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. Author manuscript; available in PMC: 2011 Apr 26.
Published in final edited form as: J Hum Evol. 2009 Oct 28;57(6):710–720. doi: 10.1016/j.jhevol.2009.06.001

Figure 2.

Figure 2

Figure 2

Box plot comparing relative differences in a) PCSA and b) fiber length, between C. apella and untufted capuchins. From left to right, superficial masseter (light gray), deep masseter (white), whole masseter (black), and temporalis (dark gray). C. apella has relatively larger masseter and temporalis PCSAs compared to untufted capuchins, but only differences in relative temporalis PCSA are significant following Bonferroni adjustment. There are no differences in relative fiber length (or pinnation angle, see Table 2). These findings indicate that there is no architectural tradeoff between jaw-muscle PCSA and fiber length.