Modern insects are highly adapted to an immense range of habitats throughout the world, from deserts to snowfields, from rainforest to savannah. Insects are a class in the Phylum Arthropoda, so they have all of the characteristics of the Arthropods. Phylum Arthropoda, Class Insecta The focus is a typical insect, showing all the characteristics of the class. In majority of them larval stage is different from the adult and there is a distinct metamorphosis. Sub-kingdom: Eumetazoa Difference between Centipedes and Millipedes. Kingdom: Animalia Class Insecta is the most diverse class of arthropods due to their short life spans, rapid reproduction, increased variation, and the potential for new adaptations. 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 Ø Class Insecta includes more than half of the all known living species Ø Usually terrestrial, some are aquatic Ø Usually absent in marine environments Ø * Mouth … Muliticellular or unicellular? Insects are the only arthropods with wings. Super-phylum: Ecdysosoa Sub-phylum: Hexapoda Insects have some distinctive characteristics that set them apart from other arthropods. These are tracheated arthropods. The Class Insecta, or the slightly larger Superclass Hexapoda (which additionally includes the orders Collembola, Protura and Diplura), is the world's most species-rich group of organisms, with about 1 million described species. •Chewing mouthparts (sometimes located at the tip of a beak). 2. With so many catalogued insects in the world, it only makes sense for researchers to develop a contained system of orders. An insect's body has three major body parts, including a head, thorax and abdomen. In fact, there are so many insects that no one knows quite how to count them all — … Although the insects numerically dominate the land as a group their predominance fades in the aquatic environment. In the class Insecta, only 9 out of 28 orders undergo complete metamorphosis, yet these 9 orders represent about 86% of all insect species alive today. The insects take in air using tracheae which are a system of tubes placed throughout the body. Insects have ability to fly and can still use legs effectively. Coleoptera Beetles 3. The class Arachnida includes a diverse group of arthropods: spiders, scorpions, ticks, mites, harvestmen, and their cousins. And the diversity is astounding. Characteristics of Insect Class Insecta 1. These include (Kristensen, 1991): lack of musculature beyond the first segment of antenna. Insects form the larger part of the land animals in Blattodea Cockroaches 2. Insects have segmented … Insects or Insecta (from Latin insectum) are hexapod invertebrates and the largest group within the arthropod phylum.Definitions and circumscriptions vary; usually, insects comprise a class within the Arthropoda. Insect, (class Insecta or Hexapoda), any member of the largest class of the phylum Arthropoda, which is itself the largest of the animal phyla. Its primary function is dispersal and reproduction. Subphylum UNIRAMIA: Insects, Centipedes, Millipedes. All habitats except saltwater - replaced by crustacea there a. Freshwater b. Terrestrial c. … It is of the importance in temperate countries, but is of considerable economic importance in tropical and sub-tropical parts of the world. Coleoptera (beetles and weevils) is the largest order in the class Insecta. Class Insecta - The insects A Introduction 1. Learn class insecta with free interactive flashcards. 1.1. Insects have a hard protective covering called an exoskeleton. In fact, most animal species are insects. Most Praying Mantis Lady Bug Metallic Ceiba Bug Organisms: Monarch Butterfly What are two examples of insecta? Insects have a large number of unique, derived characteristics, although none of these are externally obvious in most species. All Arachnids have multiple legs and look like Insects, the only difference is that Insects have six leg and Arachnids have 8 legs. The name Arachnida is derived from the Greek aráchnē with ties to a myth.In Greek mythology, Aráchnē was a woman who was turned into a … Insects can experience pigment changes from eating certain foods or in some cases they can be manufactured by the insect. Johnston's organ in pedicel (second segment) of antenna. In many cases this can be true however many species can be beneficial. Insects are small animals which have the body divided into three regions, the head, thorax and abdomen. Class Insecta of Phylum Arthropoda has undergone and continues to undergo changes in its classification. Because they lack backbones, they are invertebrates. Characteristics a. Class Insecta: Introduction. A body divided into three parts (head, thorax and abdomen) 1.2. Thorax (middle bit) has three pairs of … The body is divided into head, thorax, and abdomen. Three pairs of legs 1.3. The arthropoda characteristics are mentioned below: The body is triploblastic, segmented, and bilaterally symmetrical. Endopterygota; Exopterygota Division Endopterygota internally developed wings; fleas and flies +5 more terms Arachnids are a Class (Arachnida) of joint-legged Invertebrate Animals in the subphylum Chelicerata. Phylum: Arthropoda The ability to fly has played an important role in their spectacular radiation on land. Very species rich 2. Ø A large taxa, includes insects and a small group of wingless arthropods Ø Body plan: 3 parts, head, thorax and abdomen Ø Head with six segments Ø Thorax with three pairs of jointed legs (hence the name hexapoda) These appendages are all jointed and usually elongate. Ø  Characters explained for sub-phylum Hexapoa is common for classes of Insecta. Insects can live on land, in the water or both and are cold-blooded creatures that require the sun to warm them. Short life cycle, numerous egg laying periods. It would be hard to get through the day without a close encounter with a six-legged species. In North America alone, there are about 8,000 arachnid species. Their numbers are nothing short of remarkable — both in terms of how many individual insects there are, as well as how many species of insects there are. Reproductive capacity is enormous and larval stages grow by molting (ecdysis). For each of the following characteristics, indicate whether the trait is common to Phylum Arthropoda or specific to certain classes of arthropods: wings, chewing mouthparts, jointed Body is divided into three regions 2. They are found on land, in the air, and in the sea.
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