For educational purposes:--
Information on the basics of Entomology
An Introduction To The Study of Entomology 1
Kingdom: Animalia, Phylum: Arthropoda
Subphylum: Hexapoda: Class: Insecta: Order: Thysanura
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The Apteragota presently contains only one order, Thysanura -- <Adults> & <Juveniles> --, while the Protura, Diplura and Collembola have been moved to a separate class Entognatha. The Thysanura are known as silverfish, bristletails and firebrats. There are over 310 species of these tiny insects known worldwide. The name "silverfish" comes from the fact that they are covered with scales that cast a silvery hue and from their undulating movements. The name "firebrat" refers to different species that congregate around ovens and are often called "little oven birds. These prefer high temperatures of 98-deg. Fahrenheit.
Their mating habits are peculiar. The males drop a spermatophore during a "mating dance." The female then picks up the spermatophore from the substrate.
Molting. -- These insects may molt more than 41 times. After the 8th molt the sexes are distinguishable. Molting continues after the eggs are laid, which occurs after the 36th molt.
Longevity. -- Their longevity is about three years.
Legs. -- Their legs are modified to withstand surfaces with high temperatures. Their tarsi are "heat resistant." However, they are handicapped by not being able to cling to smooth surfaces. They also are fast runners and the only Insect order with a remnant of abdominal legs.
Economic Importance. -- Thysanura are able to digest rayon and other wood products, just as are the Isoptera (termites). Mostly they consume dead organic matter, such as materials that contain starch, e.g., books, bindings, and wallpaper paste.).
Examples of beneficial species occur in almost every insect order, and considerable information on morphology and habits has been assembled. Therefore, the principal groups of insect parasitoids and predators provide details that refer to the entire class Insecta. These details are available at <taxnames.htm>.