Tag

But the forelimb of Bunostegos is “seemingly directed underneath its body…” Turner said that the elements and features within the forelimb bones won’t permit a sprawling posture, and it is unique.

Finally, there is the the fact that the ulna is longer than the humerus, a notable trait seen in most upright walkers. Their limbs were extended out from the side of their bodies and they used their spines to push themselves ahead just like reptiles today.

Well, either this or at least it’s the oldest creature known to walk upright on all its fours limbs thus far documented by science, specialists explain in their report in the Journal of Vertebrate Paleontology.