Fig. 10 in A Small Derived Theropod from Öösh, Early Cretaceous, Baykhangor Mongolia

Fig. 10. Systematic variation in antorbital fossa morphology among coelurosaur theropods. Velociraptor mongoliensis (AMNH FR 6515), top, illustrating a dorsal border of the antorbital fossa formed by the lacrimal and maxilla (character 243.0). Archaeopteryx lithographica (WDC-CSG-100), middle, illustrating a dorsal border of the antorbital fossa formed by the lacrimal and nasal (character 243.1). From Mayr et al. (2005). Reprinted with permission from AAAS. Citipati osmolskae (IGM 100/978), bottom, illustrating a dorsal border of the antorbital fossa formed by the maxilla, premaxilla, and lacrimal (character 243.2). Images not to scale.