Table 9 in A Computational Analysis of Limb and Body Dimensions in Tyrannosaurus rex with Implications for Locomotion, Ontogeny, and Growth

Table 9. Estimates of extensor muscle masses (total acting about each joint in one hindlimb) for tyrannosaur specimens. Extensor mass as % body mass per jointJointCarnegieSueStanMORJaneHip min9.059.1012.311.913.2Hip max8.7910.715.113.917.6Knee min4.104.405.685.764.94Knee max3.294.807.076.847.27Ankle min2.331.902.522.422.46Ankle max2.552.003.222.993.93TOTAL MIN15.515.420.520.120.6TOTAL MAX14.617.625.423.728.8 As described in the methods we estimated muscle volumes from limb segment volumes (minus bone volumesı which were small fractions (~5%) of the segment volumes) as in Hutchinson et al. (2007). We adjusted those non-bony segment volumes by multiplying them by the percentages of segment mass observed in extant Sauria (based on dissection data from Hutchinsonı 2004aıb) that are dedicated to extensor muscles. The hip extensor estimate was 54% of thigh mass (plus CFL mass from Table 8)ı the knee extensor estimate was 34% of thigh massı and the ankle extensor estimate was 47% of shank mass. doi:10.1371/journal.pone.0026037.t009