Scaling of morphological traits against cranial length across all species included in our analysis
| . | R . | P . | Slope . | Intercept . |
|---|---|---|---|---|
| Mass | ||||
| m. digastricus | 0.89 | 0.47 | 3.02 | –2.87 |
| m. masseter | 0.92 | 0.24 | 2.77 | –2.20 |
| m. temporalis | 0.84 | 0.04 | 2.28 | –0.80 |
| m. pterygoideus | 0.91 | 0.17 | 2.67 | –2.37 |
| Fiber length | ||||
| m. digastricus | 0.73 | 0.49 | 0.85 | –2.25 |
| m. masseter | 0.86 | <0.01 | 0.69 | –0.35 |
| m. temporalis | 0.72 | 0.01 | 0.59 | –0.09 |
| m. pterygoideus | 0.77 | 0.13 | 0.79 | –0.64 |
| Physiological cross section | ||||
| m. digastricus | 0.87 | 0.31 | 2.12 | –2.60 |
| m. masseter | 0.85 | 0.24 | 2.27 | –2.54 |
| m. temporalis | 0.84 | 0.31 | 1.84 | –1.22 |
| m. pterygoideus | 0.88 | 0.31 | 1.87 | –1.71 |
| Bite force | 0.75 | 0.24 | 1.71 | –1.59 |
| Joint force | 0.78 | 0.15 | 1.63 | –1.02 |
| . | R . | P . | Slope . | Intercept . |
|---|---|---|---|---|
| Mass | ||||
| m. digastricus | 0.89 | 0.47 | 3.02 | –2.87 |
| m. masseter | 0.92 | 0.24 | 2.77 | –2.20 |
| m. temporalis | 0.84 | 0.04 | 2.28 | –0.80 |
| m. pterygoideus | 0.91 | 0.17 | 2.67 | –2.37 |
| Fiber length | ||||
| m. digastricus | 0.73 | 0.49 | 0.85 | –2.25 |
| m. masseter | 0.86 | <0.01 | 0.69 | –0.35 |
| m. temporalis | 0.72 | 0.01 | 0.59 | –0.09 |
| m. pterygoideus | 0.77 | 0.13 | 0.79 | –0.64 |
| Physiological cross section | ||||
| m. digastricus | 0.87 | 0.31 | 2.12 | –2.60 |
| m. masseter | 0.85 | 0.24 | 2.27 | –2.54 |
| m. temporalis | 0.84 | 0.31 | 1.84 | –1.22 |
| m. pterygoideus | 0.88 | 0.31 | 1.87 | –1.71 |
| Bite force | 0.75 | 0.24 | 1.71 | –1.59 |
| Joint force | 0.78 | 0.15 | 1.63 | –1.02 |
Slope values in bold type differ significantly from the slope predicted by geometric similarity models (1 for linear dimensions, 2 for areas and forces and 3 for mass)