Zygentoma

Zygentoma is an order of wingless insects that includes silverfish and firebrats. Its members have three long tail-like appendages and develop without metamorphosis.

Silverfish: Silverfish are small, wingless insects with flattened bodies and three tail-like appendages. They are the best-known members of Zygentoma and exemplify its characteristic body plan.
Insect ecdysis: Insect ecdysis is the shedding of an old cuticle to permit growth and formation of a new one. Zygentomans continue molting after maturity, unlike most insects.
Integrated pest management: Integrated pest management combines monitoring, prevention, and targeted controls to limit pest damage. It offers a measured approach to controlling silverfish and firebrats indoors.
Archaeognatha: Archaeognatha is an order of primitively wingless insects with a strongly arched body and jumping ability. It is Zygentoma's closest living insect-order comparison among primitively wingless lineages.
Firebrat: The firebrat is a wingless insect adapted to warm, dry habitats and closely related to silverfish. It is the other familiar household representative of the order.
Insect cuticle: The insect cuticle is the external chitin-containing covering that supports and protects the body. Repeated cuticle formation underlies the order's lifelong growth by molting.
Booklice: Booklice are tiny insects that feed on microscopic mold and organic residues in damp environments. They are often mistaken for silverfish but belong to a different insect order.
Pterygota: Pterygota is the clade comprising insects whose ancestors evolved wings. Unlike pterygotans, Zygentoma has no winged members.
Ametabolism: Ametabolism is development in which juveniles resemble adults and there is no metamorphic transformation. Zygentomans grow through successive molts without a distinct larval or pupal stage.
Negative phototaxis: Negative phototaxis is movement away from a source of light. Many household silverfish retreat from light into dark crevices.

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