Pterosaur claws

Diagnostic characteristics of pterosaur claws:

-Symmetrical vein grooves

-The bottom of the digit claw is flat.

-The bend at the end of the tip is a specific trait of Pterosaur claws: The tip shows a thin flange or ridge of bone on the very tip on the ventral edge. It could be considered an adaptation for the best grip when perching on steep surfaces. That flange aids in hooking on cliffs.