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en.wikipedia.org/wiki/Intermembral_index

The intermembral index is a ratio used to compare limb proportions, expressed as a percentage. It is equal to the length of forelimbs (humerus plus radius) divided by the length of the hind limbs (femur plus tibia) multiplied by 100, otherwise written mathematically as: (+) (+) ×The intermembral index is used frequently in primatology, since it helps predict primate locomotor patterns.

www.britannica.com/science/intermembral-index

Other articles where Intermembral index is discussed: primate: Four types of locomotion: …being strictly quantitative, is the intermembral index. Briefly, the index is a ratio expressed as percentage of arm length to leg length; an index over 100 indicates relatively long arms. This provides a model by means of which the locomotion of an early primate can be inferred by determination of…

prezi.com/ilck1q_uitdd/primate-intermembral-index

Intermembral Index =82 semi-terrestrial and semi-arboreal omnivourous long legs + long arms=quadrupedal walking Indri Lemur Intermembral Index=65.2 powerful legs 1/3rd longer than arms arboreal Intermembral index = 84 Branchite omnivorous Weeping Capuchin Vervet Monkey Siamang

www.britannica.com/animal/primate-mammal/Locomotion

When the subject of primate arboreal locomotion is studied in evolutionary terms by using fossils, it becomes clear that locomotor categories are not discrete but constitute a continuum of change from a hind limb-dominated gait to a forelimb-dominated one. The best single indicator of gait, one that has the added advantage of being strictly quantitative, is the intermembral index.

boneclones.com/category/non-human-primate-intermembral-sets/non-human-primates

The intermembral index is a useful tool in understanding the locomotor activities of a given primate. The indices are determined by the humerus, radius, femur and tibia. A low index indicates a primate with longer hind limbs, more prone to bipedal activities, while a high index signifies longer fore arms and thus more prone to quadrupedal activities.

www.sciencedirect.com/.../intermembral-index

The humeroradial index (94.6%) is only slightly less than that of the lion (98.3%) and the cheetah (103.3%), while the femorotibial index (105%) matches that of the cheetah, indicating longer lower limbs for a longer stride and potentially higher running speeds. The intermembral index is only 84.7% and falls within values for other large cats ...

www.reference.com/pets-animals/intermembral-index-chimpanzees-f3d180e9152d6724

The intermembral index for a chimpanzee is 106 to the 12th degree whereas the intermembral index for a human is 88 to the 11th degree. The intermembral index is a ratio of limb proportions that provides insight into the type of locomotion of an animal.

quizlet.com/15451931/anthropology-2200-flash-cards

- intermembral index of 70 - used by: prosimians. Arboreal Quadrupedalism ... - many old world monkeys, a few new world monkeys, chimps, bonobos - low sexual dimorphism. all male groups ... Anthropology 2200 OSU Exam 2 40 terms. mlisbon728. Primates 39 terms. dimitri_alexander6.

quizlet.com/54205636/locomotion-flash-cards

primate locomotion. Primates are an arboreal radiation. However, there is a great deal of variation in their locomotion patterns. Five categories of primate locomotion are typically recognized : -arboreal quadrapedalism - terrestrial quadrupedalism - vertical clinging and leaping - suspensory - bipedalism ... intermembral index= measure of the ...

ana215primates.weebly.com/old-and-new-world-monkeys.html

Distribution: The colobus monkey is widely distributed throughout Africa including Senegal, Ethiopia, Angola, Zaire, Tazania and Malawi (Napier and Napier 1985). Tail: Yes. Mode of locomotion: These monkeys are arboreal quadrapeds, and have an intermembral index of 79. On occasion they may semi-brachiate through the trees, which is not seen in the cercopithecine family.