Abstract：
:We report the frequencies of linear enamel hypoplasia (LEH) and, specifically, pitting enamel hypoplasia (PEH) defects in the teeth of Paranthropus robustus, for comparison with four other South African hominin species and three extant nonhuman primate species. Unlike LEH, the lesser known PEH is characterized by multiple circular depression defects across a tooth crown and is often difficult to interpret in terms of developmental timing and etiology. Teeth in all samples were examined macroscopically with type, position and number of defects recorded. Frequencies of teeth with LEH vary among hominin species, but the differences in PEH are considerable. That is, P. robustus has much higher rates of pitting defects, with 47% of deciduous teeth and 14% of permanent teeth affected, relative to 6.7% and 4.3%, respectively, for all other hominin teeth combined; none of the extant primate samples evidences comparable rates. The defects on P. robustus molars are unlike those in other species, with entire crowns often covered in small circular depressions. The PEH is most consistent with modern human examples of amelogenesis imperfecta. Additionally, the defects are: 1) not found on anterior teeth, 2) uniform in shape and size, and 3) similar in appearance/severity on all molars. Therefore, this form of PEH may have been a side effect of selection on another trait that shares the same coding gene(s), i.e., these defects have a genetic origin. We discuss a possible scenario that may explain how this form of PEH evolved to become so common in the Paranthropus genus.
journal_name
J Hum Evoljournal_title
Journal of human evolutionauthors
Towle I,Irish JDdoi
10.1016/j.jhevol.2019.01.002subject
Has Abstractpub_date
2019-04-01 00:00:00pages
54-61eissn
0047-2484issn
1095-8606pii
S0047-2484(18)30311-7journal_volume
129pub_type
杂志文章abstract：:Understanding the benefits and costs of acquiring and consuming different forms of animal matter by primates is critical for identifying the selective pressures responsible for increased meat consumption in the hominin lineage. Chimpanzees (Pan troglodytes) are unusual among primates in the amount of vertebrate prey t...
journal_title：Journal of human evolution
pub_type： 杂志文章,评审
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journal_title：Journal of human evolution
pub_type： 历史文章,杂志文章
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pub_type： 杂志文章
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journal_title：Journal of human evolution
pub_type： 杂志文章
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journal_title：Journal of human evolution
pub_type： 杂志文章
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pub_type： 杂志文章
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pub_type： 杂志文章
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更新日期：2002-09-01 00:00:00
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journal_title：Journal of human evolution
pub_type： 杂志文章
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pub_type： 杂志文章,评审
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pub_type： 评论,新闻
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pub_type： 历史文章,杂志文章,评审
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pub_type： 杂志文章
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journal_title：Journal of human evolution
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