No vertebrates has more than four limbs, right? Due to nature’s design of the rib cage, with muscles to move the front limbs occupying a large part of it, and the trapezius and latissimus dorsi being connected to the head and the pelvis, having six limbs on a vertebrate is just not very credible IMO. Still we’ve all grown accustomed to images of dragons with wings in addition to arms. So I wonder: Has anyone ever seen a well thought through design of a six limbed dragon? With wing musculature bypassing the trapezius and latissimus dorsi in a believable way? And extra set of those two muscles? Fitting how and where? And if so: Post an image? Link? A brilliant design of your own?
Could this be an interesting theme for a challenge thread, perhaps?