Mandibles are absent. A pair of glossae is present between paraglossae. Most of the butterfly mouth is reduced and the parts don’t have a function anymore (in most butterflies). The insect releases it when needed for use, then withdraws and folds it back beneath the head when it is not needed. Nectar is then squeezed by galeae and is deposited in the cavity formed by the paraglossae. The stipes has five segmented maxillary palp on its outer side. It is below the butterfly's proboscis. Moths have feathery antennae. Which organelle is known as “power house” of the cell? In all “primitive” insects, the mouthparts are adapted for grinding, chewing, pinching, or crushing bits of solid food. Two sets of muscles move the mandibles in the coronal plane : abductor muscles move insects' mandibles apart ( laterally ); adductor muscles bring them together ( medially ). There are two first maxillae one on each side. The number of stylets varies with different insects. However, there are a few exceptions to this … The word "Lepidoptera" means "scaly wings" in Greek. enable_page_level_ads: true Proboscis has a food tube on its center wherein the nectar is siphoned by the butterflies. Ask your question. Moths also belong to this group. 5. Prestomial teeth are present on the undersurface of the labella. It takes liquid part of the material as food. Before sharing your knowledge on this site, please read the following pages: 1. Butterflies have segmented antennae with club-like ends. Mouthparts of insects are modified cephalic appendages. 1). Insect mouth parts show many cases of parallel evolution, the same end being independently achieved along similar, but not identical lines. Labrum helps in tasting and also handling the food. It is above the butterfly's proboscis. The maxillary palps and labium pre greatly reduced and degenerate and labial palps are well developed and jointed. Below are the features of the butterfly’s mouthpart: This liquefied food enters pseudotracheae by the capillary action upto the mouth via food channel. The tongue unit consists of the two galeae of maxillae, two labial Palps and an elongated flexible hairy glossa of labium. Share Your PPT File. A butterfly doesn't have a mouth. The labium bears a pair of lobes terminally called labella. The butterfly pupa is called a chrysalis, or chrysalid. The labrum bears gustatory sensilla on its inner surface. Only maxillary stylets and mandibular stylets are present in bugs, whereas labrum-epipharynx and hypopharynx along with maxillary stylets and mandibular stylets are also present in mosquitoes. (Someone else wondered if the word was really meant to be 'flutter-by' ). Also the larvae of mosquito, housefly butterfly and honeybee also have biting and chewing mouthparts. Immature butterflies do not develop these abilities yet but have chewing mouthparts instead, but when they grow into adults they develop into sucking mouthparts. Due to the sucking action of cibarium muscles and pharyngeal muscles, the nectar is sucked up. The mouthparts of butterfly and moths are siphoning and sucking type. The proboscis is hollow internally and remains coiled under head when not in use. Zoology, Practicals, Invertebrates, Butterfly, Head and Mouth Parts of Butterfly. Share Your Word File Our mission is to provide an online platform to help students to share notes in Biology. Antennae are formed and the chewing mouthparts of the caterpillar are transformed into the sucking mouthparts of the butterfly. Fig. The mouthparts are used for sucking nectar from flowers. These mouthparts are characterized by stylets which are long and pointed. larvae) The immature form of an insect that develops from an egg and eventually turns into a pupa. Haustellum and labellum are modified labium. Haustellum bears a theca underneath it. Write few points about the piercing and sucking mouthparts. This is a question and answer forum for students, teachers and general visitors for exchanging articles, answers and notes. Pre-mentum is formed by the fusion of two stipes and it bears a small sclerite called palpiger. One of its first jobs as an adult butterfly is to assemble its mouthparts. Phylum Arthropoda: Insect mouthparts (Butterfly, cockroach, housefly, honey bee, Mosquito). We have loaded Previous years questions with explanations...for all competitive exams. Proboscis: The proboscis of the honeybee is not a permanent functional organ, but it is formed temporarily by assembling parts of the maxillae and the labium to produce a unique tube for drawing up liquids such as sweet juices, nectar, water and honey. 09 of 11 4. This article will focus on four commonly encountered types of mouthparts: chewing, piercing-sucking, siphoning, and rasping. All pseudotracheae of both labella converge into the preoral opening. The proboscis is divisible into rostrum, haustellum and labellum. The mouthparts of cockroach are biting and chewing type. Grasshopper mouthparts are adapted for cutting & grinding up tough plant food; butterflies have a single, long, curled sucking tube for drinking nectar; & mosquitoes have both a sucking tube and needle-like structures for piercing skin. These paired "teeth" that can be opened and closed to get the work done. The mandibles in these flies are useful in slicing the skin and then the blood which is exposed is sponged up. These similar mouthparts are an example of homologous organs. mouthparts behind it. The main function of mouthparts is involved in feeding and therefore it varies in form and structure according to the taxonomic group and feeding habit of the taxa. 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