Looks pretty good to me, physiology is such a cool thing to study, and love how you've brought these things to life. Looking at some Pteranodon skeletons though and the skeleton/muscle anatomy you did prior, I think you may have missed out the claws on the end of the metacarpal bone?

Otherwise everything looks fantastic! Very talented indeed :0

Thanks! I totally see what you're talking about. As far as I could tell the skeletons of a pteranodon sternbergi had no claws- but other illustrations showed they did. So I wasn't sure whether to add them or not. But you're totally right, most pteranodons have those claws.

Think it must be, on further digging Sternbergi and Longiceps seem to be the only recognised species of Pteranodon, and the only difference between the 2 was in the skull structure (primarily the shape and curvature crest). Other done that it appears they were almost identical. Regardless, gonna say again that's it's awesome. It's given me an idea for something. Wonder what the theoretical physiology of a dragon would be like.

Maybe I should take up paleontology as a hobby XD