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Phylogenomics resolves the timing and pattern of insect evolution.

Bernhard Misof1, Shanlin Liu2, Karen Meusemann3

  • 1Zoologisches Forschungsmuseum Alexander Koenig (ZFMK)/Zentrum für Molekulare Biodiversitätsforschung (ZMB), Bonn, Germany. xinzhou@genomics.cn b.misof.zfmk@uni-bonn.de kjer@aesop.rutgers.edu wangj@genomics.cn.

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Summary
This summary is machine-generated.

This study resolves insect evolutionary history using 1478 genes, revealing insect origins ~479 million years ago and major lineage diversification during the Mississippian period.

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Area of Science:

  • Zoology
  • Evolutionary Biology
  • Genomics

Background:

  • Insects represent the most diverse animal group, yet their evolutionary relationships are not fully understood.
  • Resolving insect phylogeny is crucial for understanding the evolution of biodiversity.

Purpose of the Study:

  • To reconstruct the evolutionary history of insects using a large-scale phylogenomic approach.
  • To establish a robust phylogenetic framework for insects and date key evolutionary events.

Main Methods:

  • Phylogenomic analysis of 1478 protein-coding genes from insect genomes.
  • Utilized nucleotide and amino acid sequence data with advanced substitution models.
  • Employed site-specific nucleotide or domain-specific amino acid substitution models for robust inference.

Main Results:

  • Generated a statistically robust and congruent insect phylogeny, resolving previous controversies.
  • Dated the origin of insects to the Early Ordovician (~479 million years ago).
  • Dated insect flight to the Early Devonian (~406 Ma), major extant lineages to the Mississippian (~345 Ma), and holometabolous insect diversification to the Early Cretaceous.

Conclusions:

  • The study provides a reliable phylogenetic scaffold for insects.
  • This framework will facilitate future comparative analyses of insect evolutionary innovations.
  • The resolved phylogeny clarifies the timing of major insect evolutionary events.