FIGURE 58 in The cranial anatomy of Tenontosaurus tilletti Ostrom, 1970 (Dinosauria, Ornithopoda)

FIGURE 58. Posterodorsal view (58.1) of the virtual left surangular (pink) and prearticular (green) and medial view (58.2) of the virtual left prearticular of OMNH 58340. The left image shows the nature of the articulation of the two elements at the point of articulation of the mandible with the quadrate (indicated by arrow). Anterior is into the page in 58.1 and to the right in 58.2. Abbreviations: ap - anterior process; rp - retroarticular process; sa - area of articulation with the splenial.