This is the largest and most successful of the animal phyla, with over 1 000 000 identified species. Arthropods are currently thought to have evolved from annelids. Romalea microptera beauvois, eastern lubber grasshopper schistocerca americana drury, american grasshopper schistocerca ceratiola hubbell and walker, rosemary grasshopper. Insect identification part i classes of arthropoda, orders of insecta abdomen. Some common arthropods that are good sources of food are crustaceans such as crabs and prawns. Phylum arthropoda definition of phylum arthropoda by the. It is the most diverse group of organisms on earth.
Position of insects in animal kingdom and their relationship with oth. Class insecta class chilopoda centipedes class diplopoda millipedes class crustacea 1. Class insecta order diptera family except those listed as suborders culicidae common. The arthropoda phylum contains the most species on earth, mainly due the number of animals in the insecta class. Phylum arthropoda class insecta order orthoptera family acrididae genus hesperotettix species viridis. Arthropods are characterized by their jointed limbs and cuticle made of chitin, often mineralised with calcium carbonate. Members of the phylum arthropoda contain the class insecta and many related animals that frequently get mistaken for insects. Mouthparts ectognathous exposed adapted for biting.
The phylum arthropoda contains numerous taxonomic orders in over 20 classes. In the strepsipteran family myrmecolacidae, the males parasitize ants, while the females parasitize orthoptera. Phylum arthropoda make up about twothirds of the earths. Although the insects numerically dominate the land as a group their predominance fades in the aquatic environment. Body is divided into three parts, head, thorax and abdomen the distinguishing feature of insects. In insects these other head ganglia combine into a pair of subesophageal ganglia, under. There are more species of insects than species in all the other classes of animals combined insects differ from other arthropods in having three pairs of legs and usually two pairs of wings on the thoracic region of the body, although. Classification of class insecta upto orders phylum. The arthropod body plan consists of segments, each with a pair. Class crustacea class arachnida class insecta class chilopoda centipedes class diplopoda millipedes class crustacea 1. Insect, any member of the class insecta hexapoda, the largest class of phylum arthropoda, about 1 million species or threefourths of all animals. Insects are a class in the phylum arthropoda, so they have all of the characteristics of the arthropods. Phylogeny, classification, nomenclature, arthropoda, hexapoda, insecta.
Insects are of the class insecta and they make up the largest class of the phylum called arthropoda arthropods. Same function as in humans most food is ingested in form of macromolecules, proteins, fats, polysaccharides, and nucleic acids and are broken down into smaller parts like amino acids and simple sugars digestion. The number of insect species outnumbers all other terrestrial animals and plants together. Spiders are among these relatives and can be distinguished from their insect kin by their eight, rather than six, legs. They have a pair of scaled wings, a pair of halteres, a slender body and long legs. He regarded ephemeroptera as a very divergent group that separated very early from the evolutionary. Class insecta of phylum arthropoda has undergone and continues to undergo changes in its classification. The following valid taxon described before 2000 was absent and is now included. Mosquitoes are common flying insects in the family culicidae with a worldwide distribution. Here is an alphabetical list of insect orders in current usage with examples of insects types. Compare insects to other living organisms, understand what insect adaptations have contributed to their success 3. Thus, according to lemche, the wing arose independently three times in the phylogeny of the class insecta, and ephemeroptera and odonata are of separate phylogenetic origin. Three pairs of jointed legs 6 legs compound eyes which contain several thousand lenses leading to a larger field of vision two antenna one of the most diverse group of animals on earth. Insects belong to the phylum arthropoda, which means literally jointed legs.
Head has one pair of antennae thorax middle bit has three pairs of legs. An arthropod is an invertebrate animal having an exoskeleton, a segmented body, and paired. Class crustacea species richness subclasses phylum arthropoda subphylum trilobitomorpha v class trilobita v subphylum chelicerata v class merostomata v class pycnogonida v class arachnida v subphylum mandibulata class crustacea class myriapoda class insecta arthropod nervous system ventral, paired nerve cord dorsal brain. Ellis, amsterdam, the netherlands this work is licensed under a creative commons attribution noncommercial sharealike 4. Relate methods of attaining success to the human race biological classification kingdom, phylum, class, order, family, genus, species binomial nomenclature leptinotarsa decemlineata phylum arthropoda 6. Introduction to the identification of insects and related arthropods. Phylum arthropoda subphylum atelocerata mandibulata class diplopoda millipedes class chilopoda centipedes class pauropoda pauropods class symphala symphylans class hexapoda insects formerly insecta class arachnida ixodida hard and soft ticks mesostigmata mites class hexapoda diptera true flies.
The term arthropoda as originally proposed refers to a proposed grouping of euarthropods and the phylum onychophora. Arthropods can be found on every continent and in every ocean, from the harsh climate of antarctica. Arthropods are invertebrate animals with a chitinous exoskeleton, segmented bodies, and jointed legs. Subphylum crustacea and its medical significance 3. Classification of class insecta upto orders insect is a six legged arthropod. Some of the topics covered include the structure of a housefly and common. As you may have guessed, this is one trait seen in all arthropods, including insects as. Learn more about insects, both their similarities and their differences. The arthropod class of animals includes insects, which also have important ecological and economic roles. Phylum arthropoda class insecta monarch butterfly praying mantis fire ant dung beetle lady bug house fly characteristics 3 body segmentshead, thorax and abdomen 6 legs 1 pair of antennae usually 12 pairs of wings simple brain have a hard exoskeletonexternal skeleton, made of chitin when skeleton gets too small, they molt help. Class insecta contains all insects and belong to the phylum arthropoda.
Insects can experience pigment changes from eating certain foods or in some cases they can be manufactured by the insect. There are some 40,000 species in the subphylum crustacea, ranging in size from copepods and water fleas that are just large enough to be seen with the unaided eye, to shrimp that you might enjoy as food, to crabs, some with a leg span of over 12 feet. The class insecta the insects being such a large class of organisms their taxonomy and hence their classification can, and in fact does, get extremely complicated, with a large number of people discussing the merits of various taxonomic schemes. Phylum arthropoda kingdom animalia phylum arthropoda subphylum crustacea class cirripedia class copepoda class malacostraca order decapoda order euphausiacea subphylum chelicerata class merostomata class pycnogonida 2. Let us know if you have suggestions to improve this article requires login. Hemiptera in komaba campus of the university of tokyo, a highly urbanized area in japan. Class insecta insects head of a wasp with three ocelli centre, and compound eyes at the left and right a pair of simosyrphus grandicornis hoverflies mating in flight. Join britannicas publishing partner program and our community of experts to gain a global audience for your work.
Class insecta orders with examples biology education. Going through these lessons will deepen your understanding of phylum arthropoda. Body is divided into an abdomen and cephalothorax have gills 2 pairs of antennae and many special appendages. Class insecta the insects are the most numerous and diverse of all the groups of arthropods. Strepsiptera of various species have been documented to attack hosts in many orders, including members of the orders zygentoma, orthoptera, blattodea, mantodea, heteroptera, hymenoptera, and diptera. A guide to arthropods bandelier national monument national park. Affects health of man and animals through poisonous body fluids, bites, stings or serving as transmitters of disease organisms or they may be directly parasitic. Phylum arthropoda arthropods class merostomata horseshoe crabs note carapace, cephalothorax, abdomen, telson, book gills, chelicerae and pedipalps phylum arthropoda arthropods class merostomata horseshoe crabs predators, eat worms and mollusks phylum arthropoda arthropods class pycnogonida sea spiders. In head a pair of antenna and a pair of compound eyes are usually present. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Their success due to unique jointed exoskeleton of cuticle. Arthropods are a popular source of foods to humans and also have other ecological roles. Class insecta order diptera family except those listed as suborders.