Figure 4 in Nanotyrannus, a new genus of pygmy tyrannosaur, from the latest Cretaceous of Montana

Figure 4—Ventral views of theropod basicrania, drawn to a common distance of the occipital condyle-to-basipterygoid web. Osteological abbreviations: asc scar ascending muscle scar on the posterior-inner corner of the basituber. basiocc basioccipital. basph basisphenoid. baspt basipterygoid processes, basiph scar oval scar on the basisphenoid boxwork wall, bastub basituber. cav midline ventral cavity in the basisphenoid. con occipital condyle, desc paroc descending ventral root of the paroccipital process, mid scar midline scar on the posterior face of the basisphenoid. pa.wing parietal wing of the occipital plate, ser.rug serrated tendon scar on the outer corner of the parietal wing, sup.cap caps on the supraoccipital wedge, web transverse web of bone between basipterygoid process or basisphenoid processes, wedge supraoccipital wedge.