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horned dinosaur
Einiosaurus
Say it like this: “ie-nee-o-SAWR-us”
Einiosaurus procurvicornis
Einiosaurus ate plants and walked on four legs. It lived in the Late Cretaceous. Bones have been found in the United States.
- When
- Late Cretaceous (Campanian) · roughly 83.6 to 72.2 million years ago
- Named in
- 1995 · Sampson, S. D.
- Hip height
- Not established
- Length
- 4.5 m · 15 ft
- Weight
- 1.3 tonnes
- Found in
- the United States · Two Medicine
- Food and walking
- Herbivore · Four legs
- Kind
- horned dinosaur · Ceratopsian
- Family branch
- Centrosaurinae
The story in short
The genus Einiosaurus dates to 1995, the year S. D. Sampson described it. The name means “bison lizard.”
It lived in the Late Cretaceous (Campanian), roughly 83.6 to 72.2 million years ago. Finds come from the United States, including the Two Medicine Formation. It was a herbivore and walked on four legs.
Published estimates put Einiosaurus at a length near 4.5 m and a body mass around 1.3 tonnes.
On the family tree it sits in Centrosaurinae, among the horned dinosaurs.
Close relatives
Achelousaurus
Achelousaurus horneri
Late Cretaceous (Campanian) · roughly 83.6 to 72.2 million years ago
Albertaceratops
Albertaceratops nesmoi
Late Cretaceous (Campanian) · roughly 83.6 to 72.2 million years ago
Avaceratops
Avaceratops lammersi
Late Cretaceous (Campanian) · roughly 83.6 to 72.2 million years ago