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Which animals belong to the Hexapoda subphylum?

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A spiny lobster (Palinurus elephas) with long, striped antennae and spiny body stands on sandy ground near a rocky crevice underwater. — arthropod Spiny lobster, or rock lobster (*Palinurus elephas*).

The subphylum Hexapoda primarily includes insects and springtails.1

Within this subphylum, the classification is divided into two main groups:
* Class Insecta: This group is characterized by a body composed of a head, thorax, and abdomen, with three pairs of legs and typically two pairs of wings in the adult stage.2
* Class Entognatha: This class includes hexapods that are distinguished by having their mouthparts retracted within the head.2