Brush-legged
Guides
Isonychiidae
Brush-legged Mayflies
Isonychiidae is a monogeneric family of mayflies containing the single extant genus Isonychia Eaton, 1871, with approximately 37 species distributed across the Holarctic and Oriental regions. The family is characterized by distinctive brush-like or hairy legs in the adult stage, giving rise to the common name "brush-legged mayflies." Species inhabit flowing water habitats, with nymphs occurring on rocky substrates in streams and creeks. The family is among the earliest reported groups of Chinese Ephemeroptera and is relatively abundant at suitable sampling sites.