FIGURE 40 in The cranial anatomy of Tenontosaurus tilletti Ostrom, 1970 (Dinosauria, Ornithopoda)

FIGURE 40. Horizontal CT image, taken at the level of the trigeminal foramina, of the basisphenoid and parasphenoid (orange), laterosphenoids (pink and light blue), trigeminal nerve foramina (yellow), prootics (teal and red), horizontal semicircular canals (purple), and exoccipital/opisthotic (green) of OMNH 58340. The endocast is the black and gray area in the middle of the image. The ventral processes of the supraoccipital can also be seen, as well as their peculiar density. Faint green lines are an artifact of the program used to define the element on each image. Anterior is down. Abbreviations: sc - horizontal semicircular canals; vp - ventral processes.