Leaf-packs
Guides
Peltoperla
Peltoperla is a genus of stoneflies in the family Peltoperlidae, found in Appalachian headwater streams of eastern North America. Species in this genus have semivoltine life cycles, typically developing over two years with egg diapause periods of approximately six months. Nymphs are strongly associated with leaf pack habitats in small forested streams. The genus exhibits 'leaky' cohort dynamics, where some individuals complete development in one year while others take two years, resulting in overlapping generations and high gene flow among cohorts.