What is the bone that forms the superior border of the bony pelvis

I do know the bones I think here are them Structure of the Pelvic Girdle. The bony pelvis consists of the two hip bones (also known as innominate or pelvic bones), sacrum and coccyx. There are four articulations within the pelvis: Sacroiliac Joints (x2) – Between the ilium of the hip bones, and the sacrum.

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