The predecessors of silverfish, along with those of jumping bristletails, are considered the earliest and most primitive insects. They evolved at the latest in mid-Devonian and possibly as early as late Silurian more than 400 million years ago. Some fossilized arthropod trackways from the Paleozoic Era, known as Stiaria intermedia and often attributed to jumping bristletails, may have been produced by silverfish.
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