Insects

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  • Fig. 20.8
  • Fig. 20.4a
  • Fig. 20.19a
  • Fig. 20.19b
  • Fig. 20.19d
  • Fig. 20.19e
  • Fig. 20.5
  • Fig. 20.6
  • Fig. 20.Fig. 20a
  • Fig. 20.Fig. 20b
  • Fig. 20.14
  • Fig. 20.24
  • Figure: FG31-18 Title: Honeybee society. Caption: Out of thousands of females in a honeybee colony, only one bee, the queen, is likely to bear offspring. Each colony is composed of numerous female worker bees, a small number of male drones—whose sole function is to mate with a queen—and the queen bee herself. Shown is a group of workers surrounding a queen in a North American hive.
  • Figure: FG31-19 Title: Fire ant society. Caption: Like honeybees, fire ants live in societies that are organized around the care of the one breeding female, the queen, and the eggs she lays.
  • Insects

    1. 1. Class Insecta 1
    2. 2. Subphylum UniramiaClass Insecta (Hexapoda) 2
    3. 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 3
    4. 4. Distribution of Insects • Air • land • In the soil • Parasites – Plants – Animals • Freshwater • Not marine??? 4
    5. 5. Characteristics of Insects• Three body regions – Head – Thorax – Abdomen• Three pair of legs• Open circulatory system 5
    6. 6. Characteristics (cont)• Two pair of wings – One pair in flies – Absent in some• Pair of compound eyes• Spiracles for respiration 6
    7. 7. Centipede and Symphyla 7
    8. 8. Insect Evolution 8
    9. 9. 9
    10. 10. 10
    11. 11. 11
    12. 12. 12Chewing Mouthparts
    13. 13. Piercing Mouthparts 13
    14. 14. Siphoning Mouthparts 14
    15. 15. Sponging Mouthparts 15
    16. 16. 16
    17. 17. 17
    18. 18. Insect abdomen Spiracle Tergum Cercus OvipositorPleural Sternummembrane 18
    19. 19. 19
    20. 20. 20
    21. 21. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.Insect Excretion 21
    22. 22. Internal Anatomy 22
    23. 23. 23
    24. 24. 24
    25. 25. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Complete Metamorphosis 25From Raven/Johnson, Biology, 3rd ed., Copyright © 1999 The McGraw-Hill Companies.
    26. 26. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Incomplete Metamorphosis 26From Hickman/Roberts/Larson, Integrated Principles of Zoology, 11th ed., Copyright © 2001 The McGraw-Hill Companies.
    27. 27. Digger Wasp 27
    28. 28. Paralyzes Prey 28
    29. 29. 29
    30. 30. 30
    31. 31. 31
    32. 32. Social Insects • Live in colonies • Queen • King • Soldiers • Workers 32
    33. 33. Insect Societies 33
    34. 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 34
    35. 35. Become a Queen! 35
    36. 36. Swarm• New queen• Leaves with part of the hive to start a new colony 36
    37. 37. 37
    38. 38. Honey 38
    39. 39. Ant Colony 39
    40. 40. Casts in an Ant Colony 40
    41. 41. Ant Pheremones • Alarm • Food trail 41
    42. 42. 42
    43. 43. 43
    44. 44. Beneficial Insects • Honey bee – Honey – Pollinates crops 44
    45. 45. Beneficial Insects • Lady bug • Eats harmful insects 45
    46. 46. Beneficial Insects • Silkworm moth • Lava produces silk 46
    47. 47. Beneficial Insects • Breakdown dung 47
    48. 48. Beneficial Insects• Blow fly• Decompose dead bodies 48
    49. 49. Beneficial Insects • Ichneumonid wasps • Kill harmful insects 49
    50. 50. Fruit Fly • Drosophila • Genetics research 50
    51. 51. Harmful Insects• Tent catepillar• Pest of many trees and shrubs 51
    52. 52. Harmful Insects • Boll weevil • Destroys cotton 52
    53. 53. Harmful Insects • Mosquitos • Vector – Malaria – Yellow fever – Encephalitis – West Nile virus 53
    54. 54. Harmful Insects • Flea • Vector for – Plague 54
    55. 55. Xenopsylla cheopis • Rat flea • Vector for plague 55
    56. 56. Black Death • 1357-1350 killed 25,000,000 in Europe • 1900’s killed 20,000,000 in India 56
    57. 57. Bubos 57
    58. 58. Plague Survivor 58
    59. 59. 59
    60. 60. Alexandre Yersin• Discovered bacterium• Yersinia pestis 60
    61. 61. Insect Orders 61
    62. 62. Order Collembela• Springtails• 5mm long• Furcula for jumping• No wings 62
    63. 63. Order Thysanura• Firebrats• No wings 63
    64. 64. Order Odonota• Dragon flies• Damsel flies• Two pair of large wings 64
    65. 65. Order Orthoptera• Grasshopper• Cockroach• Praying mantis• Cricket 65
    66. 66. Order Dermaptera• Earwigs• Forceps-like cerci• Short wings 66
    67. 67. Order Isoptera• Termites• White• Broad waist• Winged and wingless 67
    68. 68. Order Homoptera• Cicada• Aphids• Leaf hoppers• Roof-like wings 68
    69. 69. Order Hemiptera• True bugs• Front wing – Basal portion is leathery – Apical portion of wing is membranous 69
    70. 70. Order Coleoptera• Beetles• 350,000+ species• Hard front wings meet midline• Back wings membranous 70
    71. 71. Order Lepidoptera• Butterflies – Knobbed antennae• Moths• Scales on wings• Larva are catepillars 71
    72. 72. Order Diptera• Flies• Mosquitoes• One pair of wings 72
    73. 73. Order Hymenoptera• Bees• Wasps• Ants• Four membranous wings• Narrow waist 73
    74. 74. Order Anoplura• Lice• No wings• Single claw• Sucking mouth parts• parasites 74
    75. 75. Order Siphonaptera• Fleas• Flattened laterally• Spines on legs and body• Parasites 75
    76. 76. The End 76

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