Old World monkey

The Old World monkeys or Cercopithecidae are a group of primates, falling in the superfamily Cercopithecoidea in the clade Catarrhini. The Old World monkeys are native to Africa and Asia today, inhabiting a range of environments from tropical rain forest to savanna, shrubland and mountainous terrain, and are also known from Europe in the fossil record. However, a (possibly introduced) free-roaming group of monkeys still survives in Gibraltar (Europe) to this day. Old World monkeys include many of the most familiar species of non-human primates such as baboons and macaques.

Characteristics
Old World monkeys are medium to large in size, and range from arboreal forms, such as the colobus monkeys, to fully terrestrial forms, such as the baboons. The smallest is the talapoin, 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.

From the point of view of superficial appearance, Old World monkeys are unlike apes in that most have tails (the family name means "tailed ape"), and unlike the New World monkeys in that their tails are never prehensile. Technically, the distinction of catarrhines from platyrrhines depends on the structure of the nose, 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, whilst in catarrhines, they face downwards. Other distinctions include both a tubular ectotympanic (ear bone), and eight, not twelve, premolars in catarrhines, giving them a dental formula of:

Several Old World monkeys have anatomical oddities. The colobus monkeys have a stub for a thumb to assist with their arboreal movement; the proboscis monkey has an extraordinary nose while the snub-nosed monkeys have almost no nose at all; the penis of the male Mandrill is colored red and the scrotum has a lilac color, while the face also has bright coloration like the genitalia and this develops in only the dominant male of a multi-male group.

Most Old World monkeys are at least partially omnivorous, 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.

Gestation in the Old World monkeys lasts between five and seven months. Births are usually single, although, as with humans, twin births do also occur from time to time. 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.

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

Classification
Two subfamilies are recognized, the Cercopithecinae, which are mainly African but include the diverse genus of macaques which are Asian and North African, and the Colobinae, which includes most of the Asian genera but also the African colobus monkeys.


 * Superfamily Cercopithecoidea
 * Family Cercopithecidae: Old World monkeys
 * Subfamily Cercopithecinae
 * Tribe Cercopithecini
 * Genus Allenopithecus
 * Allen's swamp monkey, Allenopithecus nigroviridis
 * Genus Miopithecus – talapoins
 * Angolan talapoin, Miopithecus talapoin
 * Gabon talapoin, Miopithecus ogouensis
 * Genus Erythrocebus
 * Patas monkey, Erythrocebus patas
 * Genus Chlorocebus
 * Green monkey, Chlorocebus sabaeus
 * Grivet, Chlorocebus aethiops
 * Bale Mountains vervet, Chlorocebus djamdjamensis
 * Tantalus monkey, Chlorocebus tantalus
 * Vervet monkey, Chlorocebus pygerythrus
 * Malbrouck, Chlorocebus cynosuros
 * Genus Cercopithecus – guenons
 * Dryas monkey or Salongo monkey, Cercopithecus dryas
 * Diana monkey, Cercopithecus diana
 * Roloway monkey, Cercopithecus roloway
 * Greater spot-nosed monkey, Cercopithecus nictitans
 * Blue monkey, Cercopithecus mitis
 * Silver monkey, Cercopithecus doggetti
 * Golden monkey, Cercopithecus kandti
 * Sykes's monkey, Cercopithecus albogularis
 * Mona monkey, Cercopithecus mona
 * Campbell's mona monkey, Cercopithecus campbelli
 * Lowe's mona monkey, Cercopithecus lowei
 * Crested mona monkey, Cercopithecus pogonias
 * Wolf's mona monkey, Cercopithecus wolfi
 * Dent's mona monkey, Cercopithecus denti
 * Lesser spot-nosed monkey, Cercopithecus petaurista
 * White-throated guenon, Cercopithecus erythrogaster
 * Sclater's guenon, Cercopithecus sclateri
 * Red-eared guenon, Cercopithecus erythrotis
 * Moustached guenon, Cercopithecus cephus
 * Red-tailed monkey, Cercopithecus ascanius
 * L'Hoest's monkey, Cercopithecus lhoesti
 * Preuss's monkey, Cercopithecus preussi
 * Sun-tailed monkey, Cercopithecus solatus
 * Hamlyn's monkey, Cercopithecus hamlyni
 * De Brazza's monkey, Cercopithecus neglectus
 * Tribe Papionini
 * Genus Macaca – macaques
 * Barbary macaque, Macaca sylvanus
 * Lion-tailed macaque, Macaca silenus
 * Southern pig-tailed macaque or Beruk, Macaca nemestrina
 * Northern pig-tailed macaque, Macaca leonina
 * Pagai island macaque or Bokkoi, Macaca pagensis
 * Siberut macaque, Macaca siberu
 * Moor macaque, Macaca maura
 * Booted macaque, Macaca ochreata
 * Tonkean macaque, Macaca tonkeana
 * Heck's macaque, Macaca hecki
 * Gorontalo macaque, Macaca nigrescens
 * Celebes crested macaque or Black "ape", Macaca nigra
 * Crab-eating macaque or Long-tailed macaque or Kera, Macaca fascicularis
 * Stump-tailed macaque or Bear macaque, Macaca arctoides
 * Rhesus macaque, Macaca mulatta
 * Formosan rock macaque, Macaca cyclopis
 * Japanese macaque, Macaca fuscata
 * Toque macaque, Macaca sinica
 * Bonnet macaque, Macaca radiata
 * Assam macaque, Macaca assamensis
 * Tibetan macaque or Milne-Edwards' macaque, Macaca thibetana
 * Arunachal macaque or Munzala, Macaca munzala
 * Genus Lophocebus – crested mangabeys
 * Grey-cheeked mangabey, Lophocebus albigena
 * Black crested mangabey, Lophocebus aterrimus
 * Opdenbosch's mangabey, Lophocebus opdenboschi
 * Uganda mangabey, Lophocebus ugandae
 * Johnston's mangabey, Lophocebus johnstoni
 * Osman Hill's mangabey, Lophocebus osmani
 * Genus Rungwecebus
 * Kipunji, Rungwecebus kipunji
 * Genus Papio – baboons
 * Hamadryas baboon, Papio hamadryas
 * Guinea baboon, Papio papio
 * Olive baboon, Papio anubis
 * Yellow baboon, Papio cynocephalus
 * Chacma baboon, Papio ursinus
 * Genus Theropithecus
 * Gelada, Theropithecus gelada
 * Genus Cercocebus – white-eyelid mangabeys
 * Sooty mangabey, Cercocebus atys
 * Collared mangabey, Cercocebus torquatus
 * Agile mangabey, Cercocebus agilis
 * Golden-bellied mangabey, Cercocebus chrysogaster
 * Tana River mangabey, Cercocebus galeritus
 * Sanje mangabey, Cercocebus sanjei
 * Genus Mandrillus
 * Mandrill, Mandrillus sphinx
 * Drill, Mandrillus leucophaeus
 * Subfamily Colobinae
 * African group
 * Genus Colobus – black-and-white colobuses
 * Black colobus, Colobus satanas
 * Angola colobus, Colobus angolensis
 * King colobus, Colobus polykomos
 * Ursine colobus, Colobus vellerosus
 * Mantled guereza, Colobus guereza
 * Genus Piliocolobus – red colobuses
 * Western red colobus, Piliocolobus badius
 * Pennant's colobus, Piliocolobus pennantii
 * Preuss's red colobus, Piliocolobus preussi
 * Thollon's red colobus, Piliocolobus tholloni
 * Central African red colobus, Piliocolobus foai
 * Ugandan red colobus, Piliocolobus tephrosceles
 * Uzungwa red colobus, Piliocolobus gordonorum
 * Zanzibar red colobus, Piliocolobus kirkii
 * Tana River red colobus, Piliocolobus rufomitratus
 * Genus Procolobus
 * Olive colobus, Procolobus verus
 * Langur (leaf monkey) group
 * Genus Semnopithecus – gray langurs or Hanuman langurs
 * Nepal gray langur, Semnopithecus schistaceus
 * Kashmir gray langur, Semnopithecus ajax
 * Tarai gray langur, Semnopithecus hector
 * Northern plains gray langur, Semnopithecus entellus
 * Black-footed gray langur, Semnopithecus hypoleucos
 * Southern plains gray langur, Semnopithecus dussumieri
 * Tufted gray langur, Semnopithecus priam
 * Genus Trachypithecus – lutungs
 * T. vetulus group
 * Purple-faced langur, Trachypithecus vetulus
 * Nilgiri langur, Trachypithecus johnii
 * T. cristatus group
 * Javan lutung, Trachypithecus auratus
 * Silvery lutung or Silvered leaf monkey, Trachypithecus cristatus
 * Indochinese lutung, Trachypithecus germaini
 * Tenasserim lutung, Trachypithecus barbei
 * T. obscurus group
 * Dusky leaf monkey or Spectacled leaf monkey, Trachypithecus obscurus
 * Phayre's leaf monkey, Trachypithecus phayrei
 * T. pileatus group
 * Capped langur, Trachypithecus pileatus
 * Shortridge's langur, Trachypithecus shortridgei
 * Gee's golden langur, Trachypithecus geei
 * T. francoisi group
 * Francois' langur, Trachypithecus francoisi
 * Hatinh langur, Trachypithecus hatinhensis
 * White-headed langur, Trachypithecus poliocephalus
 * Laotian langur, Trachypithecus laotum
 * Delacour's langur, Trachypithecus delacouri
 * Indochinese black langur, Trachypithecus ebenus
 * Genus Presbytis – surilis
 * Sumatran surili, Presbytis melalophos
 * Banded surili, Presbytis femoralis
 * Sarawak surili, Presbytis chrysomelas
 * White-thighed surili, Presbytis siamensis
 * White-fronted surili, Presbytis frontata
 * Javan surili, Presbytis comata
 * Thomas's langur, Presbytis thomasi
 * Hose's langur, Presbytis hosei
 * Maroon leaf monkey, Presbytis rubicunda
 * Mentawai langur or Joja, Presbytis potenziani
 * Natuna Island surili, Presbytis natunae
 * Odd-Nosed group
 * Genus Pygathrix – doucs
 * Red-shanked douc, Pygathrix nemaeus
 * Black-shanked douc, Pygathrix nigripes
 * Gray-shanked douc, Pygathrix cinerea
 * Genus Rhinopithecus – snub-nosed monkeys
 * Golden snub-nosed monkey, Rhinopithecus roxellana
 * Black snub-nosed monkey, Rhinopithecus bieti
 * Gray snub-nosed monkey, Rhinopithecus brelichi
 * Tonkin snub-nosed langur, Rhinopithecus avunculus
 * Genus Nasalis
 * Proboscis monkey, Nasalis larvatus
 * Genus Simias
 * Pig-tailed langur, Simias concolor