Fig. 5

Sitatunga skull (cranial view). 1, Lacrimal; 2, 3, Maxilla; 4, Premaxilla; 5, Sinus; 6, Perpendicular plate; 7, Ethmoturbinate; top 8, Dorsal turbinate; below 8, Vomer; 10, Palatine process of premaxilla; 11, Palatine fissure