More primitive than monkeys and apes.  Prosimians comprise the lemurs of Madagascar, the galagos and pottos of Africa, and the Lorises of Asia. Lemurs ( which include Sifaka, the Indri, and the Aye - Aye ) Have large ears, and elongated body, large limbs, and most have a long, bushy tail. Lorises, pottos, and galagos are generally smaller than lemurs and tend to have larger eyes. Prosimians mostly inhabit forest and are usually nocturnal. ( some lemurs are diurnal ). Deforestation as endangered many  Prosimians, especially lemurs.