Quick facts for kidsStoneflies
Temporal range: Permian - Recent
|Adult of genus Eusthenia|
The Stonefly or Plecoptera' are an order of aquatic insects. There are some 3,500 described species worldwide, and new ones are still being discovered. Although stoneflies are found worldwide, they are absent from Antarctica. Stoneflies are believed to be one of the most primitive groups of Neoptera. Their close relatives are identified from the Carboniferous and Lower Permian geological periods. True stoneflies, known from fossils, are only a little younger.
They need fast moving water in streams and rivers to survive. They cannot tolerate the low oxygen saturation found in warm water. They usually live in cold clean streams with a lot of turbulence (such as rapids).
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Stonefly Facts for Kids. Kiddle Encyclopedia.