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northern muriqui
The northern muriqui (''Brachyteles hypoxanthus'') is an endangered muriqui (woolly spider monkey) species endemic to Brazil. It is unusual among primates in that it shows egaliterian social relationships.〔 It is found in the Atlantic Forest region of the Brazilian states of Rio de Janeiro, Espírito Santo, Minas Gerais and Bahia. Muriquis are the largest species of New World monkeys. The northern muriqui can grow up to 4.3 ft tall. It feeds mainly on leaves and twigs, but will also eat fruit. It often hangs upside-down by its prehensile tail while eating.
==Identification==
Northern muriquis can be individually recognized by their natural markings and facial features, such as fur color and patterning, ear shape, and face shape and pigmentation. Their sex can usually be determined within a week or so of birth, based on the shape and positioning of their genitalia.〔Strier, Karen B, Jean P. Boubli, Carla B Possamai, and Se ́ rgio L. Mendes4. "Population Demography of Northern Muriquis (Brachyteles Hypoxanthus) at the Estac ̧ a ̃ O Biolo ́ Gica De Caratinga/Reserva Particular Do Patrimoˆ Nio Natural-Felı`ciano Miguel Abdala, Minas Gerais, Brazil."AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY (2006): 1-3.〕 Female muriquis are more independent than males; they leave their natal groups at an age of about six years.〔Strier, KB, SL Mendes, and K. "Web of Knowledge ()." Genetic Diversity and Population History of a Critically Endangered Primate, the Northern Muriqui 17.2 (2011): 53-69. Web.〕 Female muriquis engage in sex with multiple partners, which may serve to confuse paternity, limit male aggression, or improve odds of fertilization.〔Possami, Carla. "Socio-Sexual Behavior of Female Northern Muriquis." Socio-Sexual Behavior of Female Northern Muriquis 69.7 (2007). Web.〕 Male muriquis have almost no interaction with infants. When there is an interaction between the two, the infant would be the one to initiate it.〔Oliveria Guimaraes, Vanessa. "Adult Male-infant Interactions in Wild Muriquis (Brachyteles Arachnoides Hypoxanthus)." N.p., Oct. 2001. Web. 26 Oct. 2012.〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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