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| | Insect flight Information (Site not responding. Last check: ) |
 | | This mechanism evolved once, and is the defining feature (synapomorphy) for the infraclass Neoptera; it corresponds, probably not coincidentally, with the appearance of a wing-folding mechanism, which allows Neopteran insects to fold the wings back over the abdomen when at rest (though this ability has been lost secondarily in some groups, such as all butterflies). |
 | | What all Neoptera share, though, is the way the muscles in the thorax work: the muscles, rather than attaching to the wings, attach to the thorax and deform it; since the wings are extensions of the thoracic exoskeleton, the deformations of the thorax cause the wings to move, as well. |
 | | The overall effect is that many higher Neoptera can hover, fly backwards, and perform other feats involving a degree of fine control that insects with direct flight muscles cannot achieve. |
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