Allometry, merism, and tooth shape of the lower second deciduous molar and first permanent molar

American Journal of Physical Anthropology
Shara E BaileyJ-J Hublin

Abstract

This study investigates the effect of allometry on the shape of lower dm2 (dm2) and lower M1 (M1) crown outlines and examines whether the trajectory and magnitude of allometric scaling are shared between Neandertals and Homo sapiens. Our sample included 164 specimens: 57 recent H. sapiens, 44 Upper Paleolithic H. sapiens, 17 early H. sapiens, and 46 Neandertals. Of these, 59 represent dm2/M1 pairs from the same individuals. Occlusal photographs were used to obtain crown shapes of dm2s and M1s. Principal components analysis (PCA) of the matrix of shape coordinates was used to explore the pattern of morphological variation across the dm2 and M1 samples. Allometry was investigated by means of the Pearson product-moment correlation coefficient. Two-block partial least squares (2B-PLS) analysis was used to explore patterns of covariation between dm2 and M1 crown outlines of matched individual pairs. The PCA confirmed significant differences between Neandertal and H. sapiens dm2 and M1 shapes. Allometry accounted for a small but statistically significant proportion of the total morphological variance. The magnitude of the allometric contribution to crown shape was stronger among Neandertals than among H. sapiens. However, we could no...Continue Reading

References

Aug 1, 1989·American Journal of Physical Anthropology·F Mallegni, A T Ronchitelli
Mar 1, 1971·American Journal of Physical Anthropology·S Molnar
Sep 1, 1984·American Journal of Physical Anthropology·J R Lukacs, S R Walimbe
Dec 1, 1982·American Journal of Physical Anthropology·D R SawyerA Mosadomi
Jan 1, 1982·Archives of Oral Biology·S R Saunders, J T Mayhall
Feb 1, 1997·American Journal of Physical Anthropology·P SmithJ Becker
Jun 23, 1999·Proceedings of the National Academy of Sciences of the United States of America·I Tattersall, J H Schwartz
Jul 16, 2002·Systematic Biology·F J Rohlf, M Corti
Mar 29, 2003·Journal of Human Evolution·Fred L BooksteinHorst Seidler
Nov 1, 1964·Archives of Oral Biology·C F MOORREES, R B REED
Jan 20, 2004·American Journal of Physical Anthropology·H M Liversidge, T Molleson
Sep 28, 2004·Journal of Anatomy·Shara E BaileyBernard A Wood
Jun 30, 2007·Journal of Human Evolution·A Gómez-RoblesL M Martínez
Dec 1, 2007·Journal of Human Evolution·Matthew M SkinnerJean-Jacques Hublin
Jan 16, 2008·Evolution; International Journal of Organic Evolution·Philipp Mitteroecker, Fred Bookstein
Jan 27, 2009·Journal of Human Evolution·Stefano BenazziGiorgio Gruppioni
Jan 15, 2011·The Anatomical Record : Advances in Integrative Anatomy and Evolutionary Biology·Michelle SingletonRob O'neill
Feb 9, 2011·American Journal of Physical Anthropology·Stefano BenazziOttmar Kullmer
Feb 12, 2011·American Journal of Physical Anthropology·Shara E BaileyJean-Jacques Hublin
Apr 11, 2012·Evolution; International Journal of Organic Evolution·Aida Gómez-Robles, P David Polly
Oct 19, 2012·American Journal of Physical Anthropology·Stefano BenazziAnnamaria Ronchitelli
Feb 1, 2014·American Journal of Physical Anthropology·Shara E BaileyJean-Jacques Hublin
Apr 18, 2015·Journal of Human Evolution·Katerina HarvatiChristopher S Henshilwood

❮ Previous
Next ❯

Citations

Oct 6, 2016·American Journal of Physical Anthropology·Julie ArnaudMarco Peresani
May 18, 2016·American Journal of Primatology·James E LoudonMatt Sponheimer
Jul 13, 2017·The Journal of Animal Ecology·David Outomuro, Frank Johansson
Feb 9, 2018·American Journal of Physical Anthropology·Hester HanegraefJosé María Bermúdez de Castro
Apr 4, 2017·American Journal of Physical Anthropology·José María Bermúdez de CastroWu Liu
Jul 12, 2017·Science Advances·Viviane SlonSvante Pääbo
Dec 9, 2020·American Journal of Physical Anthropology·Juliet K BrophyShara E Bailey

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.