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Piercing mouthparts
- Among insects, the rostrum is the name for the piercing mouthparts of the order Hemiptera as well as those of the snow scorpionflies, among many others. The long snout of weevils is also called a rostrum.
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Rostrum (from Latin rostrum, meaning beak) is a term used in anatomy for several kinds of hard, beak-like structures projecting out from the head or mouth of an animal. Despite some visual similarity, many of these are phylogenetically unrelated structures in widely varying species.
The rostrum is a snout-like projection from the heads of some insects or the carapace of some crustaceans. Weevils often possess a large rostrum and their mouth parts are located at the very tip.
Insects have mouthparts that may vary greatly across insect species, as they are adapted to particular modes of feeding. The earliest insects had chewing mouthparts. Most specialisation of mouthparts are for piercing and sucking, and this mode of feeding has evolved a number of times independently.
Apr 20, 2020 · In insects, the posterior expanded part of the hindgut, typically pear shaped. Reticulate. Covered with a network pattern. Reproductives. In termites the caste of kings and queens in other social insects only the queens. Rostrum. A beak or snout, applied especially to the piercing mouth-parts of bugs and the elongated snouts of weevils ...
The proboscis is fleshy, elbowed, retractile and projects downwards from head. The proboscis can be differentiated into basal rostrum and distal haustellum. The proboscis consists of labium which is grooved on its anterior surface.
Insect morphology is the study and description of the physical form of insects. The terminology used to describe insects is similar to that used for other arthropods due to their shared evolutionary history.
Six or seven segments are condensed to form the head capsule. This strong structure provides protection for the brain, support for eyes, ocelli, antennae and mouthparts. The strongest muscles in the head serve the mandibles in chewing insects and the sucking pump in piercing-sucking insects.
