Fig. 3. Freedom of intermetatarsal movement of right Gorgosaurus libratus arctometatarsus (TMP 94.12.602), as determined through CT reconstructions. a: Proximal view near ankle. Proximal expansion of MT III at the exposed cross section is outlined in white. Anterior and posterior projections of the outer metatarsals constrained this portion of MT III from anteroposterior rotation. This partially clasped morphology functioned as a pivot point, enabling ligament-damped displacement of the distal third metatarsal. b: Distal view, with metatarsals cross sectioned 70% of their length from their proximal end. Arrows show a sliding motion possible between MT II and MT III, and a slight rotational motion between MT IV and MT III.