kimerajamm
Joined: 28 Nov 2010
Posts: 785
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 Posted: Mon Apr 25, 2011 11:18 am Post subject: million years |
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Until recently, giant lemurs existed on Madagascar. Although they are only represented by subfossil remains, they were modern forms, having adaptations unlike those seen in lemurs today, and are counted as part of the rich lemur diversity that has evolved in isolation for up to 60 million years.[1] All 17 extinct lemurs were larger than the extant forms, including the largest living lemurs, the indri (Indri indri) and diademed sifaka (Propithecus diadema), which weigh up to 9.5 kg (21 lb).[2] The estimated weights for the subfossil lemurs have varied. Techniques used for these weight estimations include the comparison of skull lengths, tooth size, the head diameter of the femur, and more recently, the area of cortical bone (hard bone) in long bones (such as the humerus).[3] Despite the variations in the size estimates for some species, all subfossil lemurs were larger than living species, weighing 10 kg (22 lb) or more, and one species may have weighed as much as 200 kg (440 lb).[4][5]
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