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Increasing control over biomineralization in conodont evolution.

Bryan Shirley1,2, Isabella Leonhard3,4, Duncan J E Murdock5

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This summary is machine-generated.

The evolution of early vertebrate teeth in conodonts shows increased crystallographic order and adaptation for food processing. This suggests enhanced biomineralization control in the first vertebrates.

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Area of Science:

  • Paleontology
  • Biomineralization
  • Evolutionary Biology

Background:

  • Vertebrates utilize apatite in skeletal tissues like enamel, known for hardness and elasticity.
  • The evolution of early vertebrate skeletal tissues in conodonts is hypothesized to be linked to dental function.

Purpose of the Study:

  • To quantitatively test the hypothesis that conodont dental evolution was driven by adaptation to food processing.
  • To investigate the relationship between crystallographic order and morphological adaptation in conodont teeth.

Main Methods:

  • Quantitative analysis of apatite crystal orientation in conodont teeth.
  • Morphological analysis of conodont denticles related to feeding function.
  • Assessment of material properties under uniaxial compressional stress.

Main Results:

  • Crystallographic order in conodont teeth increased during early evolution, paralleling morphological adaptations for food processing.
  • Apatite crystal c-axes oriented perpendicular to feeding surfaces enhance resistance to compressional stress.
  • Demonstrated increasing control over biomineralization in early skeletonized vertebrates.

Conclusions:

  • The findings support the role of functional adaptation in the evolution of early vertebrate biomineralization.
  • Results enable testing of functional morphology and material property models across conodont dental diversity.