Gluteofemoralis muscle

The gluteofemoralis muscle is situated on the caudal border of the superficial gluteal muscle and can extend under the cranial border of the biceps femoris 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 it unites to the biceps femoris muscle and forms a distinct muscular unit with it: the gluteobiceps muscle. 

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

Insertions:

-in Rabbits, this insertion extends on the adjacent part of the median sacral crest;

-in Ungulates, the coccygeal attach becomes accessory, as the insertions extend largely on the median sacral crest, the dorsal sacroiliac ligament and a part of the sacrosciatic ligament;

-In Cats, the terminal tendon ends on the lateral border of the patella;

-In Rabbits and Ungulates, the terminal tendon, which is very strong, likewise inserts on the lateral patellar ligament;

Functions: extension and abduction of the femur.

In large ungulates, it extends and abduct the femur when the limb is hanging, but when it is in support, the traction induced on the femorotibial joint causes its extension, and therefore the extension of the leg and the general propulsion.