Fig. 36 in Osteology Of Khaan Mckennai (Oviraptorosauria: Theropoda)

Fig. 36. Right lateral view of the rostrum of A, Velociraptor mongoliensis (AMNH FARB 6515); B, Incisivosaurus gauthieri (IVPP V 13326); C, Khaan mckennai (IGM 100/973); D, Citipati osmolskae (IGM 100/978). Fenestrae of the antorbital region are highlighted: antorbital fenestra (red) and promaxillary fenestra (blue). What may be considered the maxillary fenestra is indicated by yellow. This designation, however, is tenuous. In Incisivosaurus gauthieri, both a fossa (dorsal) and fenestra (ventral) are shown in yellow. The homology of these intermediate structures is uncertain.