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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
