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A monkey is any cercopithecoid (Old World monkey) or platyrrhine (New World monkey) primate. All primates that are not prosimians or apes are monkeys. The 264 known extant monkey species represent two of the three groupings of simian primates (the third group being the 22 species of apes). Monkeys are generally considered to be intelligent and, unlike apes, monkeys usually have tails.
The New World monkeys are classified within the parvorder Platyrrhini, whereas the Old World monkeys (superfamily Cercopithecoidea) form part of the parvorder Catarrhini, which also includes the apes. Thus, scientifically speaking, monkeys are paraphyletic (not a single coherent group) and Old World monkeys are actually more closely related to the apes than they are to the New World monkeys.
The term 'monkey' is an artificial grouping; it is not a "good" taxon, but instead it is a paraphyletic group, like "fish". A "good" taxon, as most modern biologists consider it, is a monophyletic group, that is, a group consisting of all the evolutionary descendants of a single ancestor species. The term 'monkey' covers all platyrrhines (flat, broad noses) and some catarrhines (nostrils-downwards), but excludes the apes.
Due to its size (up to ) the Mandrill is often thought to be an ape, but it is actually an Old World monkey. Also, a few monkey species deceptively have the word "ape" in their common name, such as the Barbary Ape.
A group of monkeys may be referred to as a mission or a tribe.
Some characteristics are shared among the groups; most New World monkeys have prehensile tails while Old World monkeys have non-prehensile tails or no visible tail at all. Some have trichromatic color vision like that of humans, others are dichromats or monochromats. Although both the New and Old World monkeys, like the apes, have forward facing eyes, the faces of Old World and New World monkeys look very different, though again, each group shares some features such as the types of noses, cheeks and rumps.
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Note that the smallest grouping that contains them all is the Simiiformes, the simians, which also contains the apes. Calling apes "monkeys" is considered scientifically incorrect as apes are distinctly defined as different from monkeys. Apes were included in earlier use of the term, predating modern classifications. Including some or all apes (other than humans) remained the common usage in the early 20th century and is still in colloquial use. Calling either a simian is correct.
In some areas, some species of monkey are considered agricultural pests, and can cause extensive damage to commercial and subsistence crops. This can have important implications for the conservation of endangered species, which may be subject to persecution. In some instances farmers' perceptions of the damage may exceed the actual damage. Monkeys that have become habituated to human presence in tourist locations may also be considered pests, attacking tourists.
In religion and culture, the monkey often represents quick-wittedness and mischief.
The use of monkeys in laboratories is controversial. Animal rights activists claim that their use is cruel and produces little information of value, and there have been many protests, vandalism to testing facilities and threats to workers. Others claim that it has led to many important medical breakthroughs such as the rabies vaccine, understanding of human reproduction and basic knowledge about brain function and that the prevention of harm to humans should be a higher priority than the possible harm done to monkeys. The topic has become a popular cause for animal rights and animal welfare groups.
Monkeys are prevalent in numerous books, television programs, and movies. The television series Monkey and the literary characters Monsieur Eek and Curious George are all examples.
Informally, the term "monkey" is often used more broadly than in scientific use, and may be used to refer to apes, particularly chimpanzees, gibbons, and gorillas. Author Terry Pratchett alludes to this difference in usage in his Discworld novels, in which the Librarian of the Unseen University is an orangutan who gets very violent if referred to as a monkey.
The Winged monkeys are prominent characters in The Wizard of Oz.
In Buddhism, the monkey is an early incarnation of Buddha but may also represent trickery and ugliness. The Chinese Buddhist "mind monkey" metaphor refers to the unsettled, restless state of human mind. Monkey is also one of the Three Senseless Creatures, symbolizing greed, with the tiger representing anger and the deer lovesickness.
The Mizaru or three wise monkeys are revered in Japanese folklore.
The Moche people of ancient Peru worshipped nature. They placed emphasis on animals and often depicted monkeys in their art.
This text is licensed under the Creative Commons CC-BY-SA License. This text was originally published on Wikipedia and was developed by the Wikipedia community.