The Panoplosaurus was an unusual nodosaurid because it didn't have spikes on its neck. Paleontologists believe that without spikes, the Panoplosaurus defended itself from the Daspletosaurus by using its tail. Edmontonia is considered to be a relative of the Panoplosaurus. Both dinosaurs, which existed during the Late Cretaceous Period, had fused plates on the top of their skulls and oval plates that covered their cheeks. The name Panoplosaurus means "well-armored reptile." The animal's diet consisted largely of soft plants.
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