Fig. 10 in Evolution of the pterosaur pelvis

Fig. 10. Stance comparisons in ornithocheiroid (A) and non-ornithocheiroid pterodactyloids (B). Note that, to assume the posture suggested by pterodactyloid tracks, the long ornithocheirid forelimb necessitates an erect stance that requires rotation of the ischiopubic plate to ensure suitable anchorage for the hindlimb musculature.