Context: The crested mangabeys are West - African Old World monkeys belonging to the genus Lophocebus . They tend to have dark skin , eyelids that match their facial skin , and crests of hair on their heads . Another genus of mangabeys , Cercocebus , was once thought to be very closely related , so much so that all the species were placed in one genus . However , it is now understood that Lophocebus species are more closely related to the baboons in genus Papio , while the Cercocebus species are more closely related to the mandrill . In 2006 , the highland mangabey was moved from Lophocebus to a new genus , Rungwecebus ., Binomial nomenclature (also called binominal nomenclature or binary nomenclature) is a formal system of naming species of living things by giving each a name composed of two parts, both of which use Latin grammatical forms, although they can be based on words from other languages. Such a name is called a binomial name (which may be shortened to just "binomial"), a binomen or a scientific name; more informally it is also called a Latin name. The first part of the name identifies the genus to which the species belongs; the second part identifies the species within the genus. For example, humans belong to the genus "Homo" and within this genus to the species "Homo sapiens". The "formal" introduction of this system of naming species is credited to Carl Linnaeus, effectively beginning with his work "Species Plantarum" in 1753. But Gaspard Bauhin, in as early as 1623, had introduced in his book "Pinax theatri botanici" (English, "Illustrated exposition of plants") many names of genera that were later adopted by Linnaeus., Gabon, officially the Gabonese Republic, is a sovereign state on the west coast of Central Africa. Located on the equator, Gabon is bordered by Equatorial Guinea to the northwest, Cameroon to the north, the Republic of the Congo on the east and south, and the Gulf of Guinea to the west. It has an area of nearly and its population is estimated at 1.5 million people. Its capital and largest city is Libreville., Tropical rainforests occur in areas of tropical rainforest climate in which there is no dry season  all months have an average precipitation of at least 60 mm  and may also be referred to as "lowland equatorial evergreen rainforest". They rarely extend more than 10 degrees north or south of the equator and are a sub-set of the tropical forest biome type that occurs roughly within the 28 degree latitudes (in the equatorial zone between the Tropic of Cancer and Tropic of Capricorn). Within the World Wildlife Fund's biome classification, tropical rainforests are a type of tropical moist broadleaf forest (or tropical wet forest) that also includes tropical seasonal forests., Equatorial Guinea, officially the Republic of Equatorial Guinea, is a country located in Central Africa, with an area of . Formerly the colony of Spanish Guinea, its post-independence name evokes its location near both the Equator and the Gulf of Guinea. Equatorial Guinea is the only sovereign African state in which Spanish is an official language. , the country has an estimated population of over 1.2 million., In biology, an organism is any contiguous living system, such as an animal, plant, fungus, archaeon, or bacterium. All known types of organisms are capable of some degree of response to stimuli, reproduction, growth and development and homeostasis. An organism consists of one or more cells; when it has one cell it is known as a unicellular organism; and when it has more than one it is known as a multicellular organism. Most unicellular organisms are of microscopic scale and are thus loosely described as microorganisms. Humans are multicellular organisms composed of many trillions of cells grouped into specialized tissues and organs., Baboons are African and Arabian Old World monkeys belonging to the genus Papio, part of the subfamily Cercopithecinae. The five species are some of the largest non-hominoid members of the primate order; only the mandrill and the drill are larger. Previously, the closely related gelada (genus "Theropithecus") and the two species (mandrill and drill) of genus "Mandrillus" were grouped in the same genus, and these Old World monkeys are still often referred to as baboons in everyday speech. They range in size and weight depending on species. The Guinea baboon is and weighs only , while the largest chacma baboon can be and weigh ., Mandrillus is the genus of the mandrill and its close relative the drill. These two species are closely related to the baboons, and until recently were lumped together as a single species of baboon. Both "Mandrillus" species have long furrows on either side of their elongated snouts. The adult male mandrill's furrows are blue, while the furrows of the drill are black. Both species are terrestrial, living on the ground of the rainforests and occasionally grasslands of Central Africa., A primate is a mammal of the order Primates (Latin: "prime, first rank"). In taxonomy, primates include two distinct lineages, strepsirrhines and haplorhines. Primates arose from ancestors that lived in the trees of tropical forests; many primate characteristics represent adaptations to life in this challenging three-dimensional environment. Most primate species remain at least partly arboreal., The term mangabey can refer to three different genera of Old World monkeys. "Lophocebus" and "Cercocebus" were once thought to be very closely related, so much so that all the species were in one genus. However, it is now understood that the species within genus "Lophocebus" are more closely related to the baboons in genus "Papio", while the species within genus "Cercocebus" are more closely related to the Mandrill. The single species in "Rungwecebus" was discovered recently., A genus ( genera) is a taxonomic rank used in the biological classification of living and fossil organisms in biology. In the hierarchy of biological classification, genus comes above species and below family. In binomial nomenclature, the genus name forms the first part of the binomial species name for each species within the genus., In botany, a fruit is the seed-bearing structure in flowering plants (also known as angiosperms) formed from the ovary after flowering., The mandrill ("Mandrillus sphinx") is a primate of the Old World monkey (Cercopithecidae) family. It is one of two species assigned to the genus "Mandrillus," along with the drill. Both the mandrill and the drill were once classified as baboons in the genus "Papio", but they now have their own genus, "Mandrillus". Although they look superficially like baboons, they are more closely related to "Cerocebus" mangabeys. Mandrills are found in southern Cameroon, Gabon, Equatorial Guinea, and Congo. Mandrills mostly live in tropical rainforests. They live in very large groups. Mandrills have an omnivorous diet consisting mostly of fruits and insects. Their mating season peaks in July to September, with a corresponding birth peak in December to April., The Old World monkeys or Cercopithecidae are a family of primates, the only family in the superfamily Cercopithecoidea in the clade (or parvorder) of Catarrhini., Subject: crested mangabey, Relation: parent_taxon, Options: (A) angiosperms (B) animal (C) area (D) areas (E) baboon (F) cancer (G) cercopithecinae (H) cercopithecoidea (I) drill (J) homo (K) insects (L) lophocebus (M) mammal (N) mandrillus (O) old world monkey (P) primates (Q) sphinx
Output: cercopithecinae