Rivers
Guides
Acroneuria
common stoneflies
Acroneuria is a genus of large-bodied stoneflies in the family Perlidae, containing more than 30 described species distributed across North America and Asia. Nymphs are predatory and inhabit streams and rivers, where they serve as important bioindicators of water quality. Adults are known for distinctive emergence behaviors, including arboreal emergence in some species. Several species in the genus are experiencing range contractions and population declines due to habitat degradation and climate change.
Hypolestidae
Hypolestidae is a family of damselflies in the order Odonata and suborder Zygoptera. The living family is represented by the genus Hypolestes, whose species are associated with the Caribbean, including islands of the Greater Antilles. Accounts describe these damselflies from forested streams and rivers. The family is distinctive among damselflies because its members are reported to hold their clear wings open while resting.
Neoephemeridae
large squaregill mayflies
Neoephemeridae is a small family of mayflies in the suborder Furcatergalia, containing approximately 13-17 described species across four genera: Neoephemera (Nearctic), Ochernova (Central Asia), Leucorhoenanthus (West Palearctic), and Potamanthellus (East Palearctic and Oriental). Nymphs are characterized by distinctive fimbriate (fringed) dorsal-oriented gills on abdominal segments, giving rise to the common name "large squaregill mayflies." The family has a disjunct Holarctic-Oriental distribution with recent findings in southwestern and northwestern China linking previously isolated genera biogeographically.
Platycnemididae
Platycnemididae is a family of damselflies in the superfamily Coenagrionoidea. Its living members occur across the Old World, with notable diversity in Africa, Asia, and the western Pacific. The family contains more than 400 species and includes several lineages that were formerly treated in Protoneuridae. Many members are linked with flowing freshwater, although the family is diverse in form and does not share one defining adult appearance.