Microcoryphia is an order of small, wingless insects commonly known as bristletails. They are characterized by their elongated bodies, large compound eyes, and long antennae. These insects are primarily found in moist environments, such as leaf litter and under stones, where they feed on organic matter. Bristletails are notable for their unique reproductive behavior and life cycle. They undergo a simple metamorphosis, meaning they do not have a pupal stage. Instead, they grow through a series of molts, gradually increasing in size. Microcoryphia is often studied for its evolutionary significance, as it is one of the most primitive groups of insects.