>>120914991. They're impractical. Wheels only work better than limbs on flat ground. Turning radius is large meaning it would be harder to avoid predators/chase prey. Additionally, they would be hard to evolve into. Fins were the precursor to legs, what would be the precursor to wheels?
2. Flat surface. Radically different ancestor animals, probably which had evolved systems to deal with moving, disconnected parts. As a result it's hard to predict what they would look like. Personally, I think a centipede like animal with wheels would be a cool look
