Fig. 4From: A new sphenodontian (Diapsida: Lepidosauria) from the Upper Triassic (Norian) of Germany and its implications for the mode of sphenodontian evolutionNasals in A dorsal; B ventral; C left lateral and D right lateral view. Abbreviations: Ant. proc, anterior process; F. fct, frontal facet; Mx. fct, maxillary facet; Post. proc, posterior process; Prf. fct, prefrontal facetBack to article page