Oblique human symphyseal angle is associated with an evolutionary rate-shift early in the hominin clade.

Autor: Pampush JD; Department of Exercise Science, High Point University, High Point, NC, USA; Department of Physician Assistant Studies, High Point, NC, USA. Electronic address: jpampush@highpoint.edu., Scott JE; Department of Anthropology, The University of Iowa, Iowa City, IA, USA; Department of Sociology and Anthropology, Metropolitan State University of Denver, CO, USA., Robinson CA; Department of Biological Sciences, Bronx Community College, City University of New York, Bronx, NY, USA., Delezene LK; Department of Anthropology, University of Arkansas, Fayetteville, AR, USA.
Jazyk: angličtina
Zdroj: Journal of human evolution [J Hum Evol] 2018 Oct; Vol. 123, pp. 84-95. Date of Electronic Publication: 2018 Jul 26.
DOI: 10.1016/j.jhevol.2018.06.006
Abstrakt: The rate of change in primate mandibular symphyseal angles was modeled with particular aim of locating a rate-shift within the hominin clade. Prior work noted that the human symphyseal angle must have experienced a rapid rate of change in order to assume the modern human form, suggestive of the non-random work of natural selection. This study indicates that the rate of symphyseal evolution rose dramatically between Australopithecus anamensis and Australopithecus afarensis and continued throughout the diversification of the hominin clade. Noting the timing of this event, we speculate as to what ecological factors could have been at play in driving this rearrangement of the anterior mandible, contributing to the eventual appearance of the human chin.
(Copyright © 2018 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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