KWIK-KEY

(for immature or wingless adult insects)

Answer for Your Specimen:

Are gills present or absent?

1. No gills present

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2. Paired tracheal gills (feather or leaf shaped) present on each of the first 7 abdominal segments

Order: Ephemeroptera

3. Thread-like tracheal gills present in tufts near the base of each leg

Order: Plecoptera

4. Gills present as long strands or filaments attached to the abdomen

Order: Trichoptera

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(Legs on thorax, mandibulate mouthparts, compound eyes, pg. 1)