Insects Classification of Insects Kingdom Animalia Invertebrates Phylum

Insects

Classification of Insects • Kingdom Animalia – Invertebrates • Phylum Arthropoda – Exoskeleton – Jointed legs

• Class Centipedes Class Millipedes Class Crustaceans Class Arachnids

Class Insecta Characterisitics • 3 body parts • Six legs

Class Insecta Characteristics • Two pairs of wings • Two kinds of eyes – compound

Class Insecta Characteristics • Two Antennae • Two sets of jaws

Class Insecta Characteristics • All insects begin their life cycle as an egg.

Insect Orders

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

True Bugs All bugs are insects but not all insects are bugs Order Hemiptera Long feeding tubes

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