Table 4.
Results of reduced major axis regressions assessing tibial allometry for each dinosaur species.
| Taxon | N | Size range (x) | RMA intercept | RMA slope | Lower Limit (95%) | Upper Limit (95%) | R2 | Growth pattern | P |
|---|---|---|---|---|---|---|---|---|---|
| Theropoda | |||||||||
| Allosaurus fragilis | 44 | 2.63 | 1.638 | 0.801 | 0.7419 | 0.8804 | 0.942 | R | 0.0015 |
| Tyrannosaurus rex | 8 | 1.49 | 4.452 | 0.4242 | −1.029 | 1.047 | 0.845 | I | 0.1149 |
| Tarbosaurus bataar | 4 | 1.48 | 3.089 | 0.3911 | 0.2279 | 0.5544 | 0.981 | R | 0.1987 |
| Gorgosaurus libratus | 10 | 1.95 | 2.16 | 0.8348 | 0.696 | 1.175 | 0.838 | I | 0.3338 |
| Gallimimus bullatus | 7 | 2.42 | 2.975 | 0.6771 | −0.581 | 1.017 | 0.781 | I | 0.1423 |
| Herrerasaurus ischigualastensis | 6 | 1.60 | 1.282 | 0.9795 | 0.604 | 1.621 | 0.806 | I | 0.89 |
| Troodon formosus | 8 | 1.92 | 1.77 | 0.945 | 0.734 | 1.08 | 0.967 | I | 0.628 |
| Sauropodomorpha | |||||||||
| Riojasaurus incertus | 7 | 1.65 | 1.713 | 0.6871 | 0.246 | 1.166 | 0.621 | I | 0.5124 |
| Apatosaurus sp. | 14 | 7.11 | 0.0250 | 1.130 | 1.066 | 1.189 | 0.989 | G | 0.0086 |
| Camarasaurus sp. | 15 | 3.13 | −0.0593 | 1.142 | 0.969 | 1.325 | 0.945 | I | 0.1867 |
| Diplodocus sp. | 20 | 3.72 | 0.1244 | 1.150 | 0.965 | 1.306 | 0.929 | I | 0.2413 |
| Ornithopoda | |||||||||
| Tenontosaurus tilletti | 7 | 2.22 | 1.562 | 0.7731 | 0.5708 | 0.972 | 0.944 | R | 0.0826 |
| Dryosaurus lettowvorbecki | 17 | 3.24 | 1.317 | 0.9792 | 0.899 | 1.101 | 0.968 | I | 0.7879 |
| Hypacrosaurus stebingeri | 10 | 16.06 | 0.7319 | 1.118 | 1.049 | 1.196 | 0.993 | G | 0.0608 |
| Maiasaura peeblesorum | 48 | 9.26 | 1.089 | 1.031 | 1.011 | 1.052 | 0.995 | G | 0.0405 |
| Stegosauria | |||||||||
| Stegosaurus stenops | 4 | 5.22 | 0.1813 | 1.2 | 1 | 3.96 | 0.951 | I | 0.7897 |
| Ceratopsia | |||||||||
| Centrosaurus apertus | 7 | 2.19 | 1.1 | 0.8725 | 0.733 | 1.026 | 0.969 | I | 0.2662 |
R, I, and G denote growth patterns of negative allometry, isometry, and positive allometry, respectively. Lower and upper limits are the 95% confidence limits for the slope. P-values are the results of permutation tests (with 10 000 permutations). Permutation tests indicate significant departures from isometry if P<0.05. P-values are highlighted in bold in instances where the results of permutation tests disagree with the growth patterns indicated by the range of the slope confidence limits.