Overview
Very slender, dull coloured, medium sized to large damselflies. The family is confined to Australia, New Guinea and New Caledonia. The wings are narrow with a regular pattern of rectangular cells and no intercalary veins in the outer wing. The anal vein is entirely absent and Cu is between one and several cells long. The larval caudal gills are long, divided into two parts by a distinct central constriction, and have pointed tips.
All species are stream-dwelling or riverine. There are 15 Australian species in 7 genera. They do not occur in the south west of WA, but every other region has at least one species, although finding them can be difficult because they fly close to the water surface and keep to the shade.