Fig. 3. The gait of M. tuberculata (blue) demonstrates a linear increase in stride frequency with speed, just as the gaits of many other tetrapods do (Heglund and Taylor, 1988). The broken red lines represent the linear best fit regressions for walking (left) and bounding (right) gaits of D. rotundus, truncated at their point of intersection (see Riskin and Hermanson, 2005).