Damocles is a genus of chondrichthyan from the Mississippian age Bear Gulch Limestone of Montana and the city of Armagh, Northern Ireland. Two species, D. serratus and D. attenuatus, have been assigned,[1] [2] with D. attenuatus originally being classified as a species of the form-genus Physonemus.[3] Members of the genus were carnivorous, and males possessed a distinctive serrated, sword-like reproductive organ which was positioned over their head.