The front end of a kilopede. It's a cool trophy from a thrilling battle, but you have to tell everyone "this is a kilopede skull" because it isn't really identifiable as such without the legs. And then you have to deal with, on one side, all the fancy-pants science types telling you insects don't have skulls, and on the other side, fancy-pants fashion types looking at you weird for wearing a skull on your head. Make up your minds, you guys! You can't have it both ways!