FIGURE 8 in Heterodonty in Tyrannosaurus rex: Implications for the taxonomic and systematic utility of theropod dentitions

FIGURE 8. Morphologies of pmx4 and mx1 in Tyrannosaurus rex. A, photo traces of distal right premaxilla and mesial right maxilla in palatal view (AMNH 5027); note differences between the classes. B, Lpm4 and Lmx1 (AMNH 5027) in mesiolabial view. C, mx1 (AMNH 5027) in mesial view; note the mesial carina visible on the lingual edge (circle). Rmx1 of FMNH PR2081 in labial (D) and (E) lingual views; note sizes of mx1 and pm4, the flattened shape of the lingual face of pm4, and the placement of the carinae (circle). F, Rpm4 and Rmx1 of BHI 3033 in mesiolabial view; note size differences, carina placement (arrows), and the slight increase in mesial curvature in mx1 (scale bars equal 1cm). G, the teeth in mesiolingual view (image reflected).