Gluteofemoralis muscle

The gluteofemoral muscle is situated at the caudal border of the superficial gluteal muscle and can extend under the cranial border of the biceps femoral until the proximal part of the leg. It is absent in Dogs and in Men but constant and well developed in Cats. It reaches an extreme development in Rabbits and Ungulates where in which it unites to the biceps femoral muscle and constitutes a particular entity with it: the gluteobiceps muscle. 

Origin: -In Cats, on the first coccygean vertebrae;

-in Rabbits, this inseertion extends on the adjacent part of the median sacral crest.

-in Ungulates, the coccygean attach becomes accessory, as the insertions extend largely on the mdeian sacral crest, the dorsal sacroiliac ligament and a part of the sacrosciatic ligament.

Insertion: -In Cats, the terminal tendon ends on the lateral border of the patella.

-Same thing in Rabbits and Ungulates, where the patellar insertion, very powerful, is continued on the lateral patellar ligament.

Functions: extension and abduction of the femur.

In great Ungulates, it extends and abduct the femur when the leg is hanging, but when it is in support, the traction induced on the femorotibial joint causes its opening, and therfore the extension of the leg and the general propulsion.