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horned dinosaur
Chasmosaurus
Say it like this: “KAZ-moh-SOR-uhs”
Chasmosaurus belli
Chasmosaurus ate plants and walked on four legs. It lived in the Late Cretaceous. Bones have been found in Canada.
- When
- Late Cretaceous (Campanian) · roughly 83.6 to 72.2 million years ago
- Named in
- 1914 · Lambe, L. M.
- Hip height
- Not established
- Length
- 4.3–4.8 m · 14–16 ft
- Weight
- 1.5–2 tonnes
- Found in
- Canada · Dinosaur Park
- Food and walking
- Herbivore · Four legs
- Kind
- horned dinosaur · Ceratopsian
- Family branch
- Chasmosaurinae
The story in short
In 1914, L. M. Lambe published the name Chasmosaurus.
Fossils referred to Chasmosaurus date to the Late Cretaceous (Campanian), roughly 83.6 to 72.2 million years ago. Finds come from Canada, including the Dinosaur Park Formation. It was a herbivore and walked on four legs.
Published estimates put Chasmosaurus at a length near 4.3–4.8 m and a body mass around 1.5–2 tonnes.
On the family tree it sits in Chasmosaurinae, among the horned dinosaurs.
Close relatives
Agujaceratops
Agujaceratops mariscalensis
Late Cretaceous (Campanian) · roughly 83.6 to 72.2 million years ago
Anchiceratops
Anchiceratops ornatus
Late Cretaceous (Campanian · Maastrichtian) · roughly 83.6 to 66 million years ago
Arrhinoceratops
Arrhinoceratops brachyops
Late Cretaceous (Campanian · Maastrichtian) · roughly 83.6 to 66 million years ago