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Photos of the forearms of (a) Propithecus sp. (0.45x, left); (b) Lemur catta (0.52x, left); (c) Sapajus libidinosus (0.34x, right); (d) Ateles sp. (0.1x, right); (e) Callithrix sp. (0.3x, right); (f) Aotus sp. (0.8x, right); (g) Macaca fuscata (0.34x, right); (h) Pongo sp. (0.79x, left); (i) Pan sp. (0.23x, left). From (a) to (f), muscles are pennate and from (g) to (i) are fusiform. ∗ indicates the palmaris longus.
