User blog comment:Lord Loss/Monster Hunter Theory... Blog/@comment-4212769-20120302173919/@comment-3057194-20120303125044

i think that the deformation to get an extra pair of limbs could occur with climbing animals, but the limbs would not come on the back. it would be more like the animals from avatar (the smurf aliens). after that one pair might evolve into wings in the same way bats evolved wings (bats are probably evolved from shrewmice)