In a world I'm designing, there's a race that look like the picture below, except that the race has heavily hunched bodies. The race's arms and torso are hulking, heavily built, and muscular, but the legs are very small and thin in comparison. which is why they are quadruple, The race's king and queen have red crests and red-fringed tails, while the ordinary citizens of the race don't have these red crests and red fringed tails. They are nomadic ,sapient, and capable of speech, and all descendants of the king and queen have red crests and red fringed tails, while the descendants of all the others don't have red crests and red fringed tails. The ams are so long that the hands rest on the ground. Now for the question:
Why would my race have arms longer then the legs?