Chloroperlidae

Definition

A family of stoneflies (order Plecoptera) comprising more than 200 species in 22 genera, commonly called green stoneflies. Adults are typically green to yellow and emerge from cold, running water to inhabit riparian zones. The family is widely distributed across five continents and serves as an important indicator of water quality due to the group's sensitivity to pollutants. Larvae (nymphs) are hemimetabolous, lack a pupal stage, and shift from omnivory toward greater carnivory as they mature. Chloroperlidae are also valued as live bait in trout fisheries.

Etymology

From Greek chloros (green) + Perlidae (type family of stoneflies, from Latin perla, pearl).

Example

The widespread Nearctic genus Sweltsa (family Chloroperlidae) is frequently collected by fly fishers who imitate its slender green adults with tied patterns to match late-season hatches on mountain streams.

Synonyms

• Green stoneflies

Related Terms

• Plecoptera
• Perlidae
• Perlodidae
• hemimetabolous
• benthic zone
• Indicator species
• riparian zone

Usage Notes

Chloroperlidae is one of the largest families of stoneflies but its internal classification remains contested; some molecular studies have suggested paraphyly or questioned placement within Plecoptera, though it is universally treated as a family in current taxonomy. The common name 'green stoneflies' can be misleading—coloration varies to yellow, and not all green stoneflies belong to this family (e.g., some Perlidae are green). In biomonitoring protocols, Chloroperlidae nymphs are typically classified as 'intolerant' taxa, with their presence signaling high water quality.