Fig. 16From: A new sphenodontian (Diapsida: Lepidosauria) from the Upper Triassic (Norian) of Germany and its implications for the mode of sphenodontian evolutionPterygoids in A dorsal, B ventral, C-D left lateral, and E-F right lateral view. Abbreviations: Ant. proc, anterior process; Bs. fct, basisphenoid facet; Ec. fct, ectopterygoid facet; Pa. fct, palatine facet; Post. lat. proc, posterolateral process. Arrowheads indicate the position of palatal teeth on the pterygoidsBack to article page