Fig. 8. Footfall patterns, beginning and ending with left hind footfall, on the treadmill for (A) bounding D. rotundus, (B) a bounding quadrupedal rodent (see Hildebrand, 1985), (C) walking D. rotundus, and (D) M. tuberculata using their single gait. Solid bars indicate the time that a foot is in contact with the ground. Open bars represent one standard deviation above and below the mean. F, fore; H, hind; L, left; R, right. Note that the bounding gait of D. rotundus is superficially similar to the bounding rodent gait, but with the footfall patterns of the forelimbs and hindlimbs reversed.