Brief communication: dental development and enamel thickness in the Lakonis Neanderthal molar

American Journal of Physical Anthropology
Tanya M SmithEleni Panagopoulou

Abstract

Developmental and structural affinities between modern human and Neanderthal dental remains continue to be a subject of debate as well as their utility for informing assessments of life history and taxonomy. Excavation of the Middle Paleolithic cave site Lakonis in southern Greece has yielded a lower third molar (LKH 1). Here, we detail the crown development and enamel thickness of the distal cusps of the LKH 1 specimen, which has been classified as a Neanderthal based on the presence of an anterior fovea and mid-trigonid crest. Crown formation was determined using standard histological techniques, and enamel thickness was measured from a virtual plane of section. Developmental differences include thinner cuspal enamel and a lower periodicity than modern humans. Crown formation in the LKH 1 hypoconid is estimated to be 2.6-2.7 years, which is shorter than modern human times. The LKH 1 hypoconid also shows a more rapid overall crown extension rate than modern humans. Relative enamel thickness was approximately half that of a modern human sample mean; enamel on the distal cusps of modern human third molars is extremely thick in absolute and relative terms. These findings are consistent with recent studies that demonstrate differe...Continue Reading

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Citations

Mar 6, 2012·Human Nature : an Interdisciplinary Biosocial Perspective·Jennifer L Thompson, Andrew J Nelson
Nov 17, 2010·Proceedings of the National Academy of Sciences of the United States of America·Tanya M SmithJean-Jacques Hublin
Feb 12, 2013·Journal of Human Evolution·Wioletta NowaczewskaMikołaj Urbanowski
Dec 3, 2010·Journal of Human Evolution·Katerina HarvatiPanagiotis Karkanas
Jun 6, 2013·American Journal of Physical Anthropology·Leslea J HluskoAlban Defleur
May 31, 2015·Journal of Human Evolution·Matthew M SkinnerJean-Jacques Hublin
Mar 1, 2012·Journal of Human Evolution·Tanya M SmithJean-Jacques Hublin
Oct 6, 2014·Journal of Human Evolution·Cinzia FornaiGerhard W Weber
May 15, 2016·Journal of Human Evolution·Tanya M Smith
Aug 20, 2010·Journal of Human Evolution·Kornelius Kupczik, Jean-Jacques Hublin
Oct 12, 2010·Journal of Human Evolution·Isabelle CrevecoeurPatrick Semal
Sep 11, 2014·Journal of Applied Clinical Medical Physics·Guangyan DongHongkun Wu
Jun 26, 2012·American Journal of Physical Anthropology·Gary D RichardsAlastair A MacDowell

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