Nemouridae
Guides
Amphinemura linda
Amphinemura linda is a species of spring stonefly in the family Nemouridae. It was described by Ricker in 1952. The species is currently considered a synonym of Amphinemura palmeni. It has been recorded from North America, with distribution records from Alberta, Alaska, British Columbia, and Iowa, as well as from Finland.
Malenka
Malenka is a genus of small stoneflies in the family Nemouridae, first described by Ricker in 1952. These insects belong to the suborder Arctoperlaria and are part of the diverse stonefly fauna of North America. Members of this genus are associated with freshwater habitats and are characterized by features typical of the Nemouridae family.
Nemoura trispinosa
Nemoura trispinosa is a stonefly species described by Claassen in 1923, currently treated as a synonym of Nemoura arctica. It belongs to the family Nemouridae, a group of small, generally cold-adapted stoneflies. The species was described from North American material and has been recorded across boreal and arctic regions of the Northern Hemisphere. As a synonym, its biological characteristics are subsumed under the senior name Nemoura arctica.
Nemouroidea
Rolled-winged Stoneflies, Forest Stoneflies, Winter Stoneflies
Nemouroidea is a superfamily of stoneflies (Plecoptera) within the suborder Arctoperlaria, comprising five families: Capniidae (winter stoneflies), Taeniopterygidae, Nemouridae, Notonemouridae, and Leuctridae. These stoneflies are predominantly found in freshwater habitats across the Northern Hemisphere. The group includes notable cold-adapted species such as snow flies that emerge during winter months.
Ostrocerca
forestflies
Ostrocerca is a genus of spring stoneflies (Plecoptera) in the family Nemouridae, containing six described species distributed in eastern North America. Members are small to medium-sized stoneflies commonly known as forestflies. The genus was established by Ricker in 1952. Species are distinguished by subtle morphological differences in wing venation and genitalia.
Ostrocerca albidipennis
white-tailed forestfly, whitetailed forestfly
Ostrocerca albidipennis, commonly called the white-tailed forestfly, is a species of spring stonefly in the family Nemouridae. It was originally described as Nemoura albidipennis by Walker in 1852. The species is found in eastern North America, with records from Connecticut, Maine, Massachusetts, Michigan, and Maryland. As a member of the Nemouridae family, it belongs to the group of small stoneflies commonly known as forestflies.
Ostrocerca complexa
Notched Forestfly
Ostrocerca complexa, commonly known as the notched forestfly, is a species of spring stonefly in the family Nemouridae. First described by Claassen in 1937 as Nemoura complexa, it is now placed in the genus Ostrocerca. It occurs in eastern North America, with documented records from Connecticut, Maine, Massachusetts, New Brunswick, and Nova Scotia.
Ostrocerca prolongata
Bent Forestfly
Ostrocerca prolongata, commonly known as the bent forestfly, is a species of spring stonefly in the family Nemouridae. It was described by Claassen in 1923. The species is found in eastern North America, with records from the northeastern United States and adjacent Canada. Like other members of Nemouridae, it is associated with forested stream habitats.
Ostrocerca truncata
Truncate Forestfly
Ostrocerca truncata, commonly known as the truncate forestfly, is a species of spring stonefly in the family Nemouridae. Originally described as Nemoura truncata by Claassen in 1923, it is one of approximately 50 species in the genus Ostrocerca. The species is found in eastern North America, with records from Connecticut, Indiana, Kentucky, Maine, Massachusetts, and other states. Like other Nemouridae, it is associated with cool, clean streams and emerges in spring.
Paranemoura
Paranemoura is a genus of spring stoneflies in the family Nemouridae, established by Needham & Claassen in 1925. The genus contains at least two described species: P. claasseni (1996) and P. perfecta (1852), the latter commonly known as the spotted forestfly. As members of the order Plecoptera, these insects are aquatic during their immature stages and terrestrial as adults.
Paranemoura perfecta
spotted forestfly
Paranemoura perfecta, commonly known as the spotted forestfly, is a species of spring stonefly in the family Nemouridae. It was first described by Walker in 1852 under the basionym Nemoura perfecta. The species is found in eastern North America, with documented records from Connecticut, Maine, Massachusetts, Michigan, and Maryland. As a member of the Nemouridae, it belongs to the group of spring stoneflies characterized by small size and cold-water habitat associations.
Podmosta
spring stoneflies
Podmosta is a genus of spring stoneflies in the family Nemouridae, comprising approximately six described species distributed across northern North America and the Russian Far East. The genus is notable for its adaptation to cold climates, including documented embryonic diapause in at least one species. Adults are active in spring, with nymphal development occurring primarily during winter months.
Prostoia
Prostoia is a genus of spring stoneflies in the family Nemouridae, established by Ricker in 1952. The genus contains five described species distributed across North America. Two species have common names: Prostoia completa (central forestfly) and Prostoia similis (longhorn forestfly). Members of this genus are part of the Nemourinae subfamily within the Nemouridae family of stoneflies.
Prostoia similis
Longhorn Forestfly
Prostoia similis, commonly known as the longhorn forestfly, is a species of spring stonefly in the family Nemouridae. It is found in North America, with records from states including Connecticut, Delaware, Illinois, Indiana, and Kentucky. As a member of the order Plecoptera, it belongs to an ancient group of aquatic insects whose nymphs typically inhabit cool, clean streams.
Shipsa
spring stoneflies
Shipsa is a monotypic genus of spring stoneflies in the family Nemouridae, containing the single species Shipsa rotunda. The genus was described by Ricker in 1952. The sole species has an extensive Nearctic distribution across northern North America, with records from multiple Canadian provinces and US states. Morphological studies indicate little variation in reproductive structures across its wide geographic range.
Shipsa rotunda
Intrepid Forestfly
Shipsa rotunda is a Nearctic stonefly species in the family Nemouridae with an extensive distribution across Canada and the United States. Despite its wide geographic range, the species exhibits remarkably little morphological variation in both males and females. Reproductive terminalia have been examined using scanning electron microscopy from specimens across its range, revealing consistent structural features. The species was originally described as Nemoura rotunda by Claassen in 1923 and later transferred to the genus Shipsa.
Soyedina
Soyedina is a genus of small stoneflies in the family Nemouridae, endemic to the Nearctic region. The genus was originally described as a subgenus of Nemoura by Ricker in 1952 and elevated to full genus status by Illies in 1966. It currently contains 11 described species, many of which are difficult to distinguish without examination of male genitalia. Species are distributed across North America from the Appalachian Highlands to western North America.
Soyedina nevadensis
Nevada Forestfly
Soyedina nevadensis is a species of stonefly in the family Nemouridae, commonly known as the Nevada Forestfly. It was described by Claassen in 1923. The species belongs to the order Plecoptera, a group of aquatic insects whose nymphs typically inhabit cold, clean streams.
Visoka
Visoka is a genus of small winter stoneflies in the family Nemouridae, established by Ricker in 1952. These insects are part of the order Plecoptera, a group of aquatic insects whose nymphs inhabit cold, well-oxygenated freshwater environments. The genus has been recorded from western North America including Alberta, Alaska, British Columbia, California, and Idaho. As with other nemourids, adults are typically small with reduced wing venation.
Visoka cataractae
Cataract Forestfly
Visoka cataractae is a species of stonefly in the family Nemouridae, commonly known as the Cataract Forestfly. It is a small, winter-emerging stonefly distributed across western North America from Alaska to California. The species was originally described as Nemoura cataractae by Neave in 1933 before being transferred to the genus Visoka. Like other nemourids, it is associated with forested stream habitats.
Zapada
forestflies, spring stoneflies, little brown stoneflies
Zapada is a genus of small spring stoneflies in the family Nemouridae, commonly known as forestflies or little brown stoneflies. The genus contains at least 10 described species distributed across western North America, from Alaska and the Rocky Mountains to California. Adults are 5–8 mm in body length and emerge in early spring, often February through April depending on elevation and species. Nymphs are aquatic shredders that process leaf litter and other organic matter in cold, well-oxygenated streams.
Zapada cordillera
Cordilleran Forestfly
Zapada cordillera is a species of spring stonefly in the family Nemouridae, commonly known as the Cordilleran Forestfly. Described in 1971 from specimens in the western United States, this small aquatic insect is part of a genus whose nymphs are characterized by distinctive branched cervical gills retained into adulthood. As a member of the Nemouridae, it contributes to stream ecosystem function as a leaf-shredding detritivore and serves as an indicator of water quality in its montane habitat.
Zapada frigida
Frigid Forestfly
Zapada frigida is a species of spring stonefly in the family Nemouridae, commonly known as the Frigid Forestfly. Like other members of the genus Zapada, adults retain diagnostic branched cervical gills from the nymphal stage, with two sets of branched gills on each side of the body. The species has been documented from western North America including Alberta, Alaska, British Columbia, California, and Colorado.