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1 Class Insecta BIO 2215 Oklahoma City Community College Dennis Anderson
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2 Subphylum Uniramia Class Insecta (Hexapoda)
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3 Most Abundant and Diverse Animal Class 1,000,000+ species identified –May be as many as 30,000,000 More than all other animals combined
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4 Distribution of Insects Air land In the soil Parasites –Plants –Animals Freshwater Not marine???
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5 Characteristics of Insects Three body regions –Head –Thorax –Abdomen Three pair of legs Open circulatory system
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6 Characteristics (cont) Two pair of wings –One pair in flies –Absent in some Pair of compound eyes Spiracles for respiration
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7 Centipede and Symphyla
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8 Insect Evolution
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12 Chewing Mouthparts
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13 Piercing Mouthparts
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14 Siphoning Mouthparts
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15 Sponging Mouthparts
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18 Insect abdomen Tergum Sternum Pleuralmembrane Ovipositor Cercus Spiracle
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21 Insect Excretion Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
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22 Internal Anatomy
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25 Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Complete Metamorphosis From Raven/Johnson, Biology, 3 rd ed., Copyright © 1999 The McGraw-Hill Companies.
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26 Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Incomplete Metamorphosis From Hickman/Roberts/Larson, Integrated Principles of Zoology, 11 th ed., Copyright © 2001 The McGraw-Hill Companies.
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27 Digger Wasp
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28 Paralyzes Prey
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32 Social Insects Live in colonies Queen King Soldiers Workers
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33 Insect Societies
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34 Casts in a Bee Hive Queen –Lays eggs –Queen substance Worker –Builds hive –Takes care of eggs –Attends to queen –Royal jelly Drone –Fertilizes queen
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35 Become a Queen!
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36 Swarm New queen Leaves with part of the hive to start a new colony
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38 Honey
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39 Ant Colony
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40 Casts in an Ant Colony
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41 Ant Pheremones Alarm Food trail
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44 Beneficial Insects Honey bee –Honey –Pollinates crops
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45 Beneficial Insects Lady bug Eats harmful insects
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46 Beneficial Insects Silkworm moth Lava produces silk
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47 Beneficial Insects Breakdown dung
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48 Beneficial Insects Blow fly Decompose dead bodies
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49 Beneficial Insects Ichneumonid wasps Kill harmful insects
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50 Fruit Fly Drosophila Genetics research
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51 Harmful Insects Tent catepillar Pest of many trees and shrubs
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52 Harmful Insects Boll weevil Destroys cotton
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53 Harmful Insects Mosquitos Vector –Malaria –Yellow fever –Encephalitis –West Nile virus
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54 Harmful Insects Flea Vector for –Plague
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55 Xenopsylla cheopis Rat flea Vector for plague
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56 Black Death 1357-1350 killed 25,000,000 in Europe 1900’s killed 20,000,000 in India
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57 Bubos
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58 Plague Survivor
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60 Alexandre Yersin Discovered bacterium Yersinia pestis
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61 Insect Orders
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62 Order Collembela Springtails 5mm long Furcula for jumping No wings
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63 Order Thysanura Firebrats No wings
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64 Order Odonota Dragon flies Damsel flies Two pair of large wings
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65 Order Orthoptera Grasshopper Cockroach Praying mantis Cricket
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66 Order Dermaptera Earwigs Forceps-like cerci Short wings
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67 Order Isoptera Termites White Broad waist Winged and wingless
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68 Order Homoptera Cicada Aphids Leaf hoppers Roof-like wings
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69 Order Hemiptera True bugs Front wing –Basal portion is leathery –Apical portion of wing is membranous
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70 Order Coleoptera Beetles 350,000+ species Hard front wings meet midline Back wings membranous
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71 Order Lepidoptera Butterflies –Knobbed antennae Moths Scales on wings Larva are catepillars
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72 Order Diptera Flies Mosquitoes One pair of wings
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73 Order Hymenoptera Bees Wasps Ants Four membranous wings Narrow waist
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74 Order Anoplura Lice No wings Single claw Sucking mouth parts parasites
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75 Order Siphonaptera Fleas Flattened laterally Spines on legs and body Parasites
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76 The End
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