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Which arthropod group includes insects and springtails?

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Illustration showing a variety of adult insects, each labeled with its common name and order, including walkingstick, earwig, stonefly, tree cricket, dragonfly, female scale, cat flea, thrips, sucking louse, thysanuran, ant, scarab beetle, stinkbug, mosquito, and cabbage butterfly, highlighting their diverse shapes and sizes. — insect An illustration of insect diversity.

Insects and springtails are both included in the arthropod subphylum Hexapoda.12

While insects are classified within the class Insecta, the classification of springtails (order Collembola) can vary depending on the scientific scheme used. Some systems categorize springtails as true insects, while others place them in a separate, closely related group known as the class Parainsecta. In some taxonomic treatments, springtails are even treated as a distinct class separate from Insecta.34