Ankylosaurus

"Fused Lizard"

Perhaps the last and largest of the armored dinosaurs called Ankylosaurus is often described as a "walking tank." The 35 foot low-slung and heavy animal slowed an intricate arrangement of thick bony plates across it back, head and other vulnerable areas. The bones of the last third of its tail were held rigidly together by overlapping connections; the tail itself ended in a large bulbous club. The stiffened tail and club could have delivered a blow to an attacking predator.