Plecoptera is a scientific term typically used to refer to a group of insects commonly known as stoneflies. Synonyms for plecoptera include the stonefly order, Plecoptera Newman, and the order of plecopterans. Stoneflies are typically found in cool, clear streams and rivers and are known for their flattened bodies and wing cases. They are important indicators of water quality and can be used to assess the health of aquatic ecosystems. Stoneflies are also popular among fly anglers as they are often used as bait for freshwater fishing. There are over 3,400 species of plecoptera known to science, each uniquely adapted to its specific habitat.