Most are highly arboreal and activity patterns range widely from nocturnal to diurnal to cathemeral. Having diversified over millions of years to fill every ecological niche, diets also vary widely, though fruit, leaves, and insects make up the majority of the diet for most species. Family: Cheirogaleidae Family Cheirogaleidae consists of the mouse lemurs (smallest of all primates), the dwarf lemurs, and the fork-marked lemurs and their allies. There are 37 extant species. Family: Lemuridae Family Lemuridae consists of the ring-tailed lemur, the brown lemurs, the bamboo lemurs and the ruffed lemurs. There are 21 extant species and six subspecies. Family: Lepilemuridae Family Lepilemuridae consists solely of the sportive lemurs. As of 2014, there are 26 extant species. Family: Indriidae Family Indriidae consists of the indri (the largest extant lemur), the woolly lemurs and the sifakas. There are 19 extant species. Family: Daubentoniidae Family Daubentoniidae contains only one surviving species, of the aye-aye. Wide-ranging genetic studies have shown that it separated from the ancestral lemurs long before any other branch of the modern Lemuriformes. Unconfirmed species Reports of new species continue to trickle in from the field. However, these reports require further scientific evaluation before their claims can be verified. Extinct species All known extinct lemurs from Madagascar are known from recent, subfossil remains. Conditions for fossilization were not ideal on the island, so little is known about ancestral lemur populations. All known extinct lemurs are thought to have died out after the arrival of humans. See also List of mammals of Madagascar List of primates Footnotes In 2008, the red lemur, Eulemur rufus, was split into two species, Eulemur rufus (red lemur) and Eulemur rufifrons (red-fronted lemur). Also, Eulemur rufus was previously known as the red-fronted lemur, but was renamed the red lemur, while Eulemur rufifrons assumed its former name. Formerly referred to as Eulemur albocollaris or white-collared brown lemur, but was changed in 2008. This extinction date for Babakotia radofilai is based on a single radiocarbon date from one specimen. For this reason, it is hard to tell when this species became extinct or how it is related to other lemur species. Average weights reported for this species are based on very small sample sizes or are general ranges for its genus and thus require further research. Notes References External links Too Many New Lemur Species? – Interview with Anne Yoder, Director of the Duke Lemur Center '