Breaking the rules: Phylogeny, not life history, explains dental eruption sequence in primates

American Journal of Physical Anthropology
Tesla A Monson, Leslea J Hlusko

Abstract

Although a great deal is known about the biology of tooth development and eruption, there remains disagreement about the factors driving the evolution of dental eruption sequence. We assessed postcanine eruption sequence across a large sample of primates to test two hypotheses: (1) Dental eruption sequence is significantly correlated with life history and body size variables that capture postnatal growth and longevity (Schultz's Rule), and (2) Dental eruption sequence is conserved phylogenetically. We assessed postcanine dental eruption sequence for 194 individuals representing 21 primate genera spanning eight families. With the inclusion of an additional 29 primate genera from the literature, this is the most comprehensive report on dental eruption sequence in primates to date. We used a series of phylogenetic analyses to statistically compare dental eruption sequence to life history and body size and test for phylogenetic signal in these traits. Dental eruption sequence is conserved phylogenetically in primates, and body and brain size are both significantly associated with dental eruption sequence. Ancestral state reconstruction supports the hypothesis that the third molar erupted before one or more of the premolars in the a...Continue Reading

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Citations

Oct 14, 2018·The Anatomical Record : Advances in Integrative Anatomy and Evolutionary Biology·Tesla A MonsonLeslea J Hlusko
Apr 10, 2019·Proceedings. Biological Sciences·Helder Gomes RodriguesJean-Renaud Boisserie
Mar 29, 2020·The Anatomical Record : Advances in Integrative Anatomy and Evolutionary Biology·Tesla A Monson
Dec 6, 2019·The Anatomical Record : Advances in Integrative Anatomy and Evolutionary Biology·Kelsey PaddockTimothy D Smith
Oct 7, 2020·Proceedings of the National Academy of Sciences of the United States of America·Tesla A MonsonMarc Scherrer
Mar 21, 2021·Evolution; International Journal of Organic Evolution·Diego A EsquivelSharlene E Santana
Jul 27, 2021·American Journal of Physical Anthropology·Sean M LeeGottfried Hohmann
Oct 7, 2021·Science Advances·Halszka Glowacka, Gary T Schwartz

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