Albertaceratops
Albertaceratops was a horned dinosaur that lived in what is now Canada and the USA, about 77.5 million years ago. It had long brow horns and a big frill with two hook-like spikes. It walked on four legs and ate plants.1
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Fun facts
Albertaceratops is unusual because it had long brow horns, but most other centrosaurine horned dinosaurs had short ones.1
Its frill had two large, outward-projecting hooks, which might have been for display or defense.1
It lived about 77.5 million years ago, during the Late Cretaceous period.1
The only known skull was found in August 2001, and it was almost complete.1
Scientists once thought some bones from Montana belonged to Albertaceratops, but later found they were from a different dinosaur called Medusaceratops.1
The species name, nesmoi, honors a rancher named Cecil Nesmo who helped fossil hunters.1

Most asked questions about Albertaceratops
?How big was Albertaceratops?
About 5.8 metres (19 ft) long and weighed around 3,500 kilograms (7,700 lb).1
?What did Albertaceratops eat?
It ate plants. It was an herbivore.1
?When did Albertaceratops live?
It lived about 77.5 million years ago, during the Late Cretaceous period.1
?Where was Albertaceratops found?
Its skull was found in Alberta, Canada, and some bones were later found in Montana, USA.1
?Why did Albertaceratops have long brow horns?
Scientists are not sure, but they might have been used for display or fighting. It is unusual because most similar dinosaurs had short brow horns.1
?Is Albertaceratops a dinosaur?
Yes, it is a type of horned dinosaur called a ceratopsian.1

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Myth buster
Myth: Some people think Albertaceratops was a meat-eater because it had horns and a beak.
Truth: Actually, it was a plant-eater, as shown by its teeth and jaw shape.3
For dino experts
- Scientific name
- Albertaceratops
- Named by
- Ryan 20073
- Group
- Horned dinos
- Family / clade
- Ceratopsidae3
- Classification
- Ornithischia > Ceratopsia > Ceratopsidae3
- Age of the rocks
- 84 to 72 million years (Campanian)3
- Rock formations
- Oldman, Judith River3
- Countries
- Canada, USA3
- Fossil records
- 2 in the Paleobiology Database3
- Discovery
- It was named by Michael J. Ryan in 2007, based on a skull found in Alberta, Canada, in 2001.12
- Still debated
- Scientists still debate whether some bones from Montana belong to Albertaceratops or to a different dinosaur, Medusaceratops.1
Where the facts come from
- Albertaceratops (en.wikipedia.org)
- A new basal centrosaurine ceratopsid from the Oldman Formation, southeastern Alberta | Journal of Paleontology | Cambridge Core (cambridge.org)
- Albertaceratops in The Paleobiology Database (CC BY 4.0): age, places, rock formations, classification.
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