Table 3.
Results of reduced major axis regressions assessing femoral 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 | 49 | 4.09 | 1.611 | 0.8175 | 0.7761 | 0.8532 | 0.98 | R | <0.0001 |
| Tyrannosaurus rex | 21 | 1.87 | 2.703 | 0.5341 | 0.04159 | 0.9718 | 0.853 | R | 0.0582 |
| Tarbosaurus bataar | 5 | 1.73 | 1.603 | 0.8176 | 0.6709 | 0.9489 | 0.997 | R | 0.0395 |
| Gorgosaurus libratus | 12 | 2.30 | 1.855 | 0.7666 | 0.5858 | 0.8522 | 0.945 | R | 0.0996 |
| Daspletosaurus torosus | 6 | 1.55 | 1.873 | 0.7465 | -0.261 | 0.9294 | 0.955 | R | 0.277 |
| Gallimimus bullatus | 5 | 2.46 | 2.131 | 0.8187 | 0.653 | 1.271 | 0.983 | I | 0.1961 |
| Herrerasaurus ischigualastensis | 5 | 1.72 | 1.989 | 0.8081 | 0.24 | 1.175 | 0.828 | I | 0.4217 |
| Troodon formosus | 7 | 1.92 | 1.801 | 0.8632 | 0.46 | 1.296 | 0.796 | I | 0.7363 |
| Sauropodomorpha | |||||||||
| Massospondylus carinatus | 16 | 4.43 | 2.747 | 0.8135 | 0.6412 | 0.9078 | 0.905 | R | 0.0925 |
| Riojasaurus incertus | 8 | 2.01 | 2.174 | 0.7437 | 0.547 | 1.068 | 0.826 | I | 0.1514 |
| Apatosaurus sp. | 12 | 5.48 | 1.007 | 0.9709 | 0.913 | 1.029 | 0.993 | I | 0.5953 |
| Camarasaurus sp. | 27 | 4.83 | 0.7948 | 1.000 | 0.925 | 1.065 | 0.969 | I | 0.9989 |
| Diplodocus sp. | 23 | 3.31 | 0.8925 | 1.022 | 0.931 | 1.172 | 0.914 | I | 0.8215 |
| Ornithopoda | |||||||||
| Tenontosaurus tilletti | 6 | 1.99 | 0.7595 | 1.035 | 0.923 | 1.18 | 0.978 | I | 0.7035 |
| Dryosaurus lettowvorbecki | 27 | 2.86 | 1.003 | 0.9902 | 0.93 | 1.05 | 0.979 | I | 0.7387 |
| Hypacrosaurus stebingeri | 12 | 19.04 | 0.3969 | 1.094 | 1.072 | 1.113 | 0.999 | G | 0.0001 |
| Maiasaura peeblesorum | 23 | 8.10 | 0.9214 | 1.052 | 1.025 | 1.081 | 0.996 | G | 0.0134 |
| Stegosauria | |||||||||
| Stegosaurus stenops | 6 | 4.27 | 0.8649 | 1.043 | 0.665 | 1.8 | 0.973 | I | 0.8848 |
| Kentrosaurus aethiopicus | 37 | 2.56 | 1.039 | 0.9675 | 0.907 | 1.04 | 0.954 | I | 0.5088 |
| Ceratopsia | |||||||||
| Pachyrhinosaurus sp. | 8 | 2.79 | 0.9107 | 1.01 | 0.916 | 1.229 | 0.969 | I | 0.8628 |
| Centrosaurus apertus | 4 | 1.75 | 0.9067 | 0.9911 | 0.962 | 2.064 | 0.998 | I | 0.6887 |
| Chasmosaurus mariscalensis | 21 | 3.10 | 1.670 | 0.8651 | 0.8236 | 0.9021 | 0.978 | R | 0.0009 |
| Psittacosaurus lujiatunensis | 5 | 1.48 | 0.3927 | 1.292 | 0.709 | 1.779 | 0.875 | I | 0.4709 |
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.