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Ankylosaurus

Ankylosaurus is a genus of heavily armoured, four-legged herbivorous dinosaur that lived in the Late Cretaceous of western North America.

By Ethan Anderson| Reviewed by Olivia Bennett, Standards & Fact-Checking Lead| Updated July 26, 2026|2 min read| Fact-checked

Ankylosaurus is a genus of heavily armoured, four-legged herbivorous dinosaur that lived in the Late Cretaceous of western North America. It is best known for its bony body armour and large club-like tail, which likely helped defend it from predators. The name means “fused lizard.”

Description

Ankylosaurus was a low-slung, heavily armoured dinosaur with a broad body, small teeth, and a tail club. Its armour helped protect it from predators, while its build suggests a slow-moving animal.

Discovery and naming

The genus was named by Barnum Brown in 1908. Fossils have been found in western North America, including Canada and the United States.

Life and habitat

Ankylosaurus lived near the end of the Cretaceous in environments that are now part of western North America. It fed on plants and lived alongside other Late Cretaceous dinosaurs.

Classification

Ankylosaurus is an ornithischian dinosaur within Ankylosauria, the armoured dinosaur group. It is one of the largest known ankylosaurs.

Key facts

  • Ankylosaurus belonged to the armoured dinosaur group Ankylosauria.
  • It lived during the Late Cretaceous period in what is now North America.
  • Its body was covered with bony armour plates, and it had a heavy club at the end of its tail.
  • It was a herbivore and moved on four legs.
  • The name Ankylosaurus comes from Greek and means “fused lizard.”
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Canadian context

Fossils of Ankylosaurus have been found in Alberta, making it relevant to Canadian paleontology and museum collections.

Frequently asked questions

What was Ankylosaurus?
Ankylosaurus was a genus of armoured, plant-eating dinosaur from the Late Cretaceous.
What does Ankylosaurus mean?
The name comes from Greek and means “fused lizard.”
Where did Ankylosaurus live?
It lived in western North America, including areas that are now Canada and the United States.
What did Ankylosaurus eat?
It was a herbivore and ate plants.
What made Ankylosaurus distinctive?
Its bony armour and large tail club were its best-known defensive features.

References

  1. Natural History Museumhttps://www.nhm.ac.uk/discover/dino-directory/ankylosaurus.html
    Supports: Late Cretaceous age, armoured dinosaur classification, body armour, tail club, North American distribution
  2. Encyclopaedia Britannicahttps://www.britannica.com/animal/Ankylosaurus
    Supports: Genus description, armoured ornithischian classification, time range, North America
  3. National Geographic Kidshttps://kids.nationalgeographic.com/animals/prehistoric/facts/ankylosaurus
    Supports: Meaning of name, approximate size, herbivorous nature, extinction timing, fossil distribution
  4. Live Sciencehttps://www.livescience.com/25222-ankylosaurus.html
    Supports: Name meaning, Late Cretaceous range, western North America and Alberta distribution, size estimates