part of part of Homo sapiens innominate bone iliac tuberosity of ilium of os coxa 2026-03-19T00:00:00Z A skeletal element projection forming a roughened elevation on the posterior part of the medial surface of the ilium of the os coxa (innominate bone), located superior and posterior to the auricular surface, providing attachment for the posterior sacroiliac ligaments and the erector spinae. skeletal element projection David Osumi-Sutherland