Mouthparts of insects pdf

This chapter describes the general mouthpart morphology of hexapoda, introduces basic feeding types in insects, and illustrates mouthpart. These similar mouthparts are an example of homologous organs. Each species is perfectly suited to its role, and their mouthparts have evolved in ways that allow them to effectively exploit their food sources. The structure and function of their mouthparts changed. Pdf theme and variation in the development of insect mouthparts. The mouthparts of a female mosquito are highly modified to form a proboscis that is adapted for piercing skin and sucking blood. Form and function of insect mouthparts request pdf. They surround the mouth and are external to it, unlike the condition in vertebrates in which the teeth are within the oral cavity. Insects are incredibly diverse organisms, and they fill a variety of niches in their respective ecosystems. The basic structure of mouthparts remains the same.

Mouthparts ent 425 general entomology nc state university. Major structural types of extant insect mouthparts are extensive, consisting of diverse variations in element structure within each of the five. These consist of the labrum forming upper lip, mandibles, first maxillae, second maxillae forming lower lip, hypo pharynx and the epipharynx. Moving from anterior to posterior these structures are. Insect mouthparts amateur entomologists society aes. The basic segmental character of the mouthparts is most apparent in insects that bite off fragments of food and then chew it before ingesting it fig. Abstract one of the most intensively examined and abundantly documented structures in the animal world is insect mouthparts. This is facilitated by the development of a sucking arrangement from the mouthparts. Males have similar mouthparts, but they feed only on nectar. Basal or generalized insect mouthparts consist of 5 basic structures. Major structural types of extant insect mouthparts are extensive, consisting of diverse variations in element structure within each of the five mouthpart regions. Pdf mouthparts of flowervisiting insects nikolaus u. Homometabolous insects have different types of mouthparts in their larvae and adult stages.

Different insects have adapted themselves to different modes of ingestion of food. Insect mouthparts an overview sciencedirect topics. This type of mouth parts are supposed to be the most primitive type as the other types are believed to be evolved. Mouthparts of insects are modified cephalic appendages.

This type of mouth parts are supposed to be the most primitive type as the other types are believed to be evolved from biting and chewing type of mouth parts. The mouthparts of insects are structures surrounding the mouth that are involved in the mechanics of feeding and processing and manipulating the food so that it can be ingested. In fact, an insect s mouth is one of its defining features. Mouth parts in insects with diagram biology discussion. Derived brachycera larvae in the cyclorrhapha have highly modified mouthparts in which the typical mouthparts are lost or fused. Chapman, in encyclopedia of insects second edition, 2009. Structure and function of mouthparts biology courses. It surrounds six slender, sclerotized stylets that. As insects evolved, they became more complex, expanded in range, and adapted to new food resources. Ent 425 general entomology resource library tutorials. Insect mouth parts show many cases of parallel evolution, the same end being independently achieved along similar, but not identical lines. Learn more insect mouthparts and how they are perfectly. The proboscis is similar to a sword within a scabbard.