Lemurs are
strepsirrhine primates, all species of which are
endemic to
Madagascar. They include the smallest primate in the world,
Madame Berthe's mouse lemur, which weighs , and range up to the size of the
indri, which can weigh as much as . However, recently extinct species grew much larger. As of 2010, five
families, 15
genera, and 101
species and
subspecies of
lemur were formally recognized. Of the 101 species and subspecies, the
International Union for Conservation of Nature (IUCN)
classified eight as Critically Endangered, 18 as Endangered, 15 as Vulnerable, four as Near Threatened, eight as Least Concern and 41 as Data Deficient; seven were yet to be evaluated. From 2000 through 2008, 39 new species were described and nine other taxa resurrected. By 2014, the number of species and subspecies recognized had increased to 105; of these, the IUCN classified 24 as Critically Endangered, 49 as Endangered, 20 as Vulnerable, three as Near Threatened, three as Least Concern and four as Data Deficient; two were yet to be evaluated.