Plant-eatertough plant material
Walked: On four legs
When: Late Cretaceousabout 90 million years ago
Fossils found in: Argentina
Named by: Bonaparte and Coria (1993)
Family tree: Dinosauria › Saurischia › Sauropodomorpha › Sauropoda › Macronaria › Titanosauriformes › Titanosauria

Where Argentinosaurus 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

Sonidosaurus Late Cretaceous
Quaesitosaurus Late Cretaceous
Antarctosaurus Late Cretaceous
Aegyptosaurus Late Cretaceous
Paralititan Late Cretaceous
Maxakalisaurus Late Cretaceous
Patagotitan Early Cretaceous
Dreadnoughtus Late Cretaceous

Source: Argentinosaurus 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.