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Phylogeny Of Homo sapiens sapiens

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Lucia Carrasco

on 9 February 2014

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Transcript of Phylogeny Of Homo sapiens sapiens

Homo sapiens sapiens
According to research, human beings as we know them today first originated in Africa about 300,000 years ago. These modern humans are called Homo Sapiens .

In a few thousand years, Homo sapiens spread to every continent on the planet , populating many islands along the way.

In the process of migration from Africa, Homo Sapiens caused the extinction of the Neanderthals in Europe and Homo erectus in Asia. It is believed that this can be given by an absorption in intersecting or through destruction through war and competition.

Thanks to its power of reasoning, Homo Sapiens built machines , buildings , bridges, and made space travel. One need only look around us to realize what he achieved his thinking ability .

Humans were changing the face of the planet that emerged , improving day to day quality of life .
Australopithecus afarensis
He lived between 3 and 3.9 million years before present. It is believed that only lived in East Africa (Ethiopia, Tanzania and Kenya).

Habitat: Dry and cleared forests. They arboreal activity.

  It was thin and slender build, height between 120 and 150 cm, and weight between 33 and 67 kg, different from us in several ways:
-Cranial capacity much lower: 375-550 D.C.
-Activity Tree fairly active, either picking fruit, sleeping, playing etc..
-His chest was not flat but narrowed sharply upward.
-High degree of sexual dimorphism (physical differences between males and females of the same species).
Homo erectus
This species inhabiting the Earth began about 1.8 million years ago and became extinct about 130 thousand. Found remains of Homo erectus in Africa and in Europe and Asia, including the islands of Southeast latter continent.

Homo erectus means "man who walks upright '. It is thought that originally these hominids were food gatherers, but later began to feed on animals that were already dead, eventually as hunter-gatherer tribes.
Homo antecessor
Between 800,000 to 500,000 years.

It has a mixture of primitive and modern: had a very modern face, this species underwent a complete restructuring of the braincase, mandible (thinner), teeth (smaller) and the face is totally different from the above. Its cranial capacity not exceeding 1000 cc and height was less than 1.70 m. Its development pattern would be similar to ours, with childhood and adolescence longer.

Their diet consisted of a variety of plant elements which must be added the animals they hunt (deer, horses, and large cattle) or scavenge (mammoths or rhinos). In all this we must not forget that the Homo antecessor practiced cannibalism.
Homo sapiens neanderthalensis
Early Neanderthals lived in Europe 200,000 years ago. However disappeared about 30,000 ago, when modern humans arrived in the region.

These modern humans were Homo Sapiens, which originated in Africa, had begun to spread around the world about 100,000 years ago. Neanderthals became extinct because Sapiens had better brains and more sophisticated tools.

Neanderthal cranial capacity, measured in cubic centimeters, was equal to or greater than that of Homo sapiens. His skeleton was robust, his short legs, and long trunk. He was also stout and short stature.

To survive, the Neanderthals hunted, gathered fruits and fished. When hunted animals captured using wooden spears that they knew how to make.
Phylogenetic tree of homo sapiens sapiens sapiens
The most complete fossil named Lucy, was discovered by American Donald Johanson on November 24, 1974. This is the skeleton of a female about 1 meter in height, approximately 27 kg of weight (in life), about 20 years of age (wisdom teeth were just out) and apparently had children.
Lucía Carrasco
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