Leuctridae

Leuctridae nymphs are important components of the benthos of small to medium creeks throughout Pennsylvania; 13 species in 4 genera are present. The most common Pennsylvania species is Leuctra ferruginea (Walker) . Adult L. duplicata Claassen, L. sibleyi Claassen, L. tenuis (Pictet), and Paraleuctra sara (Claassen) are also commonly collected in Pennsylvania. Most of the Pennsylvania species are acid tolerant (Earle 2004b).