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*as of ‘24 SEPTEMBER 2023’*
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-the entognatha are a class of ‘wing-less (aka ‘ametabolous) arthropods’, which – together with the ‘insects’ – makes up the sub-phylum “hexapoda”-
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Their mouthparts are entognathous, meaning that they are retracted within the head.
Entognatha are apterous, meaning that they lack wings.
The class contains three orders: Collembola (springtails), Diplura and Protura.
These three groups were historically united with the order Thysanura to form the class Apterygota, but it has since been recognized that the hexapodous condition of these animals has evolved independently from that of insects, and independently within each order.
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(the orders may not be closely related, in which case “entognatha” would be a polyphyletic group)
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