Key To Macroinvertebrates in Rivers and Streams
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Transcript of Key To Macroinvertebrates in Rivers and Streams
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Key To Macroinvertebrate
s in Rivers and Streams
Shell Present
Shell Absent
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ShellsSingle Shell
Double Shell
“Shell” with legs
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No LegsWormlike
With tentacles, brushes or “tails”
Legs Present
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Looks like a bunch of sticks or sand stuck
together
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Legs Present Ten +
LegsThree Pairs of LegsElongated body, “extra appendages”
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“Tail” filaments present
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Two “Tail” filaments
Three “Tail” filaments
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Snails
Group I Group III
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Group IIClams & Mussels
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Group IIILeeches
Group IIIOther Worms
Group IIIMidge Larvae
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Group IICrane Fly, Horse Fly, Deer Fly LarvaeGroup IIIBlack Fly Larvae
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CrustaceansGroup IICrayfish - Decapods
Group IIScuds or Side swimmers - Amphipods
Group IISowbugs - Isopods
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Group I Group III12
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Group IIGroup I
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Group I Group II
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Group I Group II
Other Beetle Larva
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Group I Group II16