It possesses a pair of compound eyes … Most insects have antennae that allow them to touch, taste, hear and smell. Insect, (class Insecta or Hexapoda), any member of the largest class of the phylum Arthropoda, which is itself the largest of the animal phyla. All ADULT insects have the following characteristics: The Diagnostic Characteristics of Insecta: The Diagnostic Characteristics of Insecta? Class - Insecta. They include, for example, ants, bees, wasps, beetles, butterflies, dragonflies and fleas. It includes 8 sorting category pages, as well as 5 pages of cards to cut and sort (60 cards included! Characteristics of Insect Class Insecta 1. All insects have the following in common: Exoskeleton – Insects all have an exoskeleton. Aquatic insects are hypothesized to be secondarily aquatic having evolved from terrestrial insects. maggot. Insects are distinguished from other arthropods by their body, which is divided into three major regions: (1) the head, which bears the mouthparts, eyes, and a pair of antennae, (2) the three-segmented thorax, which usually has three pairs of legs (hence “Hexapoda”) in adults and usually one or two pairs of wings, and (3) the many-segmented abdomen, which contains the digestive, excretory, and reproductive organs. The gan­glia are largely in­de­pen­dent in their func­tion­ing; for ex­am­ple, an iso­lated tho­rax is ca­pa­ble of walk­ing. This represents about three-fourths of all described animal species. Insect Larvae forms. Exoskeleton 3 Body Regions: Head, Thorax, and Abdomen 3 Pairs of Segmented Legs 1 Pair of Antennae Most Have Two Pairs of Wings (fleas, tics, and ants don't) Some such as flies have only 1 pair of wings. (1) Insects exist in virtually all habitats on Earth whether terrestrial, aquatic, or in the air. Cockroaches and grasshoppers go through an incomplete metamorphosis. White-lined sphinx moth feeding in flight. Insects have the following distinctive characteristics that put them in the class of insects: Insects posses a hard outer covering called exoskeleton instead of backbone and spines and thus are classified as invertebrates. Amazingly, more species of insects exist than ALL other organisms combined. In many species the difference in body structure between the sexes is pronounced, and knowledge of one sex may give few clues to the appearance of the other sex. Discover the characteristics of insects, their life-cycles, the roles they play in their ecosystems, and why they are so important for life on Earth… 3. Author of. Humans, for instance have bilateral symmetry and a pair of eyes. Because they lack backbones, they are invertebrates. Johnston's organ in pedicel (second segment) of antenna. The Class Insecta can be further divided into 29-32 Orders depending upon the classification system used. Updates? Around the body of the insect, there is an exoskeleton. Body is segmented. ). Class Insecta of Phylum Arthropoda has undergone and continues to undergo changes in its classification. Get exclusive access to content from our 1768 First Edition with your subscription. The first three characteristics listed, might be considered distinguishing. Insects have a large number of unique, derived characteristics, although none of these are externally obvious in most species. Students then drag the characteristics … Campodeiform – legs well. General characters of Insecta (Insects) Ø Characters explained for sub-phylum Hexapoa is common for classes of Insecta. Locomotion. Coleoptera Beetles 3. As you may have guessed, this is one trait seen in all arthropods, including insects as well as animals like arachnids (spiders) and crustaceans (crabs). Insects body can be divided into three main parts called the head, thorax and abdomen. By signing up for this email, you are agreeing to news, offers, and information from Encyclopaedia Britannica. Characteristics. The ner­vous sys­tem of in­sects is com­plex, in­clud­ing a num­ber of gan­glia and a ven­tral, dou­ble nerve cord. Modes of reproduction are quite diverse, and reproductive capacity is generally high. Thorax (middle bit) has three pairs of legs. Thorax (middle bit) has three pairs of … LiveScience - 20 Startling Facts About Insects, insect - Children's Encyclopedia (Ages 8-11), insect - Student Encyclopedia (Ages 11 and up). M.B. The single greatest characteristic is that all adult insects possess six pairs of legs. Subjects: The single greatest characteristic is that all adult insects possess six pairs of legs. Some insects go through a complete metamorphosis, meaning they grow into completely different creatures than they were in their larval stage. These are tracheated arthropods. Each insect is important and each has a different function, ranging from predator to prey to host. Insect body is divided into 3 regions viz., head, thorax and abdomen 5. Amazingly, more species of insects exist than ALL other organisms combined. by Mark Ascerno. It possesses a pair of compound eyes & antennae. (1) Insects exist in virtually all habitats on Earth whether terrestrial, aquatic, or in the air. Berg, in Encyclopedia of Inland Waters, 2009. These include (Kristensen, 1991): lack of musculature beyond the first segment of antenna. Insects are cold blooded and have six legs, three main body parts and an exoskeleton. 4. Many insects use the legs for both jumping and running. Insects and spiders are fascinating, from delicate butterflies to dancing honeybees and fuzzy tarantulas. 471 People Used Because they lack backbones, they are invertebrates. Some insects, such as the mayflies, feed only in the immature or larval stage and go without food during an extremely short adult life. There are other characteristics which most, but not all, insects share, i.e. The wings are used to give the insects the ability to fly. Insects also lay eggs and many have four wings. There are other characteristics which most, but not all, insects share, i.e. Johnston's organ in pedicel (second segment) of antenna. Insects that go through this change include butterflies, true flies and beetles. They have the … These include (Kristensen, 1991): lack of musculature beyond the first segment of antenna. Insect Larvae forms. Omissions? Insects have a hard protective covering called an exoskeleton. 6. Insects have a pair of antennae on top of their heads. Insects are a class in the Phylum Arthropoda, so they have all of the characteristics of the Arthropods. Species in each order share unique characteristics that set them apart from other insects, yet have the same traits that all insects share. People often refer to insects as bugs, but this is not always true. Facts, pictures and information on Insecta – the largest class of animals on Earth. They range in size from microscopic soil-dwelling insects to large beetles and butterflies … Some of the feather-winged beetles and parasitic wasps are almost microscopic, while some tropical forms such as the hercules beetles, African goliath beetles, certain Australian stick insects, and the wingspan of the hercules moth can be as large as 27 cm (10.6 inches). Body is divided into three parts, head, thorax and abdomen - the distinguishing feature of insects: Head has one pair of antennae. Subphylum UNIRAMIA: Insects, Centipedes, Millipedes. The Insects - Class Insecta. Here is an alphabetical list of insect orders in current usage with examples of insects types: 1. While insects display all these characteristics, not all are distinguishing. 6. This being said, since biological success is a numbers game, the insects win hands down. The antennas are usually positioned on the head of the insect. Every Single Insect Has These 4 Characteristics. Body is divided into three parts, head, thorax and abdomen - the distinguishing feature of insects: Head has one pair of antennae. Ø Usually terrestrial, some are aquatic They include, for example, ants, bees, wasps, beetles, butterflies, dragonflies and fleas. Yet gan­glia also use sen­sory out­put. Diplurans are the most primitive insect species, with no eyes or wings. General characteristics of insects: The body is comprised of 3 distinct body regions -- head, thorax, and abdomen The thorax of adults bears 3 pairs of legs and 2 pairs of wings The "breathing" system is comprised of air tubes A look at the outside of an insect: Order Diplura. Explain what characteristics are and begin to list and explain the characteristics of insects: Insects have 3 main body parts, they have 6 legs, they have antennae, and they have an exoskeleton. Each of the insect orders are listed below and, by following the links, information on each order is provided (main characteristics, life cycle and other interesting facts) along with links to other Web sites containing further information:-[Subclass] Apterygota. Ø Abdominal appendages are absent or extremely reduced. Arachnids are a Class (Arachnida) of joint-legged Invertebrate Animals in the subphylum Chelicerata. Subphylum UNIRAMIA: Insects, Centipedes, Millipedes. Insects are often used in investigations of hormonal action, nerve and sense organ function, and many other physiological processes. In some cases the adult insects make elaborate preparations for the young, in others the mother alone defends or feeds her young, and in still others the young are supported by complex insect societies. Insects that go through an incomplete metamorphosis look very similar to adults of the same species, only smaller. Characteristics Of Insects Temperature Thermal Energy And Heat Answers Archimboldo Simple Binary Ionic Compounds Naming Ions And Chemical Compounds 5 Answer Key Insects Fly Context Clues Advanced Context Clues Transitional Words 3rd Grade Urdu Essay Grade 5 Deserts Climate Exercies Explain that some, but not all insects have wings. Let us know if you have suggestions to improve this article (requires login). How you can identify 3. Discover the characteristics of insects, their life-cycles, the roles they play in their ecosystems, and why they are so important for life on Earth… There are three in every four animals! Characteristics of Insect Class Insecta 1. General characteristics of Insects (class):- Insects are the most successful life form on the planet: they make up more than half of all living things on Earth- Some experts suggest that there are more than 10 million insects- Divided into 29 orders 4. Facts, pictures and information on Insecta – the largest class of animals on Earth. This is a hard shell like covering on the outside of its body. There are about a million species of insect and many more yet to be discovered. While it would be correct to say that all bugs are insects, we cannot say that all insects are bugs. Our editors will review what you’ve submitted and determine whether to revise the article. In numbers of species and individuals and in adaptability and wide distribution, insects are perhaps the most eminently successful group of all animals. They are largely terrestrial and solitary Animal, gathering only for mating. There are about a million species of insect and many more yet to be discovered. Archaeognatha (Order: Microcoryphia) The taxonomic insect classification is: Kingdom Animalia, Phylum Arthropoda, and Order Insecta. Body is divided into three parts, head, thorax and abdomen - the distinguishing feature of insects: Head has one pair of antennae. Insects: The Ultimate Guide. Much of the scientific knowledge of genetics has been gained from fruit fly experiments and of population biology from flour beetle studies. Terrestrial Origin. There are more than one million insect species in the world today and they are the most diverse group of creatures in the world. Insect Larvae forms. The orders that contain the greatest numbers of species are Coleoptera (beetles), Lepidoptera (butterflies and moths), Hymenoptera (ants, bees, wasps), and Diptera (true flies). Insects have segmented bodies, jointed legs, and external skeletons (exoskeletons). 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