Old World monkey is the common English name for a

family Family (from la, familia) is a group of people related either by consanguinity (by recognized birth) or affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its members and of society. Idea ...

primate Primates are a diverse order of mammals. They are divided into the strepsirrhines, which include the lemurs, galagos, and lorisids, and the haplorhines, which include the tarsiers and the simians ( monkeys and apes, the latter including ...

s known taxonomically as the Cercopithecidae (). Twenty-four genera and 138

species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s ...

are recognized, making it the largest primate family. Old World monkey genera include

baboon Baboons are primates comprising the genus ''Papio'', one of the 23 genera of Old World monkeys. There are six species of baboon: the hamadryas baboon, the Guinea baboon, the olive baboon, the yellow baboon, the Kinda baboon and the chacma ...

s (genus '' Papio''), red colobus (genus '' Piliocolobus'') and macaques (genus '' Macaca''). Common names for other Old World monkeys include the

talapoin __NOTOC__ Talapoins () are the two species of Old World monkeys classified in genus ''Miopithecus''. They live in central Africa, with their range extending from Cameroon and the Democratic Republic of the Congo to Angola. With a typical length ...

guenon The guenons (, ) are Old World monkeys of the genus ''Cercopithecus'' (). Not all members of this genus have the word "guenon" in their common names; also, because of changes in scientific classification, some monkeys in other genera may have co ...

colobus Black-and-white colobuses (or colobi) are Old World monkeys of the genus ''Colobus'', native to Africa. They are closely related to the red colobus monkeys of genus '' Piliocolobus''. There are five species of this monkey, and at least eight subs ...

douc The doucs or douc langurs make up the genus ''Pygathrix''. They are colobine Old World monkeys, native to Southeast Asia, which consists of these 3 species: red-shanked douc, black-shanked douc, and gray-shanked douc. Description The doucs ...

(douc langur, genus '' Pygathrix''),

vervet The vervet monkey (''Chlorocebus pygerythrus''), or simply vervet, is an Old World monkey of the family Cercopithecidae native to Africa. The term "vervet" is also used to refer to all the members of the genus ''Chlorocebus''. The five distinct ...

gelada The gelada (''Theropithecus gelada'', am, ጭላዳ, translit=č̣əlada), sometimes called the bleeding-heart monkey or the gelada baboon, is a species of Old World monkey found only in the Ethiopian Highlands, living at elevations of above se ...

mangabey Mangabeys are West-African Old World monkeys, with species in three of the six genera of tribe Papionini. The more typical representatives of ''Cercocebus'', also known as the white-eyelid mangabeys, are characterized by their bare, upper eye-l ...

(a group of genera), langur, mandrill, surili (''

Presbytis The surilis are a group of Old World monkeys in the genus ''Presbytis''. They live in the Thai-Malay Peninsula, on Sumatra, Borneo, Java and smaller nearby islands. Besides surili, the common names for the monkeys in the genus also sometimes use ...

''),

patas The common patas monkey (''Erythrocebus patas''), also known as the wadi monkey or hussar monkey, is a ground-dwelling monkey distributed over semi-arid areas of West Africa, and into East Africa. Taxonomy There is some confusion surrounding ...

, and proboscis monkey. Phylogenetically, they are more closely related to

ape Apes (collectively Hominoidea ) are a clade of Old World simians native to sub-Saharan Africa and Southeast Asia (though they were more widespread in Africa, most of Asia, and as well as Europe in prehistory), which together with its sister g ...

s than to

New World monkey New World monkeys are the five families of primates that are found in the tropical regions of Mexico, Central and South America: Callitrichidae, Cebidae, Aotidae, Pitheciidae, and Atelidae. The five families are ranked together as the Ceboidea ...

s. They diverged from a common ancestor of New World monkeys around 45 to 55 million years ago. The smallest Old World monkey is the talapoin, with a head and body 34–37 cm in length, and weighing between 0.7 and 1.3 kg. The largest is the male mandrill, around 70 cm in length, and weighing up to 50 kg. Old World monkeys have a variety of facial features; some have snouts, some are flat nosed, and many exhibit coloration. Most have tails, but they are not prehensile. Old World monkeys are native to Africa and Asia today, inhabiting numerous environments: tropical

rain forest Rainforests are characterized by a closed and continuous tree canopy, moisture-dependent vegetation, the presence of epiphytes and lianas and the absence of wildfire. Rainforest can be classified as tropical rainforest or temperate rainforest ...

savanna A savanna or savannah is a mixed woodland- grassland (i.e. grassy woodland) ecosystem characterised by the trees being sufficiently widely spaced so that the canopy does not close. The open canopy allows sufficient light to reach the ground to ...

s, shrublands, and mountainous terrain. They inhabited much of Europe in the past; today, the only survivors in Europe are the Barbary macaques of

Gibraltar ) , anthem = " God Save the King" , song = " Gibraltar Anthem" , image_map = Gibraltar location in Europe.svg , map_alt = Location of Gibraltar in Europe , map_caption = United Kingdom shown in pale green , mapsize = , image_map2 = Gib ...

. Whether they are native to Gibraltar or were brought by humans is unknown. Some Old World monkeys are

arboreal Arboreal locomotion is the locomotion of animals in trees. In habitats in which trees are present, animals have evolved to move in them. Some animals may scale trees only occasionally, but others are exclusively arboreal. The habitats pose nu ...

, such as the

monkeys; others are

terrestrial Terrestrial refers to things related to land or the planet Earth. Terrestrial may also refer to: * Terrestrial animal, an animal that lives on land opposed to living in water, or sometimes an animal that lives on or near the ground, as opposed to ...

, such as the baboons. Most are at least partially

omnivorous An omnivore () is an animal that has the ability to eat and survive on both plant and animal matter. Obtaining energy and nutrients from plant and animal matter, omnivores digest carbohydrates, protein, fat, and fiber, and metabolize the nut ...

, but all prefer plant matter, which forms the bulk of their diets. Most are highly opportunistic, primarily eating fruit, but also consuming almost any food items available, such as flowers, leaves, bulbs and rhizomes, insects, snails, small mammals, and garbage and handouts from humans.

Taxonomic classification and phylogeny

Two subfamilies are recognized, the Cercopithecinae, which are mainly African, but include the diverse

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial nom ...

of macaques, which are Asian and North African, and the

Colobinae The Colobinae or leaf-eating monkeys are a subfamily of the Old World monkey family that includes 61 species in 11 genera, including the black-and-white colobus, the large-nosed proboscis monkey, and the gray langurs. Some classifications s ...

, which includes most of the Asian genera, but also the African colobus monkeys. The Linnaean classification beginning with the superfamily is: * Superfamily Cercopithecoidea ** Family Cercopithecidae: Old World monkeys *** Subfamily Cercopithecinae **** Tribe Cercopithecini ***** Genus '' Allenopithecus'' – Allen's swamp monkey ***** Genus '' Miopithecus'' – talapoins ***** Genus '' Erythrocebus'' – patas monkeys ***** Genus '' Chlorocebus'' ***** Genus ''

Cercopithecus The guenons (, ) are Old World monkeys of the genus ''Cercopithecus'' (). Not all members of this genus have the word "guenon" in their common names; also, because of changes in scientific classification, some monkeys in other genera may have ...

'' – guenons ***** Genus ''

Allochrocebus ''Allochrocebus'' is a primate genus including the terrestrial guenons: the L'Hoest's monkey, the Preuss's monkey, and the sun-tailed monkey. Taxonomy & systematics Formerly included in genus ''Cercopithecus'', the three species of terrestrial g ...

'' – terrestrial guenons **** Tribe

Papionini Papionini is a tribe of Old World monkeys that includes several large monkey species, which include the macaques of North Africa and Asia, as well as the baboons, geladas, mangabeys, kipunji, drills, and mandrills, which are essentially from sub- ...

***** Genus '' Macaca'' – macaques ***** Genus ''

Lophocebus 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 ...

'' – crested mangabeys ***** Genus ''

Rungwecebus The kipunji (''Rungwecebus kipunji''), also known as the highland mangabey, is a species of Old World monkey that lives in the highland forests of Tanzania. The kipunji has a unique call, described as a 'honk-bark', which distinguishes it from i ...

'' – kipunji ***** Genus '' Papio'' – baboons ***** Genus '' Theropithecus'' – gelada ***** Genus '' Cercocebus'' – white-eyelid mangabeys ***** Genus ''

Mandrillus ''Mandrillus'' is a genus of large Old World monkeys distributed throughout central and southern Africa, consisting of two species: ''M. sphinx'' and ''M. leucophaeus'', the mandrill and drill, respectively. ''Mandrillus'', originally placed und ...

'' – mandrill and drill *** Subfamily

**** African group ***** Genus ''

Colobus Black-and-white colobuses (or colobi) are Old World monkeys of the genus ''Colobus'', native to Africa. They are closely related to the red colobus monkeys of genus '' Piliocolobus''. There are five species of this monkey, and at least eight subs ...

'' – black-and-white colobuses ***** Genus '' Piliocolobus'' – red colobuses ***** Genus '' Procolobus'' – olive colobus **** Langur (leaf monkey) group ***** Genus ''

Semnopithecus Gray langurs, also called Hanuman langurs and Hanuman monkeys, are Old World monkeys native to the Indian subcontinent constituting the genus ''Semnopithecus''. Traditionally only one species ''Semnopithecus entellus'' was recognized, but since a ...

'' – gray langurs or Hanuman langurs ***** Genus ''

Trachypithecus The lutungs, langurs, or leaf monkeys are a group of Old World monkeys in the genus ''Trachypithecus'' (derived from Greek , meaning "rough" and , meaning "monkey"). Their range is much of Southeast Asia (northeast India, Vietnam, southern Chin ...

'' – lutungs ***** Genus ''

'' – surilis **** Odd-nosed group ***** Genus '' Pygathrix'' – doucs ***** Genus '' Rhinopithecus'' – snub-nosed monkeys ***** Genus '' Nasalis'' – proboscis monkey ***** Genus '' Simias'' – pig-tailed langur The distinction between apes and monkeys is complicated by the traditional paraphyly of monkeys: Apes emerged as a sister group of Old World monkeys in the

catarrhines The parvorder Catarrhini , catarrhine monkeys, Old World anthropoids, or Old World monkeys, consisting of the Cercopithecoidea and apes (Hominoidea). In 1812, Geoffroy grouped those two groups together and established the name Catarrhini, "Old W ...

, which are a sister group of New World monkeys. Therefore,

cladistically Cladistics (; ) is an approach to biological classification in which organisms are categorized in groups ("clades") based on hypotheses of most recent common ancestry. The evidence for hypothesized relationships is typically shared derived char ...

, apes, catarrhines and related contemporary extinct groups, such as

Parapithecidae Parapithecidae is an extinct family of primates which lived in the Eocene and Oligocene periods in Egypt. Eocene fossils from Myanmar are sometimes included in the family in addition. They showed certain similarities in dentition to Condylarthra, ...

, are monkeys as well, for any consistent definition of "monkey". "Old World monkey" may also legitimately be taken to be meant to include all the catarrhines, including apes and extinct species such as ''

Aegyptopithecus ''Aegyptopithecus'' ("Egyptian ape", from Greek ''Αίγυπτος'' "Egypt" and ''πίθηκος'' "ape") is an early fossil catarrhine that predates the divergence between hominoids ( apes) and cercopithecids (Old World monkeys). It is kno ...

'', in which case the apes, Cercopithecoidea and ''Aegyptopithecus'' as well as (under an even more expanded definition) even the Platyrrhini emerged within the Old World monkeys. Historically, monkeys from the "Old World" (Afro-Arabia), somehow drifted to the "New World" some 40 million years ago, forming the "New World monkeys" (platyrrhines). Apes would emerge later within the Afro-Arabia group.

Characteristics

Old World monkeys are medium to large in size, and range from

forms, such as the colobus monkeys, to fully terrestrial forms, such as the baboons. The smallest is the

, with a head and body 34–37 cm in length, and weighing between 0.7 and 1.3 kilograms, while the largest is the male mandrill (the females of the species being significantly smaller), at around 70 cm in length, and weighing up to 50 kilograms. Most Old World monkeys have tails (the family name means "tailed ape"), unlike the tailless apes. The tails of Old World monkeys are not prehensile, unlike those of the

s (platyrrhines). The distinction of catarrhines from platyrrhines depends on the structure of the

rhinarium The rhinarium (New Latin, "belonging to the nose"; plural: rhinaria) is the furless skin surface surrounding the external openings of the nostrils in many mammals. Commonly it is referred to as the tip of the ''snout'', and breeders of cats and ...

, and the distinction of Old World monkeys from apes depends on dentition (the number of teeth is the same in both, but they are shaped differently). In platyrrhines, the nostrils face sideways, while in catarrhines, they face downward. Other distinctions include both a tubular ectotympanic (ear bone), and eight, not twelve, premolars in catarrhines, giving them a

dental formula Dentition pertains to the development of teeth and their arrangement in the mouth. In particular, it is the characteristic arrangement, kind, and number of teeth in a given species at a given age. That is, the number, type, and morpho-physiolog ...

of: Several Old World monkeys have anatomical oddities. For example, the

monkeys have stubs for thumbs to assist with their arboreal movement, the proboscis monkey has an extraordinary nose, while the

snub-nosed monkey __NOTOC__ Snub-nosed monkeys are a group of Old World monkeys and make up the entirety of the genus ''Rhinopithecus''. The genus is rare and not fully researched. Some taxonomists group snub-nosed monkeys together with the genus '' Pygathrix''. S ...

s have almost no nose at all. The

penis A penis (plural ''penises'' or ''penes'' () is the primary sexual organ that male animals use to inseminate females (or hermaphrodites) during copulation. Such organs occur in many animals, both vertebrate and invertebrate, but males d ...

of the male mandrill is red and the

scrotum The scrotum or scrotal sac is an anatomical male reproductive structure located at the base of the penis that consists of a suspended dual-chambered sac of skin and smooth muscle. It is present in most terrestrial male mammals. The scrotum co ...

is lilac; the face is also brightly colored. The coloration is more pronounced in dominant males.Setchell, Joanna M., and Alan F. Dixson.
Developmental variables and dominance rank in adolescent male mandrills (Mandrillus sphinx)
" American Journal of Primatology 56.1 (2002): 9-25.

Habitat and distribution

The Old World monkeys are native to

Africa Africa is the world's second-largest and second-most populous continent, after Asia in both cases. At about 30.3 million km2 (11.7 million square miles) including adjacent islands, it covers 6% of Earth's total surface area ...

and

Asia Asia (, ) is one of the world's most notable geographical regions, which is either considered a continent in its own right or a subcontinent of Eurasia, which shares the continental landmass of Afro-Eurasia with Africa. Asia covers an are ...

today, inhabiting numerous environments: tropical

s, shrublands, and mountainous terrain. They inhabited much of

Europe Europe is a large peninsula conventionally considered a continent in its own right because of its great physical size and the weight of its history and traditions. Europe is also considered a subcontinent of Eurasia and it is located entirel ...

during the Neogene period; today the only survivors in Europe are the Barbary macaques of

Behaviour and ecology

Diet

Most Old World monkeys are at least partially

, but all prefer plant matter, which forms the bulk of their diet. Leaf monkeys are the most vegetarian, subsisting primarily on leaves, and eating only a small number of insects, while the other species are highly opportunistic, primarily eating fruit, but also consuming almost any food items available, such as flowers, leaves, bulbs and rhizomes, insects, snails, and even small vertebrates. The Barbary macaque's diet consists mostly of leaves and roots, though it will also eat insects and uses cedar trees as a water source.Ciani, Andrea Camperio, Loredana Martinoli, Claudio Capiluppi, Mohamed Arahou, and Mohamed Mouna. "Effects of Water Availability and Habitat Quality on Bark-Stripping Behavior in Barbary Macaques." Conservation Biology 15.1 (n.d.): 259-65. JSTOR. Web. 14 Nov. 2012.

Reproduction

Gestation in the Old World monkeys lasts between five and seven months. Births are usually single, although, as with humans, twins occur occasionally. The young are born relatively well-developed, and are able to cling onto their mother's fur with their hands from birth. Compared with most other mammals, they take a long time to reach sexual maturity, with four to six years being typical of most species.

Social systems

In most species, daughters remain with their mothers for life, so that the basic social group among Old World monkeys is a

matrilineal Matrilineality is the tracing of kinship through the female line. It may also correlate with a social system in which each person is identified with their matriline – their mother's lineage – and which can involve the inheritance ...

troop. Males leave the group on reaching adolescence, and find a new troop to join. In many species, only a single adult male lives with each group, driving off all rivals, but others are more tolerant, establishing hierarchical relationships between dominant and subordinate males. Group sizes are highly variable, even within species, depending on the availability of food and other resources.

References

External links

* * {{Authority control Old World monkeys Extant Oligocene first appearances