Several autapomorphies of "Prestosuchus" relate to the pelvis (hip). These traits are present in "P. chiniquensis" and "P. nyassicus" ("Stagonosuchus"), but notably absent in ""P." loricatus", which is likely a different genus. The ilium has a deep bony acetabulum roofed by a horizontal supraacetabular crest. Unlike other loricatans, there is no vertical crest above the acetabular region. The postacetabular portion of the ilium has a distinctively concave upper edge and is markedly longer than the preacetabular portion. The pubis is straight, with a small contribution to the acetabulum above the obturator foramen. The tip of the shaft expands into a knob-like pubic boot like other loricatans, though it is much smaller than that of relatives such as "Saurosuchus" and "Postosuchus".