Fig. 8 in A Small Derived Theropod from Öösh, Early Cretaceous, Baykhangor Mongolia

Fig. 8. Systematic variation in antorbital fenestra morphology among paravian theropods. Diomedea epomophora (AMNH 5311), top, illustrating a reduced dorsal ramus of the nasal process of maxilla (character 240.1) and a ventral ramus of the maxilla with no dorsal projection participating in the anterior margin of the antorbital fenestra (character 241.2). Velociraptor mongoliensis (AMNH FR 6515), bottom, illustrating a prominent dorsal ramus of the nasal process of maxilla that is exposed medially and laterally (character 240.0) and extensive participation of the ventral ramus of the nasal process of the maxilla in the anterior margin of the antorbital fenestra (character 241.0). Images not to scale.