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Evolution: pollen or pollinators - which came first?

Simone C Cappellari1, Hanno Schaefer, Charles C Davis

  • 1Department of Organismic and Evolutionary Biology, Harvard University Herbaria, 22 Divinity Avenue, Cambridge, MA 02138, USA.

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Summary
This summary is machine-generated.

This study reveals the first broad timeline of bee evolution, identifying ancient bee groups with scarce fossil records. Bee diversification appears to align with the rise of flowering plants, specifically eudicots.

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Area of Science:

  • Evolutionary Biology
  • Paleontology
  • Botany

Background:

  • Understanding bee diversification is crucial for ecological studies.
  • The fossil record for early bees is sparse, making evolutionary history challenging to reconstruct.
  • The co-evolutionary relationship between bees and flowering plants is a key area of research.

Purpose of the Study:

  • To establish the first comprehensive timeline of bee diversification.
  • To identify ancient bee lineages, including those with limited fossil evidence (ghost lineages).
  • To investigate the temporal correlation between bee diversification and the evolution of flowering plants.

Main Methods:

  • Phylogenetic analysis of existing bee genetic data.
  • Molecular clock dating to estimate divergence times.
  • Comparison of inferred bee diversification timelines with plant evolutionary history, particularly the rise of angiosperms.

Main Results:

  • The study presents a broad timeline for bee diversification, spanning millions of years.
  • Several ancient bee clades were identified as 'ghost lineages' due to minimal fossil representation.
  • The diversification of bees shows a notable temporal overlap with the diversification of the major flowering plant clade, the eudicots.

Conclusions:

  • This research provides a foundational timeline for understanding bee evolutionary history.
  • The findings suggest that the diversification of bees was closely linked to the radiation of eudicots.
  • Future research can build upon this timeline to explore specific co-evolutionary dynamics between bees and plants.