macroinvertebrates for stream assessment

Question 1

Answer 1

• Leech
• small body, ends with suction pads. Flat & Broad segmented.
• GROUP 3 TAXA/POLLUTION TOLERANT

Question 2

Answer 2

• Alderfly Larva
• Looks like small Hellgrammite, but has 1 long thin branched tail at back end (no hooks)
• 6 legs + fake legs
• GROUP 2 TAXA/SOMEWHAT SENSITIVE

Question 3

Answer 3

• Aquatic Worm
• very tiny, thin worm-like body
• Tangled, threadlike
• GROUP 3 TAXA/POLLUTION TOLERANT

Question 4

Answer 4

• Beetle Larva
• 6 legs on upper half of body, feelers, antenna
• GROUP 2 TAXA/SOMEWHAT POLLUTION SENSITIVE

Question 5

Answer 5

• Black Fly Larva
• Black/dark-colored head
• Has leg-like structures on its head
• tiny hooks on the end of it’s abdomen
• GROUP 3 TAXA/POLLUTION TOLERANT

Question 6

Answer 6

• Caddisfly larva
• 6 hooked legs on upper 3rd of body
• 2 hooks at back end
• May be in a stick, rock or leaf case with its head sticking out
• May have fluffy gill tufts on lower half
• Exactly 6 legs, wormlike, gills on Abdomen
• GROUP ONE TAXA/POLLUTION SENSITIVE

Question 7

Answer 7

• Clam or Mussel
• 2 shells
• GROUP 2 TAXA/SOMEWHAT POLLUTION SENSITIVE

Question 8

Answer 8

• Crane fly larva
• caterpillar-like segmented body
• 4 finger-like lobes at back end
• GROUP 2 TAXA/SOMEWHAT POLLUTION SENSITIVE

Question 9

Answer 9

• Crayfish
• 2 large claws, 8 legs
• lobster-like
• GROUP 2 TAXA/SOMEWHAT POLLUTION SENSITIVE

Question 10

Answer 10

• Damselfly nymph
• 6 thin hooked legs
• 3 broad oar-shaped tails positioned like tripod
• Feathery tails large
• Hinged mouth
• GROUP 2 TAXA/SOMEWHAT POLLUTION SENSITIVE

Question 11

Answer 11

• Dragonfly nymph
• 6 hooked legs
• wide oval to round abdomen
• Tiny tail
• Hinged mouth, tiny wing pads
• GROUP 2 TAXA/SOMEWHAT POLLUTION SENSITIVE

Question 12

Answer 12

• Stonefly nymph
• 6 legs with hooked tips
• antennae
• 2 hair-like tails
• No gills
• GROUP 1 TAXA/POLLUTION SENSITIVE

Question 13

Answer 13

• Fishfly Larva
• Looks like small hellgrammite
• Light-colored body with two short, hooked tails
• no gill tufts underneath
• 6 legs + fake legs
• GROUP 2 TAXA/SOMEWHAT POLLUTION SENSITIVE

Question 14

Answer 14

• Lunged Snail
• Left opening or shell coiled inward in one plane
• GROUP 3 TAXA/POLLUTION TOLERANT

Question 15

Answer 15

• Hellgrammite
• 6 legs, large pinching jaws
• 16 feelers on lower half of body
• Short antennae
• 2 tails and 2 pairs of hooks at back end
• GROUP 1 TAXA/POLLUTION SENSITIVE

Question 16

Answer 16

• Mayfly nymph
• 6 large hooked legs
• 2 or 3 long hair like tails
• GROUP 1 TAXA/POLLUTION SENSITIVE

Question 17

Answer 17

• Midge Fly Larva
• Worm-like segmented body
• 2 tiny “arms” on each side
• Tiny, curved, segmented
• GROUP 3 TAXA/POLLUTION TOLERANT

Question 18

Answer 18

• Riffle Beetle
• Oval body covered with tiny hairs
• 6 legs, antennae
• No tail
• GROUP 1 TAXA/POLLUTION SENSITIVE

Question 19

Answer 19

• Scud
• 6+ legs
• shrimp-like
• narrow side to side
• curved in middle
• GROUP 2 TAXA/SOMEWHAT POLLUTION SENSITIVE

Question 20

Answer 20

• Aquatic Sowbug
• 7 legs
• flat, wide body
• GROUP 2 TAXA/SOMEWHAT SENSITIVE

Question 21

Answer 21

• Water Penny
• Flat, saucer-shaped body with 6 tiny legs
• GROUP 1 TAXA/POLLUTION SENSITIVE

Question 22

Answer 22

• Watersnipe Fly Larva
• Many small caterpillar-like legs
• Body is tapered at the head end
• Has two feathery-like projections at its back end
• GROUP 2 TAXA/SOMEWHAT SENSITIVE

Question 23

Answer 23

• Gilled Snail
• Right opening
• GROUP 1 TAXA/POLLUTION SENSITIVE