kimerajamm
Joined: 28 Nov 2010 Posts: 785
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Posted: Mon Apr 25, 2011 11:28 am Post subject: Due to the size |
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Their skeletons suggest that most subfossil lemurs were tree-dwellers, adapted for living in forests and possibly limited to such habitats.[4][8][9] Unlike some of the living species, the subfossil lemurs lacked adaptations for leaping. Instead, suspension, used by some indriids and ruffed lemurs, was extensively used in some lineages. Although living lemurs are known to visit the ground to varying extents, only the extinct archaeolemurids exhibit adaptations for semiterrestrial locomotion. Due to the size of the extinct subfossil lemurs, all were likely to travel on the ground between trees.[8] They had shorter, more robust limbs, heavily built axial skeletons (trunks), and large heads[10] and are thought to have shared the common lemur trait of low basal metabolic rates, making them slow-moving.[9] Studies of their semicircular canals confirm this assumption, showing that koala lemurs moved slower than orangutans, monkey lemurs were less agile than Old World monkeys, and sloth lemurs exhibited slow movements like those of lorises and sloths.[11]
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