“…Taxa with more lightweight and distally light legs should possess lower locomotor costs and may attain higher speeds (Lull, 1904;Gregory, 1912;Howell, 1944;Smith and Savage, 1956;Gray, 1968;Gambaryan, 1974;Hildebrand, 1984Hildebrand, , 1985Hildebrand, , 1988Hildebrand and Hurley, 1985;Steudel, 1990;Wickler et al, 2004;Raichlen, 2005Raichlen, , 2006Browning et al, 2007). In contrast, taxa with more massive and distally heavy legs should incur higher locomotor costs or might be restricted to slower speeds of terrestrial locomotion (e.g.…”