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Insects Classification of Insects • Kingdom Animalia – Invertebrates • Phylum Arthropoda – Exoskeleton – Jointed legs Other Classes of Arthropods Class Centipedes Class Millipedes Class Crustaceans Class Arachnids Class Insecta Characteristics • 3 body parts • Six jointed legs Class Insecta Characteristics • Two pairs of wings • Two kinds of eyes – Compound & simple Class Insecta Characteristics • Two Antennae – Sensory organs • Two sets of jaws -mandibles Class Insecta Characteristics • All insects begin their life cycle as an egg. Insect Orders True Bugs All bugs are insects but not all insects are bugs Order Hemiptera Long feeding tubes Insects place in the Animal Kingdom • 1 million species identified (Most populous of all living things) • Most diverse of all organisms Insects place in the Animal Kingdom • Can live in any environment • Well adapted to their environment – camouflage Harmful Insects • Destroy Crops • Carry/Spread Diseases Parasitic Helpful Insects Food for other organisms Pollinate flowers to produce fruits and vegetables Helpful Insects Eat other harmful insects Help in decay of dead organisms Exoskeleton • A hard outer covering • Used for protection • Made of chitin Insect Head – Eyes, mouthparts, antennae Insect Thorax – legs, wings Insect Abdomen – digestive and reproductive organs Insect Antennae (Feelers) • Sensory Organs – Touch – Taste – Smell – Hearing Insect Mouthparts Sponging/Lapping Ex. housefly Siphoning/Proboscis Ex. butterfly Insect Mouthparts Piercing/Sucking Ex. Wheel bug and Mosquito Chewing Ex. caterpillars None Ex. mayfly Insect Wings Membranous Clear with veins showing Hard shell like outer wings Powdery Scales Insect Life cycles • Simple Metamorphosis hatches from egg looking just like the adult grows in size by molting Insect Life Cycles • Incomplete Metamorphosis – Hatches from egg and becomes a nymph – Nymph does not have fully developed wings – Molts to become an adult Insect Life Cycles • Complete Metamorphosis – Egg – Larva (Caterpillar) – Pupa (Chrysalis or Cocoon – Adult
