Macroevolution of Hominids Essay

Evolutionary scientists believe that all living things are as a consequence of assorted developments happening due to climatically and environmental alterations over a long period of clip. Surveies show that the hominid is the word used to mention to human household which consist of human and ape ascendants ( Niles. 2005 ) . There are assorted surveies touching on the macroevolution of hominids and though fragmented there is touchable grounds to turn out development of human history. This paper is written to critically analyse the construct of macroevolution of Hominids. Hominid species in this paper will be recorded in footings of visual aspect in the dodo records:

Sahelanthropus tehadensis: This species was discovered in 2002 from dodos found in Chad which is a state in Central Africa ( Cameron. 2004 ) . This species is deemed as one of the oldest dodos in the universe since its being day of the months 6 to 7 million old ages ago. The characteristics of the dodos showed disconnected lower jaws and dentition. the encephalon was really little of about 350cc ( Haviland. 2003 ) . This species besides had really little eyetooth dentitions and from its construction it can be argued that it came from the Pan troglodytes and human ascendants ( Cameron. 2004 ) .

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Orrorin tugensis: This species was discovered in western Kenya a state in the African continent in 2001 ( Haviland. 2003 ) . The dodos include fragmental arm. dentition. thigh castanetss which day of the month back to 6 million old ages old and its construction was somewhat bigger that of Sahelanthropus tehadensis ( Haviland. 2003 ) . There are many contentions environing this species since some believe it was a human ascendant while others think it was a chimpanzee ascendant. Ardipithecus ramidus: This species was discovered in 1994 and its beginning day of the months back to 4. 4 million old ages ago.

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Indirect grounds points that the species was bipedal with a tallness of about 4 inches tall ( Jurmain. Kilgore. Trevathan. Nelson. 2003 ) . The dentition seemed to resemble those of earlier apes with one babe tooth resembling that of a Pan troglodytes tooth ( Cameron. 2004 ) . Most likely the species lived in the wood and that explains why most hominids were two-footed. Australophithecus anamensis: This species were discovered in 1995 with most of the dodos being discovered in Kenya ( Jurmain. Kilgore. Trevathan. Nelson. 2003 ) . The dentition and jaws were really similar to those of older dodos.

This species is capable to contradictions between evolutionary scientists. Australopithecus afarensis: This species existed between 3. 9 and 3. 0 million old ages ago and it had an ape like face. stick outing jaws and big black dentition ( Larsen. Matter. Gebo. 1998 ) . The encephalon size was between 375 to 550 milliliter and the dentitions are more human like with disparities from both Pan troglodytess and those of worlds ( Christopher. 2004 ) . The fossil castanetss available show that they were really strong although females are smaller than work forces with differences runing from 3. 6 inches to 5 inches.

Kenyanthropus platyops: This species was found out in Kenya with varied assorted characteristics from the early apes. The dodo is aged about 3. 5 million old ages old and the skull is the same as that Australopithecus afarensis and Austrolopithecus africanus ( Lemonick. Dorfman. 2001 ) . The species has a big level face and little dentitions. Australopithecus africanus: This species existed 3 to 3 million old ages ago and has a larger encephalon runing 420 and 500 milliliter ( Larsen. Matter. Gebo. 1998 ) . The encephalon is larger than that of the Pan troglodytes and the dentitions are much larger than those of the worlds.

Australopithecus garli: This species were discovered in 1999 and they have larger size of dentitions and have crude skull morphology ( Haviland. 2003 ) . Merely a partial skull was discovered so no much decisions were made. Australopithecus aethiopicus: this species existed between 2. 6 and 2. 3 million old ages ago. The species had a encephalon size of 410cc and crude limbs like large face. jaws and besides had the largest sagital crest in any known hominid ( Larsen. Matter. Gebo. 1998 ) . Australopithecus Boises ( was Zinjanthropus boisei ) : This species had a learger skull and dentitions and its being day of the months back to 2 to 1.

5 million old ages ago. It had a encephalon size of about 530 milliliter and the castanetss excavated with the species may hold been used as excavation tools ( Haviland. 2003 ) . Their construction leads scientists to believe that they are human ascendants. Homo habilis: This species is called the ready to hand adult male more particularly with the grounds tools found with his remains. The species existed around 2. 4 and 1. 5 million old ages ago and the black dentition a larger than those of the modern adult male and a encephalon size of 650 milliliters with specialised address countries ( Larsen. Matter. Gebo. 1998 ) . Homo habilis was about 5 inches tall and weighed 45 kilogram.

Homo georgicus: This species was discovered in Georgia in Dnanisi and the dodo is about 1. 8 million old ages old. The encephalon size varies between 600 and 780 milliliter with an estimated tallness of about 4’11’ ( Jurmain. Kilgore. Trevathan. Nelson. 2003 ) . Homo erectus: This species existed between 1. 8 million old ages and 300. 000 old ages ago. This species has stick outing jaws. long low skull. no mentum and encephalon size between 750cc to 1225cc ( Christopher. 2004 ) . The skeleton showed that the species was more attached to modern adult male with an unsloped walking pace.

Other surveies show that the Homo habilis may hold used fire and rock in advanced mode compared to old Stone Age species. Home sapiens ( antediluvian ) : This species appeared 500. 000 old ages ago and is straight affiliated to the modern human existences and the encephalon size is larger than that of the Homo erectus: 1200 milliliter ( Cameron. 2004 ) . Homo sapiens neanderthalensis: this more modern adult male like species existed 230. 000 and 30. 000 old ages ago ( Christopher. 2004 ) . The encephalon size is bigger about 1450cc with a pronounced buldge at the dorsum of its skull. the mentum is weak and has a tallness of about 5’6’ inches ( Jurmain. Kilgore. Trevathan. Nelson. 2003 ) .

The bone construction is thick and strong depiction powerful musculuss. The dodos were found with tools and arms demoing an organized signifier of life. Homo Floresiensis: This species is a dwarf signifier of Homo erectus. used rock tools and fire and hunted midget elephants found in Indonesian Island where it was discovered in 2003 ( Jurmain. Kilgore. Trevathan. Nelson. 2003 ) . The grownup female was about 1 metre tall and the encephalon size was 417 milliliter. Homosexual sapiens sapiens ( modern ) : Modern Homo sapiens foremost appeared about 195. 000 old ages ago.

Modern human existences have a encephalon size of 1350 milliliter. rised brow. little supercilium ridges ( Niles. 2005 ) . The species used improved forms of bone tools. had vesture. and practiced sculpting through decorating tools. tusk. doing carvings of worlds and animate beings. musical instruments and clay figures ( Niles. 2005 ) . The teeth degree Fahrenheit this species is 10 % more robust that those of modern human existences. Below is a clip line of the macroevolution of hominids Sahelanthropus tchadensis Orrorin tugenensis Ardipithecus ramidus Australopithecus anamensis Australopithecus afarensis

Kenyanthropus platyops Australopithecus africanus Australopithecus garhi Australopithecus aethiopicus Australopithecus boisei Homo habilis Homo georgicus Homo erectus Homo antecessor Homo neanderthalensis Homo floresiensis Homo sapiens sapiens Reference list Cameron. D. W. ( 2004 ) . Bones. Stones. and Molecules: “Out of Africa” and Human Origins. Burlington. MA: Elsevier Academic Press. Christopher S. ( 2004 ) . The Human Narrative: Our Development from Prehistoric Ancestors to Today. Washington. D. C. : National Geographic. Haviland WA. ( 2003 ) . Evolutionary forces.

Human Evolution and Prehistory. 6thed. Belmont. Calcium: Wadsworth/Thomson Learning. p. 74-80 Jurmain R. Kilgore L. Trevathan W. Nelson H. ( 2003 ) . Chapter 1: The development ofevolutionary theory. Introduction to Physical Anthropology. 9thed. Belmont. Calcium: Wadsworth/Thomson Learning. Larsen. CS. Matter RM. Gebo DL. ( 1998 ) . Human Origins: The Fossil Record. 3rd Edition. Prospect Heights. Illinois: Waveland Press. Inc. Lemonick MD. Dorfman A. ( 2001 ) . One elephantine measure for world. Time 158 ( 3 ) :54-61. Niles E. ( 2005 ) . Darwin: Detecting the Tree of Life. New York: W. W. Norton & A ; Company.

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