Fig. 12 in A Small Derived Theropod from Öösh, Early Cretaceous, Baykhangor Mongolia

Fig. 12. Systematic variation in supratemporal fossa morphology among theropod dinosaurs. Mei long (IVPP V12733), top, illustrating a supratemporal fossa with limited extension onto the dorsal surface of the frontal and postorbital (character 245.0). Tyrannosaurus rex (FMNH PR2081), bottom, illustrating a supratemporal fossa with extensive covering of the frontal process of the postorbital and dorsal surface of the frontal (character 245.1). Images not to scale.