Sloth lemurs are extinct lemurs from Madagascar. They appear to have been adapted to eat a diet of leaves, nuts, and fruit. It is thought that they were slow climbers that clambered about in trees using long arms to grasp branches. Some species, such as those in genus Palaeopropithecus and the species Mesopropithecus dolichobrachion appear to have adaptations for hanging upside-down under branches like modern sloths. The rest of them were still probably good hangers, and may have hung upside down by their feet or arms to reach lower branches, for example. They went extinct some time after humans arrived in Madagascar, at about 350 BCE.