Karst-streams

Guides

• Allocapnia

  winter stoneflies

  Allocapnia is a genus of small winter stoneflies in the family Capniidae, comprising at least 40 described species. Adults emerge during winter months, typically from December through March. Nymphs inhabit stream substrates and exhibit vertical movement within the hyporheic zone, often retreating to deeper substrate during summer diapause and returning to surface layers in autumn.

  PlecopteraCapniidaewinter-stoneflyunivoltinediapausehyporheicbenthicbioindicatorNorth-Americakarst-streamsemergent-aquatic-insect

• Allocapnia recta

  Eastern Snowfly

  Allocapnia recta, commonly known as the eastern snowfly, is a small winter stonefly in the family Capniidae. The species exhibits a univoltine slow-season life cycle with adult emergence occurring during January-February. It inhabits karst headwater streams, where it has been observed at higher densities in intermittent flow sections compared to permanent flow sections. The species is found in eastern North America.

  PlecopteraCapniidaewinter-stoneflykarst-streamsintermittent-streamsunivoltine