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This question is asking about the anatomical differences between the genus homo as well as the genus australopithecus in terms of skull, spinal column or the spinal cord, pelvic girdle, femur as well as the foot.
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First is skull.
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In case of australopithecus they have small brain size whereas the members of homogenes having the large brain size.
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Next is australopithecus have big bro ridge on the eye socket, whereas the homogenous has small bro ridge.
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The australopithecus having large -sized teeth, whereas the genus homo having small teeth.
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The jawbone in australopithecus is massive, whereas the genus homo has narrow jawbones.
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The last difference is australopithecus has prognathes snout.
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Whereas the members of homogeneous has orthognathous gnauthe.
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The next feature is spinal column or the spinal cord.
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In case of modern humans, they are present 33 vertebrae in the spinal cord.
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And these vertebrae comprises of 7 cervical vertebrae, 12 thoracic vertebrae, 5 lumbar vertebrae and the two other are 5 sacral vertebrae as well as 4 caudal vertebrae.
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But in australopithecus, they have the presence of thoracic vertebrae, but the cervical vertebrae is absent in them.
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And similar to the modern human, they have five lumber as well as the five sacral vertebrae...