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. 2015 Aug 3;112(37):11467–11472. doi: 10.1073/pnas.1513075112

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Fig. 4. — Trends over time for percentages of C₃ browsers, C₃–C₄ mixed feeders, bovid C₄ grazers, and nonbovid C₄ grazers in the Kanapoi, Nachukui, and Koobi Fora Formations and modern ecosystems in East and Central Afria for APP taxa (excluding Neotragini and Cephalophini because of their rarity in the fossil assemblages). (A) Fossil assemblages from Kanapoi, Koobi Fora, and Nachukui Formations; time intervals as described in text (data from Dataset S2). (B) Modern ecosystems studied (see SI Appendix, Table S1; data from Dataset S1).