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Colepiocephale

Say it: ko-LEP-ee-oh-SEF-uh-lee
Name means: “knucklehead”1
Ate: PlantsDome-headsLate Cretaceous

Colepiocephale was a small dome-headed dinosaur that lived in what is now Canada. It had a thick, bony dome on its skull that looked like a knuckle, and it used its head for head-butting fights with other dinosaurs.1

Lived
84 to 72 million years ago3
Late Cretaceous
Fossils found in
Alberta, Canada, and Montana, USA1
Length
2 to 3 m (6.6 to 9.8 ft)1
estimated
Weight
32 kg (71 lb)2
largest known specimen
Top speed
about 42 km/h (26 mph)
Running, estimate
What did Colepiocephale eat?
It was an herbivore, meaning it ate plants.

When did it live?

Triassic
Jurassic
Cretaceous
252 million years ago20114566, the asteroid

How big was it?

How long was it?

Colepiocephale about 3 m long (9.8 ft)A bicycle about 1.8 m (5.9 ft)A car about 4.5 m (15 ft)An elephant, the biggest land animal today about 6.5 m (21 ft)

How heavy was it?

as heavy as 8 house cats
as long as 3 dogs nose to tailas long as 17 bananas end to endas heavy as 6 watermelonscould run 100 metres in 8.6 seconds (the fastest human needs 9.6)

How big was Colepiocephale compared to YOU?

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How fast was it?

cool stuff

Fun facts

1

Colepiocephale means 'knucklehead' because its dome looked like a curled-up knuckle.1

2

It was one of the oldest dome-headed dinosaurs in North America, living about 80 million years ago.1

3

The first fossil was a partial skull found in 1923 by E.J. Whitaker along the South Saskatchewan River.1

4

Scientists once thought it was a species of Stegoceras, but later gave it its own name in 2003.1

5

All the fossils found in the Foremost Formation belong to Colepiocephale, meaning it was the only dome-headed dinosaur there at that time.1

6

Its dome was made of solid bone, and it may have used it to ram rivals or show off to mates.1

AI-madeAI-made picture of Colepiocephale
An AI-made picture of how Colepiocephale might have looked, made by a computer from what scientists know. It is a guess: the real animal may have looked different, and nobody knows its true colours.
you asked

Most asked questions about Colepiocephale

?How big was Colepiocephale?

It was a small dinosaur. The Paleobiology Database estimates its adult length between 1 and 2 metres, but no exact size is known from the fossils.3

?What did Colepiocephale eat?

It was an herbivore, meaning it ate plants.3

?When did Colepiocephale live?

It lived during the Late Cretaceous period, about 80 to 78 million years ago.1

?Where was Colepiocephale found?

Its fossils were found in Alberta, Canada, mostly in the Foremost Formation. One specimen also came from Montana.1

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For dino experts

Scientific name
Colepiocephale
Named by
Sullivan 20033
Group
Dome-heads
Family / clade
Pachycephalosauridae3
Classification
Ornithischia > Pachycephalosauria3
Age of the rocks
84 to 72 million years (Campanian)3
Rock formations
Foremost3
Countries
Canada3
Fossil records
4 in the Paleobiology Database3
Discovery
The first fossil, a partial skull, was collected in 1923 by E.J. Whitaker in Alberta, Canada. It was named Stegoceras lambei in 1945 by Charles Mortram Sternberg, and later renamed Colepiocephale by Robert M. Sullivan in 2003.1
Still debated
Scientists are still debating whether some fossils from the Judith River Formation in Montana belong to Colepiocephale or to another dome-headed dinosaur.1

Where the facts come from

  1. Colepiocephale (en.wikipedia.org)
  2. Colepiocephale lambei | Dinosaur Database by DinoAnimals.com (dinoanimals.com)
  3. Colepiocephale in The Paleobiology Database (CC BY 4.0): age, places, rock formations, classification.

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More from the same group: Dome-heads

Also from the same time: Late Cretaceous

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