English: Edmontonia longiceps is a bulky nodosaurid ankylosaur from the Late Cretaceous of what is now Canada. Its length is estimated around 6 m, and it weighed about 3 t. Typical of ankylosaurs, Edmontonia was covered in osteoderms, forming a bony armor, as well as sharp spikes along its sides. The four largest spikes jutted out from the shoulders on each side, pointing forward. These strange large spikes were probably used for intimidation against predators, as well as contests of strength between males fighting for territory or mates.