Evolution of the insects

@inproceedings{Grimaldi2005EvolutionOT,
  title={Evolution of the insects},
  author={David A. Grimaldi and Michael S. Engel},
  year={2005}
}
Section 1. Diversity and Evolution: Introduction Species: their nature and number How many species of insects? Reconstructing evolutionary history Section 2. Fossil Insects: Insect fossilization Dating and ages Major fossil Insect deposits Section 3. Arthropods and the Origin of Insects: Onychophora: the velvet-worms Tardigrada: the water-bears Arthropoda: the jointed animals Hexapoda: the six-legged arthropods Section 4. The insects: Morphology of insects Relationships among the insect orders… Expand
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TLDR
Divergence times based on the 28S rDNA and several fossil constraints indicate that the Brachycera originated in the late Triassic or earliest Mesozoic and that all major lower brachyceran fly lineages had near contemporaneous origins in the mid-Jurassic prior to the origin of flowering plants. Expand