Ankylosauria is a group of armored dinosaurs that lived during the Late Jurassic to the Late Cretaceous periods. They are characterized by their heavy bodies, bony plates, and club-like tails, which provided protection against predators. These dinosaurs were herbivorous, primarily feeding on low-lying plants. Ankylosaurs were relatively slow-moving and often found in herds. Their unique body structure, including a fused skull and robust limbs, helped them thrive in various environments. Notable members of this group include Ankylosaurus and Euoplocephalus, which are well-known for their distinctive armor and defensive adaptations.