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Fig. 7. Mean values of the femur angles of C. calyptratus on the perch (triangles) and treadmill (circle) and D. dorsalis on the treadmill (squares). Values include minimum (filled symbols) and maximum (open symbols) long-axis femur rotation (A), femur depression (B), and femur retraction (C). Table 3 summarizes the statistical comparisons among species, inclines and surfaces.