FIGURE 6 in The rostral neurovascular system of Tyrannosaurus rex

FIGURE 6. Simplified evolution of the rostral neurovascular systems in Sauropsida in lateral view. A, F, and I figure the course of some branches of the trigeminal nerve, whereas B, C, D, E, G, and H figure the canals of the rostral neurovascular system (see text for descriptions and references). Abbreviation: Cc, conical cavity. Color code: Black, teeth; Blue, maxillary canal (or nerve when applicable); Green, mandibular canal (or nerve when applicable); Red, ophthalmic nerve; Yellow, premaxillary canal. Dotted lines represent non-nervous structures (e.g., orbits, nostrils, cranial fenestrae, and conical cavity). Drawings not to scale.