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The subphylum Hexapoda (from Greek for 'six legs') or hexapods comprises the largest clade of arthropods and includes most of the extant arthropod species. It includes the crown group class Insecta (true insects), as well as the much smaller clade Entognatha, which includes three classes of wingless arthropods that were once considered insects: Collembola (springtails), Protura (coneheads) and ...
The Entognatha are a class of wingless and ametabolous arthropods, which, together with the insects, makes up the subphylum Hexapoda. [1] [2] Their mouthparts are entognathous, meaning that they are retracted within the head, unlike the insects. [1] Entognatha are apterous, meaning that they lack wings.
Order Strepsiptera – 596 (Twisted-wing parasites) Order Coleoptera – 360,000–400,000 (Beetles) Order †Glosselytrodea; Order Raphidioptera – 210 (Snakeflies) Order Megaloptera – 250–300 (Alderflies, dobsonflies, and fishflies) Order Neuroptera – 5,000 (Net-winged insects) Order †Protomecoptera; Order †Tarachoptera; Order ...
[116] [117] Most insects gain aerodynamic lift by creating a spiralling vortex at the leading edge of the wings. [118] Small insects like thrips with tiny feathery wings gain lift using the clap and fling mechanism; the wings are clapped together and pulled apart, flinging vortices into the air at the leading edges and at the wingtips. [119] [120]
Proturans have no eyes, wings, or antennae, and, lacking pigmentation, are usually whitish or pale brown.The sensory function of the absent antennae is fulfilled by the first pair of the three pairs of five-segmented legs, which are held up, pointing forward, and bearing numerous tarsal sensilla and sensory hairs.
Pancrustacea is the clade that comprises all crustaceans and all hexapods (insects and relatives). [2] This grouping is contrary to the Atelocerata hypothesis, in which Hexapoda and Myriapoda are sister taxa, and Crustacea are only more distantly related.
It holds the head, legs, wings and abdomen. It is also called mesosoma or cephalothorax in other arthropods. It is formed by the prothorax , mesothorax and metathorax and comprises the scutellum ; the cervix , a membrane that separates the head from the thorax; and the pleuron , a lateral sclerite of the thorax.
Articles related to the Hexapoda, the subphylum which comprises most species of arthropods and includes the insects as well as three much smaller groups of wingless arthropods: Collembola, Protura, and Diplura (all of these were once considered insects).