obturator crest obturator crest the anterior border of the superior pubic ramus presents a sharp margin, the obturator crest, which forms part of the circumference of the obturator foramen superiorly and affords attachment to the obturator membrane. obturator crestthe obturator membrane.right hip bone. external surface.detailsidentifierslatincrista obturatoriata98a02.5.01.309ta21354fma16976anatomical terms of bone the obturator crest extends from the pubic tubercle to the acetabular notch. bones of the pelvisgeneral sacrum coccyx hip bone iliumbody arcuate line winggluteal lines posterior anterior inferior iliac spines anterior superior anterior inferior posterior superior posterior inferior other: crest tuberosity tubercle fossa ischiumbody ischial spine lesser sciatic notch superior ramus tuberosity of the ischium inferior ramus no substructures pubis body pubic crest superior ramus pubic tubercle obturator crest inferior ramus pectineal line compound acetabulum acetabular notch iliopubic eminence / iliopectineal line linea terminalis ischiopubic ramus / pubic arch foramina obturator foramen greater sciatic foramen / greater sciatic notch lesser sciatic foramen landmarks pelvic inlet pelvic brim pelvic outlet authority control terminologia anatomica