All habitats except saltwater - replaced by crustacea there a. Freshwater b. Terrestrial c. … Habitat: Crustaceans can be found in a wide range of habitats: most are free-living freshwater or marine animals, but some are terrestrial, some are parasitic, and some do not move. Characteristics a. 3 pairs of legs b. In addition to the Class Insecta there are three other classes of invertebrates that have six legs, these three classes are known as non-insect hexapods. Insects have a hard protective covering called an exoskeleton. Body is divided into three regions 2. The Insects - Class Insecta. their insect prey on flowers Then And now … “They’ve had an incredible impact on high-end hotels. Unique biology 1. Most groups have functional wings 4. Absence of Wings - Arachnids lack wings unlike Insects. 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. In head a pair of antenna and a pair of compound eyes are usually present. Insects (Insecta) are the most diverse of all animal groups.There are more species of insects than there are species of all other animals combined. Learn more about insects, both their similarities and their differences. Three Body Regions 2. All habitats except saltwater - replaced by crustacea there a. Freshwater b. Terrestrial c. Ocean beaches 2. Classification of Class Insecta. 2 pairs of wings (most) except flies (1 pair of wings - Diptera) B. Tracheae respiratory system Class Hexapoda (Insecta) Insect Characteristics4 4. Insects Classification ———-For Correction and Improvements please use the comments section below. Insect, (class Insecta or Hexapoda), any member of the largest class of the phylum Arthropoda, which is itself the largest of the animal phyla. the major and distinguish characteristics of class insecta are: their body consists of three regions head thorax abdomen 2. second thorax has definite three segments while abdomen has … Distribution 1. Characteristics of: Class Insecta Adult Insect Characters: • 3 pairs of legs • 3 body regions (head, thorax, abdomen) • Zero, 1, or 2 pairs of wings • 1 pair of antennae . Nabidae - the damsel bugs Predaceous on various insects including aphids and caterpillars It is the most diverse group of organisms on earth. Three pairs of legs 3. VERY important! One pair of antennae 5. Diet: Many crustaceans are scavengers, feeding on scraps and dead creatures. If the word ‘bedbug’ gets out, it scares a lot of people away.” Mike Lawton, Entomologist for Western Exterminator on the return of the bedbug. Very species rich 2. Many Arachnids also possess more complex structures, called 'Trichobothria'. Class Insecta contains all insects and belong to the phylum Arthropoda. Ø Respiration through tracheae Very adaptable C. External Anatomy 1. 2. Insecta Insects (1,000,000) Aquatic, Land, Air .1mm-25cm Diplopoda Millipede (8000) Terrestrial .1-100cm Chilopoda Centipede (3,000) Terrestrial .1-100cm Classes of Arthropoda Class Insecta 6. Credit: Horia Varlan/CC-BY 2.0. Phylum : Arthropoda (with several classes) Class: Insecta (Hexapoda) Characters of class Insecta 1. Absence of Antennae - Though Arachnids look like Insects but there is one distinct features which separates it from Insects and that is the Absence of Antennae in any Arachnid. 2003. Ø Abdomen contains most of the internal systems such as respiratory, excretory and reproductive systems. Insects have segmented bodies, jointed legs, and external skeletons (exoskeletons). Crabs, shrimp, and prawns search for food mainly at night and hide in crevices by day. Spread the love Classification of Class Insecta Insects Classification ———- For Correction and Improvements please use the comments section below. A typical adult insect has three distinct body regions: head, thorax and abdomen.