Boneslider

The boneslider replaced the boneripper. Due to competition for the food in the Bone swamp speed was favoured and that made the boneslider evolve a sligthly different way to move. Its hands now function as feet as well as hands and are used to shove the boneslider forward, while the other part of the body slither. This combined looks kind of weird, but it made the boneslider fast enough to be favored. To be able to slide easier on the rough ground its stomach secrete a slime-like substance. Since the hands/feet now are mostly used for moving the teeth and jaws of the boneslider have evolved to work as the creatures main weapon, together with the poisonous spike on the tail. The boneslider can still swim as good as its ancestor and uses snake like movements combined with swinging with its arms.