FIGURE 5 in Heterodonty in Tyrannosaurus rex: Implications for the taxonomic and systematic utility of theropod dentitions

FIGURE 5. Premaxillary tooth morphology in Tyrannosaurus rex. A, idealized skulls of T. rex and Dromaeosaurus in palatal view, showing variation in snout shape (after Molnar, 1998, and Currie, 1995). B, photo trace of AMNH 5027 in palatal view showing labiolingual crown longaxis orientations (teeth are schematic; dashed line is sagittal plane). C, photo trace of Allosaurus (YPM 1333) in palatal view, showing morphology and carinae of Rpm2–5. D, right premaxilla of Majungatholus (FMNH PR 2100) in occlusal view.