Polacanthus

Polacanthus was an armoured, spiked, plant-eating dinosaur from the Lower Cretaceous, about 132 to 100 million years ago. Polacanthus means "many spines."

Polacanthus Temporal range: Lower Cretaceous
Armour of Polacanthus foxii
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Sauropsida
Superorder:	Dinosauria
Order:	Ornithischia
Suborder:	Thyreophora
Infraorder:	Ankylosauria
Family:	Ankylosauridae
Subfamily:	Polacanthinae
Genus:	Polacanthus Owen vide Anonymous, 1865

Some paleontologists think that Polacanthus is the same genus as Hylaeosaurus. Fossils of this ankylosaurid have been found in England.

Description

Polacanthus was about 12 feet (4 m) long and about 4.8 feet (1.5 m) tall. It was a bulky quadruped that relied on its many rows of bony spikes for protection. No head is known for this genus.

Hypothetical P. foxii restoration, based mostly on Gastonia