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Insect Morphology and SystematicsInsect Morphology and SystematicsHAUSTELLATE MOUTH PARTS
Haustellate
mouthparts are primarily used for sucking liquids and can be broken down into two
subgroups: those that possess stylets and those that do not.
Stylets
are needle-like projections
used to penetrate plant and animal tissue. The modified
mandibles, maxilla, and hypopharynx form the stylets
and the feeding tube. After piercing solid tissue, insects
use the modified mouthparts to suck liquids from the
host. Some haustellate mouthparts lack stylets. Unable
to pierce tissues, these insects must rely on easily
accessible food sources such as nectar at the base of a
flower. One example of nonstylate mouthparts are the
long siphoning proboscis of butterflies and moths
(Lepidoptera). Although the method of liquid transport
differs from that of the a Lepidopteran proboscis, the rasping-sucking rostrum of some flies are
also considered to be haustellate without stylets.
Insect Morphology and Systematics
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