Table 4. Ratio of pelvic planes (AP/ML x 100) based on measures reported in Tables 1 and 3.
| Specimen | Inlet (AP/ML) | Midplane (AP/ML) | Outlet (AP/ML) |
|---|---|---|---|
| A. L. 288-1a | 57.6 | 71.2 | 74.0 |
| A. L. 288-1b | 64.3 | 129.7 | 108.3 |
| Sts 14 | 71.2 | 78.7 | NA |
| BSN 49/P27 | 78.7 | 97.4 | 83.6 |
| A. sediba | 71.9 | 97.1–100.6 | 91.2–94.3 |
| Tabun 1c | 79.9 | 115.3 | 106.2 |
| Tabun 1d | 79.4 | NA | 70.5 |
| Modern Humane | 73.2–83.0 | 116–127 | 96.7 |
| Modern Humanf | 86.6 | 120.7 | 103.7 |
| Chimpanzee | 151.1 | 164.8 | 116.6 |
A.L. 288-1a measures from Tague and Lovejoy [17].
A.L. 288-1b ratios are the average of two reconstructions from Häusler and Schmid [25]. The range reported for A. sediba’s midplane and outlet indices reflect the estimated measures derived from utilization of the other hominin ischia.
Tabun 1c average measurements used from range reported by Ponce de León et al. [36].
Tabun 1d measures from Weaver and Hublin [37].
The modern humane range encompasses the average values reported in Tague and Lovejoy [17], Simpson et al. [34], and Kibii et al. [42].
Modern humanf is the average of data (unpublished) provided to the authors by H. Kurki (n = 187).