Types of Dinosaurs.
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Hylaeosauruss

Mounted Allosaurus skeleton, a large Jurassic predatory dinosaur
Photo: Jens Lallensack, CC BY-SA 4.0, via Wikimedia Commons
Pronunciation
hy-LAY-uh-SAWR-us
Name means
Woodland Lizard
Also known as
Polacanthus and Polacanthoides
Diet
Herbivore
Posture
Quadrupedal
Period
Early Cretaceous
Length
15 feet (4.6 meters)
Height
6 feet (1.8 meters)

Order: Ornithischia · Suborder: Thyreophora · Infraorder: Ankylosauria · Family: Nodosauridae

Hylaeosaurus had rows of horny, triangular-shaped spines running down its back. For further protection against predators, its hips were covered with a bony plate. Hylaeosaurusis one of the first three dinosaurs to be named, the other two beingIguanodon and Megalosaurus.

Mounted Stegosaurus skeleton with rows of back plates and tail spikes
Gary Todd from Xinzheng, China, public domain, via Wikimedia Commons

More Cretaceous-period dinosaurs →

Reference background: Natural History Museum, London — Dinosaurs; Smithsonian National Museum of Natural History — Dinosaurs; American Museum of Natural History — Dinosaurs & Fossils. Figures are typical published ranges; taxonomy follows the source era and modern consensus is noted where it differs. See our sources & fact-check policy.

Frequently asked questions

What does Hylaeosauruss mean?

The name Hylaeosauruss means “Woodland Lizard”. It is pronounced hy-LAY-uh-SAWR-us.

When did Hylaeosauruss live?

Hylaeosauruss lived during the Early Cretaceous.

Was Hylaeosauruss a carnivore or a herbivore?

Hylaeosauruss was a herbivore.

How big was Hylaeosauruss?

Hylaeosauruss was about 15 feet (4.6 meters) long, around 6 feet (1.8 meters) tall.

Related dinosaurs

Other dinosaurs from the Nodosauridae family.

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