Antarctosaurus

Say it Ant-ARK-toe-sore-us. The name means ‘non-northern lizard’.

Antarctosaurus 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: Late Cretaceous84 to 78 million years ago
Fossils found in: Argentina
Named by: von Huene (1929)
Family tree: Dinosauria › Saurischia › Sauropodomorpha › Sauropoda › Macronaria › Titanosauriformes › Titanosauria › Lithostrotia

Where Antarctosaurus 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

Aucasaurus · same country
Gasparinisaura · same country
Noasaurus · same country
Kritosaurus · same country
Alectrosaurus
Anserimimus
Archaeornithomimus
Bactrosaurus

Other sauropods

Quaesitosaurus Late Cretaceous
Maxakalisaurus Late Cretaceous
Sonidosaurus Late Cretaceous
Argentinosaurus Late Cretaceous
Dreadnoughtus Late Cretaceous
Puertasaurus Late Cretaceous
Nemegtosaurus Late Cretaceous
Opisthocoelicaudia Late Cretaceous

Source: Antarctosaurus 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.