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These small stoneflies can reach a length of 5–13 millimetres (0.20–0.51 in), but most of the species are less than 1 centimeter. The wings are slender and cylindrical, usually dark-brown. At the rest the wings appear wrapping the bodies. The adults develop in early spring, swarm, mate and lay the eggs in the water. The slender yellowish larvae are herbivorous, feeding on plants and organic waste.
They have a mainly Holarctic distribution.
List of subfamilies, tribes and genera
- †Lycoleuctra Sinitshenkova, 1987 (fossil)
Leuctrinae Klapálek 1905
- Leuctrini Klapálek 1905
- Tyrrhenoleuctra Consiglio, 1957
Megaleuctrinae Zwick 1973
- Megaleuctra Neave, 1934
- Nelson, C. H. and J. F. Hanson. 1973. The genus Perlomyia (Plecoptera: Leuctridae). J. Kansas Entomol. Soc. 46: 187-199.
- Ricker, W. E. and H. H. Ross. 1969. The genus Zealeuctra and its position in the family Leuctridae(Plecoptera: Leuctridae). Canad. J. Zool. 47: 1113-1127.
- Shepard, W. D. and R. W. Baumann. 1995. Calileuctra, a new genus, and two new species of stoneflies from California (Plecoptera: Leuctridae). Great Basin Natur. 55: 124-133.