the family, with a body weight of about 6 kg, has only a vestigial tail, whereas most other arboreal leaping primates use their tails to assist in controlling body position during a leap.
The Family Lemuridae is divided into three subfamilies: the Subfamily Cheirogaleinae, which includes the mouse lemurs, the Coquerel's mouse lemur, the dwarf lemurs, the forked lemurs and the hairy-eared dwarf lemurs; the Subfamily Lemurinae, which includes the genera Lemur, Varecia, Hapalemur, and Eulemur, which are the best known Madagascar lemurs (Primates, 2004). Ring-tailed lemurs (lemur catta) are the most terrestrial. Hapalemur are vertical clingers and leapers who climb quadrupedally. The Subfamily Lelilemurinae has only one species, the weasel lemur, Lepilemur mustelinus, or sportive lemur. Their locomotion emphasizes arboreal vertical clinging and leaping, and bipedal hopping on the ground.
The Infraorder Tarsiformes came into existence in the Eocene epoch about 53 million years ago. The Tarsiformes are represented by a single genus, Tarsius (Primates, 2004). Tarsiers are small (body weight slightly over 100 g) vertical clinging and leaping primates in the shrub and forest understory in the Philippines, Borneo and Sumatra. The Tarsiers have a unique combination of prosimian and arthropoid traits. They have a non-opposable thumb, fusion of the tibia and fibula
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