Table 2.
Inter-specific scaling properties of individual and combined articular facet surface areas relative to centroid size and body mass in hominoid primates
| Facet surface area vs. cubed centroid size (CS3) | Facet surface area vs. body mass | ||||||
|---|---|---|---|---|---|---|---|
| Facets | Facet type | Scaling exponent (95% CI) | R2 | Reject isometry? | Scaling exponent (95% CI) | R2 | Reject isometry? |
| Trochlea | Male-type | 0.676 (0.639, 0.713) | 0.998 | No | 0.767 (0.643, 0.891) | 0.986 | No |
| Head | Male-type | 0.654 (0.567, 0.740) | 0.991 | No | 0.741 (0.584, 0.897) | 0.977 | No |
| Sustentaculum | Male-type | 0.744 (0.607, 0.880) | 0.982 | No | 0.841 (0.649, 1.034) | 0.973 | No |
| Calcaneal | Female-type | 0.782 (0.693, 0.872) | 0.993 | Yes | 0.886 (0.688, 1.084) | 0.974 | Yes |
| Head articular unit | Male-type | 0.673 (0.559, 0.787) | 0.985 | No | 0.762 (0.563, 0.961) | 0.965 | No |
| Trochlea articular unit | Mixed | 0.657 (0.605, 0.709) | 0.997 | No | 0.746 (0.620, 0.873) | 0.985 | No |
| Subtalar joint functional unit | Mixed | 0.766 (0.663, 0.869) | 0.991 | No | 0.867 (0.676, 1.058) | 0.975 | Yes |