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Updated: Jun 16, 2025

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The Molecular Substrates of Insect Eusociality.

Sarah Kocher1, Callum Kingwell2,1

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Summary
This summary is machine-generated.

Eusociality in bees, ants, and wasps evolved multiple times. Convergent molecular pathways, like IIS and TOR signaling, underpin social behaviors, offering insights into complex insect life histories.

Keywords:
caste developmentepigeneticseusocialityevolutiongenomicsneurobiologysocial insects

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Area of Science:

  • Evolutionary biology
  • Molecular biology
  • Behavioral ecology

Background:

  • Hymenoptera (bees, ants, wasps) exhibit frequent gains and losses of eusociality, making them a key model for studying social behavior evolution.
  • Understanding the molecular mechanisms driving social complexity is crucial for evolutionary biology.

Purpose of the Study:

  • To synthesize current knowledge on the evolutionary history and molecular underpinnings of eusociality in Hymenoptera.
  • To review evidence for evolutionary hypotheses and identify conserved molecular pathways regulating social behaviors.

Main Methods:

  • Literature review synthesizing evolutionary hypotheses and molecular pathway data.
  • Analysis of convergent evolution in signaling pathways related to social behavior.
  • Examination of nutrient-sensing and endocrine pathways involved in social insect physiology.

Main Results:

  • Convergent evolution has shaped a common molecular toolkit for sociality, including insulin/insulin-like growth factor signaling (IIS), target of rapamycin (TOR), juvenile hormone, and ecdysteroid signaling.
  • Epigenetic regulation plays a significant role in mediating social behaviors.
  • Crosstalk among these pathways allows social insects to integrate environmental and physiological cues.

Conclusions:

  • Social insect evolution is characterized by convergent molecular pathways that enable complex social behaviors.
  • Viewing these pathways as an integrated regulatory circuit offers a framework for understanding the evolution of complex life histories in social insects.