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Related Concept Videos

Evolution of New Traits in Microbes01:24

Evolution of New Traits in Microbes

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Systematic Assessment of Mammalian Skull Specimens for Dental and Temporomandibular Joint Pathology
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A modular framework characterizes micro- and macroevolution of old world monkey dentitions.

Theresa M Grieco1, Oliver T Rizk, Leslea J Hlusko

  • 1Department of Integrative Biology, University of California, Berkeley, CA 94720, USA.

Evolution; International Journal of Organic Evolution
|January 8, 2013
PubMed
Summary
This summary is machine-generated.

Evolutionary developmental biology reveals modularity in primate dentition. This study identifies distinct tooth modules in Old World monkeys, linking developmental processes to evolutionary patterns in dental morphology.

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Area of Science:

  • Evolutionary biology
  • Developmental biology
  • Paleontology

Background:

  • Modularity is crucial for integrating developmental processes into phenotypic evolution.
  • The primate dentition is an ideal model for studying modularity due to its developmental simplicity, adaptive significance, and fossil record.

Purpose of the Study:

  • To test hypotheses about genetic modularity using phenotypic variation in primate dentition.
  • To assess the macroevolutionary extent of dental modularity across Old World monkeys (OWMs).

Main Methods:

  • Quantitative genetic analysis of baboon dental size variation.
  • Analysis of covariation in dentitions of six OWM species using linear tooth size and geometric morphometrics (GM) of tooth row shape.

Main Results:

  • A genetic modular framework corresponding to tooth type categories was identified in baboon dentition.
  • OWMs exhibit a macroevolutionary framework of anterior and postcanine dental modules, with submodularity between molars and premolars for both size and shape.
  • Results suggest early developmental processes influence adult dental variation in OWMs.

Conclusions:

  • Dental modularity in OWMs is influenced by developmental processes like odontogenesis and jaw patterning.
  • This study compares genotypic and phenotypic modules, offering insights into their evolutionary dynamics across different timescales.