In this species the central, aponeurotic portion of the m. iliotibialis is absent.
In one leg, the posterior edge of the origin is aponeurotic.
Anterior to the acetabulum the origin is aponeurotic, and the edge of this aponeurosis passes over the proximal end of the femur.
In one leg (Fig. 20H), the posteroproximal corner of the muscle is aponeurotic.
The origin is aponeurotic in the preacetabular region but fleshy in the postacetabular region.
The distal part of the muscle is aponeurotic and joins with the femorotibialis muscles in the formation of the patellar tendon.
aponeurosis ap·o·neu·ro·sis (āp'ə-nu-rō'sĭs, -nyu-)
A sheetlike fibrous membrane resembling a flattened tendon that serves as a fascia to bind muscles together or to connect muscle to bone.