Evidence of strong stabilizing effects on the evolution of boreoeutherian (Mammalia) dental proportions.

Autor: Monson TA; Department of Integrative Biology University of California Berkeley California.; Human Evolution Research Center University of California Berkeley California.; Museum of Vertebrate Zoology University of California Berkeley California.; Anthropologisches Institut und Museum Universität Zürich Zürich Switzerland., Boisserie JR; PALEVOPRIM, CNRS & Université de Poitiers POITIERS Cedex 9 France., Brasil MF; Department of Integrative Biology University of California Berkeley California.; Human Evolution Research Center University of California Berkeley California., Clay SM; Department of Integrative Biology University of California Berkeley California.; Department of Human Genetics University of Chicago Chicago Illinois., Dvoretzky R; Department of Integrative Biology University of California Berkeley California., Ravindramurthy S; Department of Integrative Biology University of California Berkeley California., Schmitt CA; Department of Anthropology and Biology Boston University Boston Massachusetts., Souron A; UMR 5199 PACEA Université de Bordeaux PESSAC France., Takenaka R; Department of Integrative Biology University of California Berkeley California.; Museum of Vertebrate Zoology University of California Berkeley California., Ungar PS; Department of Anthropology University of Arkansas Fayetteville Arkansas., Yoo S; Department of Integrative Biology University of California Berkeley California., Zhou M; Department of Integrative Biology University of California Berkeley California., Zuercher ME; Department of Integrative Biology University of California Berkeley California., Hlusko LJ; Department of Integrative Biology University of California Berkeley California.; Human Evolution Research Center University of California Berkeley California.; Museum of Vertebrate Zoology University of California Berkeley California.
Jazyk: angličtina
Zdroj: Ecology and evolution [Ecol Evol] 2019 Jun 14; Vol. 9 (13), pp. 7597-7612. Date of Electronic Publication: 2019 Jun 14 (Print Publication: 2019).
DOI: 10.1002/ece3.5309
Abstrakt: The dentition is an extremely important organ in mammals with variation in timing and sequence of eruption, crown morphology, and tooth size enabling a range of behavioral, dietary, and functional adaptations across the class. Within this suite of variable mammalian dental phenotypes, relative sizes of teeth reflect variation in the underlying genetic and developmental mechanisms. Two ratios of postcanine tooth lengths capture the relative size of premolars to molars (premolar-molar module, PMM), and among the three molars (molar module component, MMC), and are known to be heritable, independent of body size, and to vary significantly across primates. Here, we explore how these dental traits vary across mammals more broadly, focusing on terrestrial taxa in the clade of Boreoeutheria (Euarchontoglires and Laurasiatheria). We measured the postcanine teeth of N  = 1,523 boreoeutherian mammals spanning six orders, 14 families, 36 genera, and 49 species to test hypotheses about associations between dental proportions and phylogenetic relatedness, diet, and life history in mammals. Boreoeutherian postcanine dental proportions sampled in this study carry conserved phylogenetic signal and are not associated with variation in diet. The incorporation of paleontological data provides further evidence that dental proportions may be slower to change than is dietary specialization. These results have implications for our understanding of dental variation and dietary adaptation in mammals.
Competing Interests: None declared.
Databáze: MEDLINE
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