I have one head and four appendages (two for each side, but only one head bilateral down the middle). I don't see why they couldn't have a leg, bilateral down the middle ( like a head?)
Or a tail
Anyone know if there is "handedness" in tails, particularly in monkeys where they use their tails while climbing. Do individuals always curl their tails clockwise or anticlockwise around a branch?
Well, technically you have a tail too. I suppose a better description would be a spine, stunted in one end (tailbone), extended at the top (head), with two set of limb pairs (arms, legs).