ThinkyDinks

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PowerPoint like a dichotomous key for identifying macro-invertebrates

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ThinkyDinks

  1. 1. Instructions• Click the words that describe the macroinvertebrate until you have reached a picture that is the macroinvertebrate you found.
  2. 2. ShellNo shell
  3. 3. Double shellSingle shell
  4. 4. Small, whitish, tan or brownLarge, 2-8 inches, dark-color
  5. 5. Freshwater Muscle
  6. 6. Finger Nail or Pill Clam
  7. 7. Spiral opening on leftSpiral opening on rightCoiledConical
  8. 8. Pouch Snail
  9. 9. Gilled Snail
  10. 10. Orb Snail
  11. 11. Limpet
  12. 12. LegsNo legs
  13. 13. With tentacles brushes or “tails”Worm likeMicroscopic
  14. 14. Apostrophe-shapedRoundSwims with a jerk using antennas
  15. 15. Cydops or Copepod
  16. 16. Seed and Clam Shrimp
  17. 17. Water Flea or Daphnia
  18. 18. Suckers expands and contrasts bodysegmentedReddish brown body segmentedGlides along bottom body not segmentedTan or brown, longBody with bristles no suckersDistinct head, red green or tan, twistsSmall, hair like swims in “s” shape
  19. 19. Leech
  20. 20. Tubifex Worm
  21. 21. Flat Worm or Planaria
  22. 22. Horsehair Worm
  23. 23. Bristle Worm
  24. 24. Midge Larva
  25. 25. Nematode or Threadworm
  26. 26. Long breathing tubeTwo fringed “tails”Smooth, “stiff”, small headedLarge, gray with tentaclesWhite or gray with tentaclesBig “headed”, activeBlack, attaches to hard surfaces
  27. 27. Rat Tailed Maggot Larva
  28. 28. Water Snipe Fly Larva
  29. 29. Horse fly Larva
  30. 30. Cranefly Larva
  31. 31. Cranefly Larva
  32. 32. Midge Pupa
  33. 33. Black fly larva
  34. 34. 10+legs4 pairs of legs3 pairs of legs
  35. 35. Lobster likeShrimp-like, swims on sideWalks on bottom
  36. 36. Scud or Amphipod
  37. 37. Crayfish
  38. 38. Aquatic Sowbug or Isopod
  39. 39. Tiny often brightly coloredRuns on top of water
  40. 40. Water Mite
  41. 41. Fishing spider
  42. 42. WingsNo wings
  43. 43. Beetle-like, wings hardLeathery wings
  44. 44. Small, crawls on bottomSwims moving hind legs alternatingBack legs move at same timeSwims on surface“Crawls” through water, spotted
  45. 45. Riffle beetle
  46. 46. Water Scavenger Beetle
  47. 47. Predaceous Diving Beetle
  48. 48. Whirligig Beetle
  49. 49. Crawling Water Beetle
  50. 50. Tan lives on surfaceDark lives on surfaceGrasping front legs up to 3 inchesSwims on back, back whiteSwims right side up, back blackLong breathing tube, grasping front legsLong stick-like
  51. 51. Marsh Treader
  52. 52. Water Strider
  53. 53. Giant Water Bug
  54. 54. Backswimmer
  55. 55. Water Boatman
  56. 56. Water Scorpion ‘Nepa’
  57. 57. Water Scorpion ‘Ranatra’
  58. 58. No obvious “tails”One or two “tails”Three “tails”
  59. 59. Brown, leather like, 6 legs, usually “c” shaped.6 legs, and prolegs on abdomen.Suction cup like.Large body, hinged mouth.Green, tan, orange or white body.Lives in stone case. Lives in stick house.
  60. 60. Riffle Beetle Larva
  61. 61. Pyralid Caterpillar
  62. 62. Water Penny
  63. 63. Dragon Fly Larva
  64. 64. No Case Caddisfly Larva
  65. 65. Stone Case Caddisfly Larva
  66. 66. Wood Case Caddisfy Larva
  67. 67. Dark head, green or tan body, two brush liketails. Small “spines” on side Large mouth parts. “spines” on side.“Tails” long and stiff, long antennas. Flat gills on abdomen. Hangs from surface, large mouth parts.
  68. 68. Caddisfly Larva
  69. 69. Alderfly Larva
  70. 70. Dobsonfly Larva
  71. 71. Stonefly Larva
  72. 72. Mayfly Larva
  73. 73. Predaceous Diving Beetle Larva
  74. 74. Long “tails” gills on abdomen.Large legs leathery gills.Plate like “tails", no gills on abdomen.
  75. 75. Mayfly Larva
  76. 76. Mayfly larva
  77. 77. Damselfly Larva

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