Fig. 6

Anthropoid primary dietary category and lower molar proportions (n=100). Points are species mean molar proportions. Colors denote species’ primary dietary category. Dashed line indicates DIC model’s predicted relationship between molar proportion ratios: M ₃/M ₁=2(M ₂/M ₁)−1. White regions are locations in molar proportion morphospace consistent with the DIC model: a high a/i region where M ₁<M ₂<M ₃ and a low a/i region where M ₁>M ₂>M ₃