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insect mouthparts
Insects exhibit a range of mouthparts, adapted to particular modes of feeding. The earliest insects had chewing mouthparts. Specialization has mostly been for piercing and sucking, although a range of specializations exist, as these modes of feeding have evolved a number of times (for example, mosquitoes (which are flies) and aphids (which are true bugs) both pierce and suck, however female mosquitoes feed on animal blood whereas aphids feed on plant fluids). In this page, the individual mouthparts are introduced for chewing insects. Specializations are generally described thereafter.
==Evolution==
Like most external features of arthropods, the mouthparts of hexapoda are highly derived. Insect mouthparts show a multitude of different functional mechanisms across the wide diversity of species considered insects. Significant homology is conserved, with structures being formed from the same basal cell lines, and having the same evolutionary origin. On the other hand, even analogous structures may not share true homology, and are only easily comparable due to convergent evolution.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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