Which insect is in order Plecoptera?

• A. Surplus Fly
• B. Tent Caterpillar Moth
• C. Stonefly
• D. Termite

Answer: (C)

Plecoptera are stoneflies. This order is defined by insects whose aquatic immature stages (naiads) live in streams and rivers, and whose adults have long, slender bodies with two pairs of wings held flat over the back. The paired tail-like appendages on the nymphs and the overall shape of stoneflies help them stand out from other orders. The option that names a stonefly fits Plecoptera, while the tent caterpillar moth is a Lepidopteran, termites are in Blattodea, and a so-called surplus fly would be a fly genus or order such as Diptera. So the stonefly is the insect in Plecoptera.