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Homo Floresiensis

Homo Floresiensis - wall art, prehistory, prehistoire, art parietal, neanderthal, homo sapiens
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Homo floresiensis ("Flores Man"; nicknamed Hobbit) is a possible species in the genus Homo, remarkable for its small body and brain and for its survival until relatively recent times. It was named after the Indonesian island of Flores on which the remains were found. One largely complete subfossil skeleton (named LB1, because it was the first specimen found in the Liang Bua cave) and a complete jawbone from a second individual (LB2), dated at 18,000 years old, were discovered in deposits in Liang Bua Cave on Flores in 2003. Parts of seven other individuals (LB3–LB9; the most complete is LB6), all diminutive, have been recovered as well as similarly small stone tools from horizons ranging from 94,000 to 13,000 years ago. Descriptions of the remains were first published in October 2004. To date, the only complete cranium is that of LB1.

The discoverers (anthropologists Peter Brown, Michael Morwood and their colleagues) have argued that a variety of features, both primitive and derived, identified the skeleton of LB1 as that of a new species of the Hominini tribe, H. floresiensis, that currently comprises humans (Homo) and two species of chimpanzee (Pan), their ancestors, and the extinct lineages of their common ancestor. They argued that it lived contemporaneously with modern humans (Homo sapiens) on Flores.

Doubts that the remains constitute a new species were soon voiced by the Indonesian anthropologist Teuku Jacob, who suggested that the skull of LB1 was a microcephalic modern human. A controversy developed, leading to the publication of a number of studies which supported or rejected claims for species status. In March 2005 scientists who published details of the brain of Flores Man in Science supported species status. Several researchers, including one scientist who worked on the initial study, have disputed the 2005 study, supporting the conclusion that the skull is microcephalic. The original discoverers have argued against these interpretations and maintain that H. floresiensis is a distinct species. This is supported by a recent study published by paleoneurologist Dean Falk and her colleagues that disputes the possibility of microcephaly. They compared the H. floresiensis brain to ten microcephalic brains, and revealed distinct differences. In addition, a 2007 study of carpal bones of H. floresiensis found similarities to those of a chimpanzee or early hominin such as Australopithecus and significant differences from the bones of modern humans. Studies of the bones and joints of the arm, shoulder and the lower limbs have also suggested that H. floresiensis was more similar to early humans and apes than modern humans. However, critics of the claim to species status continue to suggest alternative explanations. One recent hypothesis is that the individuals were born without a functioning thyroid, resulting from a type of endemic cretinism (myxoedematous, ME).

A study published in July 2009 found that cladistic analysis supports that H. floresiensis is a separate species.

Wiki
Maia Uploaded by Maia on . Homo Floresiensis - Desktop Nexus Animals Download free wallpapers and background images: Homo Floresiensis. Desktop Nexus Animals background ID 179109. Homo floresiensis ("Flores Man"; nicknamed Hobbit) is a possible species in the genus Homo, remarkable for its small body and brain and for its survival until relatively recent times. It was named after the Indonesian island of Flores on which the remains were found. One largely complete subfossil skeleton (named LB1, because it was the first specimen found in the Liang Bua cave) and a complete jawbone from a second individual (LB2), dated at 18,000 years old, were discovered in deposits in Liang Bua Cave on Flores in 2003. Parts of seven other individuals (LB3–LB9; the most complete is LB6), all diminutive, have been recovered as well as similarly small stone tools from horizons ranging from 94,000 to 13,000 years ago. Descriptions of the remains were first published in October 2004. To date, the only complete cranium is that of LB1.

The discoverers (anthropologists Peter Brown, Michael Morwood and their colleagues) have argued that a variety of features, both primitive and derived, identified the skeleton of LB1 as that of a new species of the Hominini tribe, H. floresiensis, that currently comprises humans (Homo) and two species of chimpanzee (Pan), their ancestors, and the extinct lineages of their common ancestor. They argued that it lived contemporaneously with modern humans (Homo sapiens) on Flores.

Doubts that the remains constitute a new species were soon voiced by the Indonesian anthropologist Teuku Jacob, who suggested that the skull of LB1 was a microcephalic modern human. A controversy developed, leading to the publication of a number of studies which supported or rejected claims for species status. In March 2005 scientists who published details of the brain of Flores Man in Science supported species status. Several researchers, including one scientist who worked on the initial study, have disputed the 2005 study, supporting the conclusion that the skull is microcephalic. The original discoverers have argued against these interpretations and maintain that H. floresiensis is a distinct species. This is supported by a recent study published by paleoneurologist Dean Falk and her colleagues that disputes the possibility of microcephaly. They compared the H. floresiensis brain to ten microcephalic brains, and revealed distinct differences. In addition, a 2007 study of carpal bones of H. floresiensis found similarities to those of a chimpanzee or early hominin such as Australopithecus and significant differences from the bones of modern humans. Studies of the bones and joints of the arm, shoulder and the lower limbs have also suggested that H. floresiensis was more similar to early humans and apes than modern humans. However, critics of the claim to species status continue to suggest alternative explanations. One recent hypothesis is that the individuals were born without a functioning thyroid, resulting from a type of endemic cretinism (myxoedematous, ME).

A study published in July 2009 found that cladistic analysis supports that H. floresiensis is a separate species.

Wiki
Rating: 4.4

Wallpaper Comments (1)

carlosalberto1948
Posted by carlosalberto1948 on 08/30/12 at 02:53 AM
very nice jajaja- 20
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Total Downloads: 479
Times Favorited: 6
Uploaded By: Maia
Date Uploaded: September 16, 2009
Filename: resiensis-1600x1200.jpg
Original Resolution: 1600x1199
File Size: 1.12MB
Category: Primates

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