Limbs: Araeoscelis (Protorosauria), Hallopus (Dinosauria), Pteranodon (Pterosauria), Samuel Wendell Williston, 1925

Illustration of limbs of araeoscelis, hallopus, and pteranodon from the osteology of the reptiles (1925). Date: 1925. The Osteology of the Reptiles p190