Insect taxonomic diversity Insect orders Ephemeroptera Odonata Blattaria Isopertera Dermatptera Orthopera Insect orders phasmida hemiptera coleoptera Lepidoptera diptera siphonoptera Insect orders Hymenoptera Mantodea Plecoptera ephemeroptera They have been placed into an ancient group of insects termed the Palaeoptera, which also contains dragonflies and damselflies. They are aquatic insects whose immature stage (called "naiad" or, colloquially, "nymph") usually lasts one year in fresh water. The adults are short-lived, from a few minutes to a few days, depending on the species. About 2,500 species are known worldwide, including about 630 species in North AmericaPalaeopteradragonfliesdamselfliesaquatic insectsnymphfresh waterNorth America Odonata The smallest living dragonfly is Nannophya pygmaea (Anisoptera: Libellulidae) from east Asia, which a body length of 15 mm and a wing span of 20 mm, and the smallest damselflies (and smallest odonates of all times) are species of the genus Agriocnemis (Zygoptera: Coenagrionidae) with a wing span of only 1718 mm.Nannophya pygmaeaAgriocnemis Blattaria The name "cockroach" comes from the Spanish word for cockroach, cucaracha, transformed by English folk etymology into "cock" and "roach". The term cucaracha (streak bug, sp.) originally was used for the wood louse (the sow bug), but later was used to mean the palmetto bug (the flying cockroach). It is from this later Mexican usage that English-speaking Americans began using the term for regular (non-flying) cockroach. [citation needed]cockroachfolk etymologycockroachcitation needed isoptera Termite colonies produce a reproductive caste when they have reached a certain size. These individuals consist of male and female termites that on warm humid nights usually fly away from the nest to mate and begin new colonies.caste dermatptera Earwigs are abundant and can be found throughout the Americas and Eurasia. The common earwig was introduced into North America in 1907 from Europe, but tends to be more common in the southern and southwestern parts of the United States. [6]:739 The only native species of earwig found in the north of the United States is the spine-tailed earwig (Doru aculeatum), [7]:144 found as far north as Canada, where it hides in the leaf axils of emerging plants in southern Ontario wetlands. However, other families can be found in North America, including Forficulidae (Doru and Forficula being found there), Labiidae, Anisolabididae, and Labiduridae. [8]AmericasEurasia [6]spine-tailed earwig [7]OntariowetlandsForficulidaeDoru ForficulaLabiidaeAnisolabididae Labiduridae [8] orthoptera is an order of insects with paurometabolous or incomplete metamorphosis, including the grasshoppers, crickets, cave crickets, Jerusalem crickets, katydids, weta, lubber, Acrida, and locusts. Many insects in this order produce sound (known as a "stridulation") by rubbing their wings against each other or their legs, the wings or legs containing rows of corrugated bumps.insectsincomplete metamorphosisgrasshopperscricketscave cricketsJerusalem crickets katydidswetalubberAcridalocustssoundstridulation Phasmatodea Phasmatodea (sometimes called Phasmida or Phasmatoptera) are an order of insects, whose members are variously known as stick insects (in Europe and Australasia), walking sticks or stick-bugs (in the United States and Canada), phasmids, ghost insects and leaf insects (generally the family Phylliidae)insects EuropeAustralasiaUnited StatesCanadaPhylliidae Hemiptera is an order of insects most often known as the true bugs (cf. bug), comprising around 50,00080,000 species [2] of cicadas, aphids, planthoppers, leafhoppers, shield bugs, and others. They range in size from 1 mm (0.04 in) to around 15 cm (6 in), and share a common arrangement of sucking mouthparts. [3] Sometimes, the name true bugs is applied more narrowly still to insects of the suborder Heteroptera onlyorderinsectsbugspecies [2]cicadasaphidsplanthoppers leafhoppersshield bugs mouthparts [3]Heteroptera coleoptera The Coleoptera include more species than any other order, constituting almost 25% of all known types of animal life- forms. [2][3][4] About 40% of all described insect species are beetles (about 400,000 species [5] ), and new species are discovered frequently. Some estimates put the total number of species, described and undescribed, at as high as 100 million, but a figure of one million is more widely accepted. [6] The largest taxonomic family is commonly thought to be the Curculionidae (the weevils or snout beetles), but recently the Staphylinidae (the rove beetles) have claimed this title. [species [2][3][4] [5] [6]CurculionidaeStaphylinidae lepidoptera These insects undergo complete metamorphosis; that is, each individual goes through four stages: egg, larva (the caterpillar), pupa (chrysalis or cocoon)complete metamorphosis diptera Flies are adapted for aerial movement and typically have short and streamlined bodies. The first tagma of the fly, the head, consists of ocelli, antennae, compound eyes, and the mouthparts (the labrum, labium, mandible and maxilla make up the mouthparts).tagmaocelliantennaecompound eyesmouthparts siphonoptera Fleas are wingless insects (1/16 to 1/8-inch (1.5 to 3.3 mm) long) that are agile, usually dark colored (for example, the reddish- brown of the cat flea), with tube-like mouth-parts adapted to feeding on the blood of their hosts. Hymenoptera The Hymenoptera are one of the largest orders of insects, comprising the sawflies, wasps, bees and ants. Over 150,000 species are recognized, with many more remaining to be described. The name refers to the wings of the insects, and is derived from the Ancient Greek (hymen): membrane and (pteron): wing. The hind wings are connected to the fore wings by a series of hooks called hamuli.ordersinsectssawflieswaspsbeesantsAncient Greek hind wingsfore wingshamuli Mantodea The English common name for the order is the mantises, or rarely (using a Latinized plural of Greek mantis), the mantes. The name mantid refers only to members of the family Mantidae, which was, historically, the only family in the Order, but with 14 additional families recognized in recent decades, this term can be confusing. The other common name, often applied to any species in the order, is "praying mantis"common nameMantidae Plecoptera The Plecoptera are an order of insects, commonly known as stoneflies. Some 3,500 species are described worldwide, [1] with new species still being discovered. Stoneflies are found worldwide, except Antarctica. [2] Stoneflies are believed to be one of the most primitive groups of Neoptera, with close relatives identified from the Carboniferous and Lower Permian geological periods, while true stoneflies are known from fossils only a bit younger. The modern diversity, however, apparently is of Mesozoic origin. [3]orderinsects [1] [2]NeopteraCarboniferousPermianMesozoic [3] The end