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New Interpretations of Ape and Human Ancestry

Russell L. Ciochon, +1 more
- Vol. 19, Iss: 4, pp 671
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The article was published on 1983-01-01. It has received 266 citations till now.

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Dating of the human-ape splitting by a molecular clock of mitochondrial DNA.

TL;DR: A new statistical method for estimating divergence dates of species from DNA sequence data by a molecular clock approach is developed, and this dating may pose a problem for the widely believed hypothesis that the bipedal creatureAustralopithecus afarensis, which lived some 3.7 million years ago, was ancestral to man and evolved after the human-ape splitting.
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Is a new and general theory of molecular systematics emerging

TL;DR: It is argued that to better deal with the large multilocus datasets brought on by phylogenomics, and to better align the fields of phylogeography and phylogenetics, the primacy of species trees should be embraced.
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Genetic evidence for complex speciation of humans and chimpanzees

TL;DR: This analysis shows that human–chimpanzee speciation occurred less than 6.3 million years ago and probably more recently, conflicting with some interpretations of ancient fossils and most strikingly, chromosome X shows an extremely young genetic divergence time, close to the genome minimum along nearly its entire length.
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Comparison of cranial ontogenetic trajectories among great apes and humans

TL;DR: It is found that adult Homo sapiens specimens are clearly separated from the great apes in shape space and size-shape space and the small genetic differences between Homo and Pan affect early human ontogeny to induce the distinct adult human craniofacial morphology.
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Significance of enamel thickness in hominoid evolution

TL;DR: Evaluating the usefulness of enamel thickness and microstructure as characteristics for determining the relationships of the later Miocene hominoids is evaluated, based both on a quantitative study ofEnamel thickness in extant hominoid and four species of laterMiocene Sivapithecus (including ‘Ramapitalcus’) and on scanning electron microscope analysis of enameling microst structure.
References
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Immunological Time Scale for Hominid Evolution

TL;DR: The studies with the quantitative micro-complement fixation method confirm the observation that apes and man have a more recent common ancestry than is usually supposed and lead to the suggestion that man and Old World monkeys last shared a common ancestor 30 million years ago.
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Comparative and functional morphology of hominoid fingers

TL;DR: Comparisons of hominoid metacarpals and phalanges reveal differences, many of which are closely linked to locomotor hand postures, from hylobatid apes to male gorillas.
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New hominoid skull material from the Miocene of Pakistan

TL;DR: The fossil is a Sivapithecus indicus adult, probably male, and consists of most of the left side of the face including a small portion of the frontal bone, the zygomatic arch and temporo-mandibular joint, the maxilla, a virtually entire mandible and the complete dentition.
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Pygmy chimpanzee as a possible prototype for the common ancestor of humans, chimpanzees and gorillas

TL;DR: It is argued that, among living species, the pygmy chimpanzee (P. paniscus) offers us the best prototype of the prehominid ancestor and biochemical, morphological, behavioural and palaeontological data support this proposition and argue for a relatively recent and accelerated divergence of the hominid from the pongid line.
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New hominoid primates from the Siwaliks of Pakistan and their bearing on hominoid evolution

TL;DR: Siwalik deposits in the Punjab have yielded a rich collection of hominoidprimate remains that indicate the need for some changes in hominoids classification, according to other recent finds.