[71], The lemur dentition is heterodont (having multiple tooth morphologies) and derives from an ancestral primate permanent dentition of 2.1.3.32.1.3.3. [70], Crypsis, or the inability of humans to visually distinguish between two or more distinct species, has recently been discovered among lemurs, particularly within the sportive lemurs (Lepilemur) and mouse lemurs (Microcebus). [60], The aye-aye is almost universally viewed unfavorably across Madagascar,[80] though the tales vary from village to village and region to region. In sifakas, these ritualized combats involve staring, growling, scent-marking, and leaping to occupy certain sections of the tree.

Other areas, such as the dry forests and spiny forests of the west and south, receive little protection and are in serious danger of being destroyed. As of 2014, there are 26 extant species. However, these reports require further scientific evaluation before their claims can be verified. [101] The following year, a new hypothesis was proposed to explain monomorphism, stating that because most female lemurs are only sexually receptive for a day or two each year, males can utilize a more passive form of mate guarding: copulatory plugs, which block the female reproductive tract, preventing other males from successfully mating with her, and thus reducing the need for aggression and the evolutionary drive for sexual dimorphism.

The degree of socialization varies by species, gender, location, and season. [130] The aye-aye also has a large brain-to-body ratio, which may indicate a higher level of intelligence. For example, although the hunting and eating of certain species may be taboo, other species may not share that same protection and are therefore targeted instead.

[84], Lemurs have traditionally been regarded as being less intelligent than anthropoid primates,[128] with monkeys and apes often described as having more cunning, guile, and deceptiveness.

[87] Furthermore, the rod-to-cone cell ratio can be variable even among diurnal species. [15][31][87] Since the riboflavins in the tapetum have a tendency to dissolve and vanish when processed for histological investigation, however, the exceptions are still debatable.

[163], There are also widespread fady about indri and sifakas. [49] At least 36 genera from 23 families of plants are targeted by lemur seed predators. [80], One example of lemur fady told around 1970 comes from Ambatofinandrahana in the Fianarantsoa Province. [50] The toothcomb is kept clean by the sublingua or "under-tongue", a specialized structure that acts like a toothbrush to remove hair and other debris.

[29][93][108], Other lemurs that do not exhibit dormancy conserve energy by selecting thermoregulated microhabitats (such as tree holes), sharing nests, and reducing exposed body surfaces, such as by hunched sitting and group huddling.



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