Dinosaurs · Large theropod

Aucasaurus

Say it aw-ka-sore-us. The name means ‘Auca lizard’.

Aucasaurus 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: 5 m
Diet: Meat-eater
When: Late Cretaceous84 to 71 million years ago
Fossils found in: Argentina
Named by: Coria, Chiappe and Dingus (2002)
Family tree: Dinosauria › Saurischia › Theropoda › Ceratosauria › Neoceratosauria › Abelisauroidea › Abelisauria

Where Aucasaurus 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

Lived at the same time

Gasparinisaura · same country
Noasaurus · same country
Antarctosaurus · same country
Dreadnoughtus · same country
Puertasaurus · same country
Kritosaurus · same country
Abelisaurus · same country
Neuquensaurus · same country

Other large theropods

Anserimimus Late Cretaceous
Dryptosaurus Late Cretaceous
Majungasaurus Late Cretaceous
Nanshiungosaurus Late Cretaceous
Gorgosaurus Late Cretaceous
Alectrosaurus Late Cretaceous
Albertosaurus Late Cretaceous
Daspletosaurus Late Cretaceous

Source: Aucasaurus 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.