[6] It has been suggested that some animals, such as the orangutan and Indian elephant, lack a ligamentum teres.

[7][8] However, the presence of a ligamentum teres, albeit with a morphology different from the human version, has been found upon dissection in both these animals.

In the orangutan, it is believed to play a significant role in preventing dislocation of the femoral head within extreme ranges of motion.

In the Indian elephant, it is the primary support of the hip joint when the hind limbs are abducted.

[9] This article incorporates text in the public domain from page 336 of the 20th edition of Gray's Anatomy (1918)