genus of reptiles (fossil)
Temporal range: Lower Cretaceous
|Armour of Polacanthus foxii|
Owen vide Anonymous, 1865
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.