胄甲龙属（属名：Panoplosaurus）意为「装甲蜥蜴」，是已知生存年代最晚的结节龙科。结节龙科属于甲龙下目，是草食性恐龙，并存活了1亿2000万年。最早的结节龙科恐龙出现于1亿8500万年前的中侏㑩纪。胄甲龙出现于1亿年后的晚白垩纪，并存活到白垩纪末。

胄甲龙生存于北美洲，目前已在蒙大拿州、亚伯达省发现化石。牠们身长5.5到7公尺，而尾巴长达2公尺。胄甲龙重量约3.5吨。胄甲龙的头部覆盖者头盔状的骨板，但尾巴没有骨槌。从背部到尾巴覆盖者骨板，上有多排针状物。肩膀处有方形鳞甲，身体两侧有大型尖刺。

Panoplosaurus (meaning "completely armoured lizard") is a genus of nodosaurid dinosaur. It was one of the last known nodosaurids, living during the Late Cretaceous in what is now North America; fossils have been located in Alberta, Canada.

The first fossil was found in 1917 by Charles M. Sternberg in Quarry 8, near Little Sandhill Creek. The type species Panoplosaurus mirus was named by Lawrence M. Lambe in 1919. The generic name is derived from Greek pan, "completely" and hoplon, "armour". The specific name means "wondrous" in Latin.