Dinosaurs · Ceratopsian

Einiosaurus

Say it ie-nee-oh-sore-us. The name means ‘bison lizard’.

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

Length: 6 m
Diet: Plant-eater
When: Late Cretaceousabout 74 million years ago
Fossils found in: USA
Named by: Sampson (1995)
Family tree: Dinosauria › Ornithischia › Ceratopsidae › Centrosaurinae

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

Ceratopsians. Horned and frilled plant-eaters, such as Triceratops. See all 29

Lived at the same time

Achelousaurus · same country
Bambiraptor · same country
Corythosaurus · same country
Dromaeosaurus · same country
Dryptosaurus · same country
Euoplocephalus · same country
Gorgosaurus · same country
Gryposaurus · same country

Other ceratopsians

Anchiceratops Late Cretaceous
Pachyrhinosaurus Late Cretaceous
Protoceratops Late Cretaceous
Arrhinoceratops Late Cretaceous
Centrosaurus Late Cretaceous
Chasmosaurus Late Cretaceous
Pentaceratops Late Cretaceous
Styracosaurus Late Cretaceous

Source: Einiosaurus 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.