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34-587: See text Agoristenidae are a neotropical harvestman family of the Suborder Laniatores , in the superfamily Gonyleptoidea . The name of the type genus is a combination of Ancient Greek agora "gathering" and stenos "few", referring to the rarity of the family at the time of its discovery. These harvestmen range in body length from two to about five millimeters. Their coloring ranges from yellowish to dark brown. Some show yellow stripes or white or green patches. The subfamily Agoristeninae

68-489: A common ancestral language. This is what makes up a language family , which is a set of languages for which sufficient evidence exists to demonstrate that they descend from a single ancestral language and are therefore genetically related. For example, English is related to other Indo-European languages and Mandarin Chinese is related to other Sino-Tibetan languages . By this criterion, each language isolate constitutes

102-713: A diverse array of indigenous peoples , who to varying degrees persist in their autonomous and traditional cultures and subsistence within this environment. The number of these peoples who are as yet relatively untouched by external influences continues to decline significantly, however, along with the near-exponential expansion of urbanization , roads, pastoralism and forest industries which encroach on their customary lands and environment. Nevertheless, amidst these declining circumstances this vast "reservoir" of human diversity continues to survive, albeit much depleted. In South America alone, some 350–400 indigenous languages and dialects are still living (down from an estimated 1,500 at

136-882: A dozen sign languages of the hill tribes in Thailand including the Ban Khor Sign Language . These and more are all presumed isolates or small local families, because many deaf communities are made up of people whose hearing parents do not use sign language, and have manifestly, as shown by the language itself, not borrowed their sign language from other deaf communities during the recorded history of these languages. Some languages once seen as isolates may be reclassified as small families because their genetic relationship to other languages has been established. This happened with Japanese and Ryukyuan languages , Korean and Koreanic languages , Atakapa and Akokisa languages , Tol and Jicaque of El Palmar languages, and

170-446: A family of its own. In some situations, a language with no ancestor can arise. This frequently happens with sign languages —most famously in the case of Nicaraguan Sign Language , where deaf children with no language were placed together and developed a new language. Caution is required when speaking of extinct languages as language isolates. Despite their great age, Sumerian and Elamite can be safely classified as isolates, as

204-450: A few remaining native speakers, with no new acquisition, highly restricted use, and near-universal multilingualism. "Extinct" languages have no native speakers, but are sufficiently documented to be classified as isolates. With few exceptions, all of Africa's languages have been gathered into four major phyla: Afroasiatic , Niger–Congo , Nilo-Saharan and Khoisan . However, the genetic unity of some language families, like Nilo-Saharan ,

238-526: A language previously considered an isolate may no longer be considered one, as happened with the Yanyuwa language of northern Australia , which has been placed in the Pama–Nyungan family. Since linguists do not always agree on whether a genetic relationship has been demonstrated, it is often disputed whether a language is an isolate. A genetic relationship is when two different languages are descended from

272-589: A language to classify it as either a language isolate or as a part of another language family. Unclassified languages are different from language isolates in that they have no demonstrable genetic relationships to other languages due to a lack of sufficient data. In order to be considered a language isolate, a language needs to have sufficient data for comparisons with other languages through methods of historical-comparative linguistics to show that it does not have any genetic relationships. Many extinct languages and living languages today are very poorly attested, and

306-585: Is endemic to the Greater Antilles . The other subfamilies have been found from northern South America . In older schemes, the now obsolete "Zamorinae" were the basal clade, with Agoristeninae and Leiosteninae as sister groups. Agoristeninae is sister group to all Gonyleptoidea except Stygnopsidae . Stygnopsidae "Zamorinae" Agoristeninae Leiosteninae other Gonyleptoidea (after Kury 1997b, 1997c) Excluded from Agoristenidae, now placed elsewhere: Neotropical In biogeography ,

340-628: Is endemic to the Neotropic realm, occupying a larger geographic area than any other piranha species. Some fish groups originally unique to the Neotropics include: Examples of other animal groups that are entirely or mainly restricted to the Neotropical region include: According to Simberloff. as of 1984 there were a total of 92,128 species of flowering plants (Angiosperms) in the Neotropics. Plant families endemic and partly subendemic to

374-725: Is mostly covered by tropical moist broadleaf forest , including the vast Amazon rainforest , which stretches from the Andes Mountains to the Atlantic Ocean, and the lowland forests of the Guianas . The bioregion also includes tropical savanna and tropical dry forest ecoregions. The Central Andes lie between the Gulfs of Guayaquil and Penas and thus encompass southern Ecuador, Chile, Peru, western Bolivia, and northwest and western Argentina. Eastern South America includes

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408-665: Is questionable, and so there may be many more language families and isolates than currently accepted. Data for several African languages, like Kwisi , are not sufficient for classification. In addition, Jalaa , Shabo , Laal , Kujargé , and a few other languages within Nilo-Saharan and Afroasiatic -speaking areas may turn out to be isolates upon further investigation. Defaka and Ega are highly divergent languages located within Niger–Congo -speaking areas, and may also possibly be language isolates. Current research considers that

442-536: Is the Nicaraguan Sign Language , a well documented case of what has happened in schools for the deaf in many countries. In Tanzania, for example, there are seven schools for the deaf, each with its own sign language with no known connection to any other language. Sign languages have also developed outside schools, in communities with high incidences of deafness, such as Kata Kolok in Bali, and half

476-461: Is yet unknown due to insufficient data on several languages. One explanation for the existence of language isolates is that they might be the last remaining member of a larger language family, said language possibly could have had relatives in the past that have since disappeared without being documented leaving it an orphaned language much like the Ket language spoken in central Siberia who belongs to

510-838: The Caatinga xeric shrublands of northeastern Brazil, the broad Cerrado grasslands and savannas of the Brazilian Plateau , and the Pantanal and Chaco grasslands. The diverse Atlantic forests of eastern Brazil are separated from the forests of Amazonia by the Caatinga and Cerrado, and are home to a distinct flora and fauna. North of the Gulf of Guayaquil in Ecuador and Colombia, a series of accreted oceanic terranes (discrete allochthonous fragments) have developed that constitute

544-656: The Cretaceous–Paleogene extinction event altered local flora and fauna. Much later, about two to three million years ago, South America was joined with North America by the formation of the Isthmus of Panama , which allowed a biotic exchange between the two continents, the Great American Interchange . South American species like the ancestors of the Virginia opossum ( Didelphis virginiana ) and

578-470: The Great American Interchange , an important biogeographical event. The Neotropic includes more tropical rainforest ( tropical and subtropical moist broadleaf forests ) than any other realm, extending from southern Mexico through Central America and northern South America to southern Brazil, including the vast Amazon rainforest . These rainforest ecoregions are one of the most important reserves of biodiversity on Earth. These rainforests are also home to

612-537: The Xincan Guatemala language family in which linguists have grouped the Chiquimulilla , Guazacapán , Jumaytepeque , and Yupiltepeque languages. Below is a list of known language isolates, arranged by continent, along with notes on possible relations to other languages or language families. The status column indicates the degree of endangerment of the language, according to the definitions of

646-547: The armadillo moved into North America, and North Americans like the ancestors of South America's camelids , including the llama ( Lama glama ), moved south. The long-term effect of the exchange was the extinction of many South American species, mostly by outcompetition by northern species. The Neotropical realm has 31 endemic bird families, which is over twice the number of any other realm. They include tanagers , rheas , tinamous , curassows , antbirds , ovenbirds , toucans , and seriemas . Bird families originally unique to

680-689: The temperate rain forests of the Valdivian temperate rain forests and Magellanic subpolar forests ecoregions, and the Juan Fernández Islands and Desventuradas Islands , are a refuge for the ancient Antarctic flora , which includes trees like the southern beech ( Nothofagus ), podocarps , the alerce ( Fitzroya cupressoides ), and Araucaria pines like the monkey-puzzle tree ( Araucaria araucana ). These rainforests are endangered by extensive logging and their replacement by fast-growing non-native pines and eucalyptus . South America

714-604: The Baudo, or Coastal, Mountains and the Cordillera Occidental. The Orinoco is a region of humid forested broadleaf forest and wetland primarily comprising the drainage basin for the Orinoco River and other adjacent lowland forested areas. This region includes most of Venezuela and parts of Colombia, as well as Trinidad and Tobago . The temperate forest ecoregions of southwestern South America, including

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748-943: The Neotropic include Bromeliaceae , Cannaceae and Heliconiaceae . Plant species with economic importance originally unique to the Neotropic include: Language isolate A language isolate is a language that has no demonstrable genetic relationship with any other languages. Basque in Europe, Ainu in Asia, Sandawe in Africa, Haida and Zuni in North America, Kanoê in South America , Tiwi in Australia and Burushaski in Pakistan are all examples of such languages. The exact number of language isolates

782-811: The Neotropic or Neotropical realm is one of the eight terrestrial realms . This realm includes South America, Central America , the Caribbean Islands , and southern North America. In Mexico, the Yucatán Peninsula and southern lowlands, and most of the east and west coastlines, including the southern tip of the Baja California Peninsula are Neotropical. In the United States southern Florida and coastal Central Florida are considered Neotropical. The realm also includes temperate southern South America. In contrast,

816-652: The Neotropical Floristic Kingdom excludes southernmost South America, which instead is placed in the Antarctic kingdom . The Neotropic is delimited by similarities in fauna or flora . Its fauna and flora are distinct from the Nearctic realm (which includes most of North America) because of the long separation of the two continents. The formation of the Isthmus of Panama joined the two continents two to three million years ago, precipitating

850-452: The Neotropics include hummingbirds (family Trochilidae) and wrens (family Troglodytidae). Mammal groups originally unique to the Neotropics include: The Neotropical realm has 63 endemic fish families and subfamilies, which is more than any other realm. Neotropical fishes include more than 5,700 species, and represent at least 66 distinct lineages in continental freshwaters (Albert and Reis, 2011). The well-known red-bellied piranha

884-604: The UNESCO Atlas of the World's Languages in Danger . "Vibrant" languages are those in full use by speakers of every generation, with consistent native acquisition by children. "Vulnerable" languages have a similarly wide base of native speakers, but a restricted use and the long-term risk of language shift . "Endangered" languages are either acquired irregularly or spoken only by older generations. "Moribund" languages have only

918-678: The fact that they cannot be linked to other languages may be a reflection of our poor knowledge of them. Hattic , Gutian , and Kassite are all considered unclassified languages, but their status is disputed by a minority of linguists. Many extinct languages of the Americas such as Cayuse and Majena may likewise have been isolates. Several unclassified languages could also be language isolates, but linguists cannot be sure of this without sufficient evidence. A number of sign languages have arisen independently, without any ancestral language, and thus are language isolates. The most famous of these

952-527: The languages are well enough documented that, if modern relatives existed, they would be recognizably related. A language thought to be an isolate may turn out to be related to other languages once enough material is recovered, but this is unlikely for extinct languages whose written records have not been preserved. Many extinct languages are very poorly attested, which may lead to them being considered unclassified languages instead of language isolates. This occurs when linguists do not have enough information on

986-580: The realm are, according to Takhtajan (1978), Hymenophyllopsidaceae , Marcgraviaceae , Caryocaraceae , Pellicieraceae , Quiinaceae , Peridiscaceae , Bixaceae , Cochlospermaceae , Tovariaceae , Lissocarpaceae ( Lissocarpa ), Brunelliaceae , Dulongiaceae , Columelliaceae , Julianiaceae , Picrodendraceae , Goupiaceae , Desfontainiaceae , Plocospermataceae , Tropaeolaceae , Dialypetalanthaceae ( Dialypetalanthus ), Nolanaceae ( Nolana ), Calyceraceae , Heliconiaceae , Cannaceae , Thurniaceae and Cyclanthaceae . Plant families that originated in

1020-693: The realm into bioregions , defined as "geographic clusters of ecoregions that may span several habitat types, but have strong biogeographic affinities, particularly at taxonomic levels higher than the species level (genus, family)." Laurel forest and other cloud forest are subtropical and mild temperate forest , found in areas with high humidity and relatively stable and mild temperatures. Tropical rainforest , tropical and subtropical moist broadleaf forests are highlight in Southern North America, Amazonia, Caribbean, Central America, Northern Andes and Central Andes. The Amazonia bioregion

1054-636: The standard to be seen as different languages. Examples include Japanese and Georgian : Japanese is now part of the Japonic language family with the Ryukyuan languages , and Georgian is the main language in the Kartvelian language family. There is a difference between language isolates and unclassified languages , but they can be difficult to differentiate when it comes to classifying extinct languages . If such efforts eventually do prove fruitful,

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1088-478: The time of first European contact ), in about 37 distinct language families and a further number of unclassified and isolate languages . Many of these languages and their cultures are also endangered. Accordingly, conservation in the Neotropical realm is a hot political concern, and raises many arguments about development versus indigenous versus ecological rights and access to or ownership of natural resources . The World Wide Fund for Nature (WWF) subdivides

1122-644: The wider Yeniseian language family, had it been discovered in recent times independently from its now extinct relatives such as Yugh and Kott it would have been classified as an isolate. Another explanation for language isolates is that they arose independently in isolation and thus do not share a common linguistic genesis with any other language but themselves. This explanation mostly applies to sign languages that have developed independently of other spoken or signed languages. Some languages once seen as isolates may be reclassified as small families if some of their dialects are judged to be sufficiently different from

1156-485: Was originally part of the supercontinent of Gondwana , which included Africa, Australia, India, New Zealand, and Antarctica, and the Neotropic shares many plant and animal lineages with these other continents, including marsupial mammals and the Antarctic flora . After the final breakup of the Gondwana about 110 million years ago, South America was separated from Africa and drifted north and west. 66 million years ago,

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