Nymphs and adults of Lygaeus turcicus, Hemiptera

Hemimetabolism or hemimetaboly, also called partial metamorphosis and paurometabolism,[1] is the mode of development of certain insects that includes three distinct stages: the egg, nymph, and the adult stage, or imago. These groups go through gradual changes; there is no pupal stage. The nymph often has a thin exoskeleton and resembles the adult stage but lacks wings and functional reproductive organs.[2] The hemimetabolous insects differ from ametabolous taxa in that the one and only adult instar undergoes no further moulting.[3]

  1. ^ McGavin, George C. Essential Entomology: An Order-by-Order Introduction. Oxford: Oxford University Press, 2001. pp. 20.
  2. ^ Baluch, Page (April 29, 2011). "Incomplete Metamorphosis Has Three Stages: Egg, Nymph, and Adult". ASU - Ask A Biologist. Arizona State University School of Life Sciences Ask A Biologist. Retrieved 2 September 2019.
  3. ^ Gullan, P. J.; Cranston, P. S. (2014). The Insects: An Outline of Entomology (5th ed.). John Wiley & Sons, Ltd. p. 241.

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