Comparative site-specific structural morphology of the hip bone in Oreopithecus (IGF 11778), Homo (SCR 352), Pan (PVA 2706), Hylobates (AIZIU 1726), and Papio (AIZIU PAL 109). Iliac blade posterosuperior margin (a), anterosuperior margin (b), anteroinferior margin (c), and supraacetabular area (d) are shown. Because specimens are not reproduced to scale, the sizes of the trabecular mesh are not directly comparable.