ischial callosities
Primate rump cushions
Ischial callosities are the tough, often brightly colored sitting pads found on the buttocks of Old World monkeys and apes like baboons and macaques.
These hardened patches of skin cover the ischium—the bone you sit on—and allow the animal to rest comfortably on branches or rough surfaces for extended periods.
- buttocksFleshy seat area
- macaquesMedium-sized Old World primates
- baboonsLarge Old World monkeys
- primatesOrder of higher mammals
- callusesThickened protective skin areas
Old World monkeys · monkeys · cushion · sitting · hominoids · pad · butts · swellings · pelves · posteriors · terrestrial · haunches · mandrill · arboreal · mating · ape · grooming · swollen