How Many Species of Insects and Other Terrestrial Arthropods Are There on Earth?

  title={How Many Species of Insects and Other Terrestrial Arthropods Are There on Earth?},
  author={Nigel E. Stork},
  journal={Annual review of entomology},
  • N. Stork
  • Published 11 January 2018
  • Biology, Environmental Science
  • Annual review of entomology
In the last decade, new methods of estimating global species richness have been developed and existing ones improved through the use of more appropriate statistical tools and new data. Taking the mean of most of these new estimates indicates that globally there are approximately 1.5 million, 5.5 million, and 7 million species of beetles, insects, and terrestrial arthropods, respectively. Previous estimates of 30 million species or more based on the host specificity of insects to plants now seem… 

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