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Related Experiment Videos

Evolution and development of teeth.

M McCollum1, P T Sharpe

  • 1Department of Anatomy, Case Western Reserve University, Cleveland, Ohio, USA.

Journal of Anatomy
|August 29, 2001
PubMed
Summary
This summary is machine-generated.

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This review explores how mammalian tooth development insights can illuminate the independent evolution of teeth and jaws in vertebrates. Understanding genetic interactions reveals the evolutionary history of dentition.

Area of Science:

  • Paleontology
  • Developmental Biology
  • Evolutionary Biology

Background:

  • Teeth and jaws are functionally linked in the oral cavity, but fossil evidence suggests mineralized structures resembling teeth existed before jaws.
  • Skin and pharyngeal denticles are found in various fossil and extant fish, with complex dentine and enamel structures in early jawless vertebrates (conodonts).
  • These findings suggest teeth and jaws may have evolved independently.

Purpose of the Study:

  • To review current knowledge of mammalian tooth development.
  • To investigate how developmental biology can inform the evolution of dentition.
  • To explore the independent evolution of teeth and jaws.

Main Methods:

  • Review of existing literature on mammalian tooth development.

Related Experiment Videos

  • Analysis of fossil evidence for early vertebrate dentition and jaws.
  • Integration of developmental genetics with paleontological data.

    • Main Results:

    • Significant advancements in understanding the genetic control of tooth initiation, morphogenesis, and patterning in mammals.
    • Fossil evidence indicates the presence of tooth-like structures predating jaws.
    • Complex dental structures in early jawless vertebrates provide clues to early tooth evolution.

    Conclusions:

    • Mammalian tooth development provides a framework for understanding the evolution of complex dental structures.
    • The independent evolution of teeth and jaws is supported by both fossil and developmental evidence.
    • Further research integrating developmental biology and paleontology can refine our understanding of vertebrate oral evolution.