stonefly imago and adult specimen

navigate by keyword : apparently aquatic arthropoda being believed benthic bit carboniferous cerci close commonly described discovered diversity fly fossils found geological groups however identified insect insects known larva larvae lower mesozoic modern most neoptera new only order origin periods permian plecoptera primitive relatives some species stoneflies stonefly subadult their true while worldwide young younger

The Plecoptera are an order of insects, commonly known as stoneflies. Some 3,500 species are described worldwide, with new species still being discovered. Stoneflies are found worldwide, except Antarctica. Stoneflies are believed to be one of the most primitive groups of Neoptera, with close relatives identified from the Carboniferous and Lower Permian geological periods, while true stoneflies are known from fossils only a bit younger. Their modern diversity, however, apparently is of Mesozoic origin.[