The human chin revisited: what is it and who has it?

@article{Schwartz2000TheHC,
  title={The human chin revisited: what is it and who has it?},
  author={Jeffrey H Schwartz and Ian Tattersall},
  journal={Journal of human evolution},
  year={2000},
  volume={38 3},
  pages={
          367-409
        }
}
Although the presence of a "chin" has long been recognized as unique to Homo sapiens among mammals, both the ontogeny and the morphological details of this structure have been largely overlooked. Here we point out the essential features of symphyseal morphology in H. sapiens, which are present and well-defined in the fetus at least as early as the fifth gestational month. Differences among adults in expression of these structures, particularly in the prominence of the mental tuberosity, are… 
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138 Citations

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TLDR
A basic morphometric description and comparison of the endocast of Jebel Irhoud 1 shows that the upper parietal areas show a certain parasagittal lateral bulging, as in European Neandertals, and it seems likely that the origin of the modern human lineage may have predated theorigin of many aspects of themodern human brain.
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References

SHOWING 1-10 OF 58 REFERENCES
The Origin and Evolution of the Human Dentition
TLDR
The reviewer approached the problem by making an elaborate analysis of the structural “make-up” of man and of anthropoid apes, noting the kind and extent of their common heritage and the kind or extent of theStructural features peculiar to each, which therefore may be regarded as latter-day acquisitions.
Chin morphology and sexual dimorphism in the fossil hominid mandible sample from Klasies River Mouth.
TLDR
This study compares the size range and chin morphology exhibited by the KRM mandibles with that of Neandertals, Upper Pleistocene humans, and recent humans to find a similarly low frequency of pronounced chins is very unlikely to be found in any recent human population.
Age at death of the Neanderthal child from Devil's Tower, Gibraltar and the implications for studies of general growth and development in Neanderthals.
TLDR
If the cranial bones from Devil's Tower are associated with the dental material, as the authors believe, they indicate a remarkably precocious brain growth in this individual, which is consistent with what is known about general growth and development in Neanderthals.
A Neandertal infant from Amud Cave, Israel
A newly discovered partial skeleton of an infant from the Amud Cave, Israel, displays an array of anatomical features that help to establish its taxonomic status as Homo neanderthalcrisis: the…
Significance of some previously unrecognized apomorphies in the nasal region of Homo neanderthalensis.
  • J. Schwartz, I. Tattersall
  • Geography, Biology
    Proceedings of the National Academy of Sciences of the United States of America
  • 1996
TLDR
The purpose of this contribution is to describe specializations of the Neanderthal internal nasal region that make them unique not only among hominids but possibly among terrestrial mammals in general as well.
A reconsideration of the Archi 1 Neandertal mandible.
A reassessment of the early last glacial immature Neandertal mandibular corpus from Archi indicates a series of features in which it closely resembles other pre-adolescent Neandertal mandibles and…
The Origin and Evolution of the Human Dentition
TLDR
The cercopithecine monkeys of Miocene and later epochs, the ancestry of the gibbons, and zoogeographic relations of Europe, Asia, and Africa, during the Eocene and Middle Tertiaryepochs.
Neandertal nasal structures and upper respiratory tract "specialization".
  • R. G. Franciscus
  • Biology
    Proceedings of the National Academy of Sciences of the United States of America
  • 1999
TLDR
The anatomical basis for Schwartz and Tattersall's contentions is critically reviewed, revealing several serious problems with their analysis, including reliance on specimens with damaged, incomplete, or, in some cases, entirely absent relevant anatomy; failure to consider primary vs. secondary spatial consequences in nasal trait conceptualization; and to consider actual ranges of variation in these traits in both fossil and recent humans.
Toward distinguishing Homo neanderthalensis from Homo sapiens, and vice versa
TLDR
One of the major features used to distinguish Neanderthals from modern humans (the prominence of the occipitomastoid crest) is not valid and comparative data indicating that Homo sapiens (not Neanderthal) possesses the derived character states of the vaginal and styloid processes is provided.
Species recognition in human paleontology
...
1
2
3
4
5
...