"The subphylum Hexapoda (from Greek for ´six legs´) comprises most species of arthropods and includes the insects as well as three much smaller groups of wingless ...
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arthropods: Collembola, Protura, and Diplura (all of these were once considered insects). The Collembola (or springtails) are very abundant in terrestrial environments. Hexapods are named for their most distinctive feature: a consolidated thorax with three pairs of legs (six legs). Most other arthropods have more than three pairs of legs." - (en.wikipedia.org 18.11.2021)
