Table 3.
Intra-specific scaling properties of individual and combined articular facet surface areas relative to centroid size in hominoid primates
| Facet | Facet type | Scaling exponent (95% CI) | R2 | Reject isometric scaling with centroid size? |
|---|---|---|---|---|
| Hylobates moloch | ||||
| Trochlea | Male-type | 0.602 (0.381, 0.822) | 0.832 | No |
| Head | Male-type | 0.682 (0.267, 1.096) | 0.538 | No |
| Sustentaculum | Male-type | 0.794 (0.398, 1.191) | 0.688 | No |
| Calcaneal | Female-type | 0.708 (0.392, 1.023) | 0.752 | No |
| Head articular unit | Male-type | 0.702 (0.445, 0.959) | 0.833 | No |
| Trochlea articular unit | Mixed (mainly male) | 0.584 (0.403, 0.764) | 0.880 | No |
| Subtalar joint functional unit | Mixed | 0.719 (0.414, 1.025) | 0.774 | No |
| Symphalangus syndactylus | ||||
| Trochlea | Male-type | 0.852 (0.549, 1.156) | 0.809 | No |
| Head | Male-type | 0.752 (0.377, 1.128) | 0.626 | No |
| Sustentaculum | Male-type | 0.946 (0.431, 1.460) | 0.555 | No |
| Calcaneal | Female-type | 0.922 (0.601, 1.244) | 0.817 | No |
| Head articular unit | Male-type | 0.631 (0.524, 0.737) | 0.957 | No |
| Trochlea articular unit | Mixed (mainly male) | 0.719 (0.545, 0.893) | 0.912 | No |
| Subtalar joint functional unit | Mixed | 0.844 (0.592, 1.096) | 0.866 | No |
| Pongo pygmaeus | ||||
| Trochlea | Male-type | 0.860 (0.766, 0.954) | 0.973 | Yes |
| Head | Male-type | 0.667 (0.463, 0.871) | 0.788 | No |
| Sustentaculum | Male-type | 0.766 (0.418, 1.114) | 0.531 | No |
| Calcaneal | Female-type | 0.733 (0.599, 0.867) | 0.924 | No |
| Head articular unit | Male-type | 0.567 (0.430, 0.704) | 0.867 | No |
| Trochlea articular unit | Mixed (mainly male) | 0.760 (0.674, 0.847) | 0.970 | Yes |
| Subtalar joint functional unit | Mixed | 0.700 (0.528, 0.873) | 0.862 | No |
| Gorilla gorilla | ||||
| Trochlea | Male-type | 0.633 (0.551, 0.716) | 0.883 | No |
| Head | Male-type | 0.576 (0.489, 0.663) | 0.841 | Yes (negative allometry) |
| Sustentaculum | Male-type | 0.767 (0.622, 0.912) | 0.753 | No |
| Calcaneal | Female-type | 0.811 (0.739, 0.882) | 0.947 | Yes |
| Head articular unit | Male-type | 0.642 (0.554, 0.729) | 0.872 | No |
| Trochlea articular unit | Mixed (mainly male) | 0.659 (0.613, 0.705) | 0.966 | No |
| Subtalar joint functional unit | Mixed | 0.764 (0.685, 0.844) | 0.925 | Yes |
| Pan troglodytes | ||||
| Trochlea | Male-type | 0.635 (0.521, 0.750) | 0.776 | No |
| Head | Male-type | 0.909 (0.713, 1.106) | 0.676 | Yes |
| Sustentaculum | Male-type | 0.908 (0.660, 1.155) | 0.484 | No |
| Calcaneal | Female-type | 0.966 (0.782, 1.150) | 0.747 | Yes |
| Head articular unit | Male-type | 0.761 (0.615, 0.907) | 0.744 | No |
| Trochlea articular unit | Mixed (mainly male) | 0.738 (0.617, 0.858) | 0.815 | No |
| Subtalar joint functional unit | Mixed | 0.840 (0.703, 0.976) | 0.817 | Yes |
| Homo sapiens | ||||
| Trochlea | Male-type | 0.682 (0.621, 0.743) | 0.888 | No |
| Head | Male-type | 0.717 (0.644, 0.791) | 0.855 | No |
| Sustentaculum | Male-type | 0.625 (0.521, 0.729) | 0.615 | No |
| Calcaneal | Female-type | 0.626 (0.560, 0.692) | 0.845 | No |
| Head articular unit | Male-type | 0.670 (0.604, 0.737) | 0.863 | No |
| Trochlea articular unit | Mixed (mainly male) | 0.667 (0.606, 0.728) | 0.883 | No |
| Subtalar joint functional unit | Mixed | 0.596 (0.530, 0.661) | 0.831 | Yes (negative allometry) |