Lemur

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Lemurs

<tr><td>Kingdom:<td>Animalia <tr><td>Phylum:<td>Chordata <tr><td>Class:<td>Mammalia <tr><td>Order:<td>Primates <tr><td>Suborder:<td>Strepsirrhini <tr><td>Infraorder:<td>Lemuriformes </table> <tr><th bgcolor=pink>Families <tr><td> Cheirogaleidae
Lemuridae
Megaladapidae
Indridae </table> Lemurs are part of a class of primates known as prosimians, and make up the infraorder Lemuriformes. These animals are the evolutionary predecessors of monkeys and apes (simians). The term "lemur" is derived from the Latin word lemures, which means "spirits of the night". This likely refers to many lemurs' nocturnal behavior and their large, reflective eyes. It is generically used for four families of prosimians:

Cheirogaleidae, the mouse-lemurs and dwarf lemurs
Lemuridae, common lemurs
Megaladapidae, sportive lemurs
Indridae, leaping lemurs

Lemurs are found naturally only on the island of Madagascar, and some smaller surrounding islands, including the Comoros (where it is likely they were introduced by humans). While they were displaced in the rest of the world by monkeys, apes, and other primates, the lemurs were safe from competition on Madagascar and differentiated into a number of species. These range in size from about 30 grams to perhaps as large as 200 kilograms. The larger species have all become extinct since humans settled on Madagascar, and since the early 20th century the largest lemurs reach about 7 kilograms. Typically, the smaller lemurs are active at night (nocturnal), while the larger ones are active during the day (diurnal). All lemurs are endangered species, due mainly to habitat destruction (deforestation) and hunting. Although conservation efforts are under way, options are limited because of the lemurs' limited range and because Madagascar is desperately poor. Currently, there are approximately 32 living lemur species. One of the foremost lemur research facilities is the Duke University Primate Center. http://www.duke.edu/web/primate/

Classification

As shown here, the four families of lemurs are split into two superfamilies. The Cheirogaleidae have a pedal structure, similar to the other strepsirrhine families and the haplorrhines, suggesting they split off from the other lemurs first. As such, the Cheirogaleoidea are a sister clade to the Lemuroidea.

ORDER PRIMATES
- Suborder Strepsirrhini: non-tarsier prosimians
  - Infraorder Lemuriformes
    - Superfamily Cheirogaleoidea
      - Family Cheirogaleidae: dwarf and mouse lemurs
    - Superfamily Lemuroidea
      - Family Lemuridae: lemurs
      - Family Megaladapidae: sportive lemurs
      - Family Indridae: woolly lemurs and allies
  - Infraorder Chiromyiformes
  - Infraorder Loriformes
- Suborder Haplorrhini: tarsiers, monkeys and apes