Fig. 13 in A Small Derived Theropod from Öösh, Early Cretaceous, Baykhangor Mongolia

Fig. 13. Systematic variation in jugal/antorbital fenestra morphology in theropod dinosaurs. Oviraptor philoceratops (AMNH 6517), bottom, illustrating a jugal that does not participate in the antorbital fenestra (character 246.0). Tsaagan mangas (IGM 100/1015), top, illustrating a jugal that does participate in the antorbital fenestra (character 246.1). Images not to scale.