Photo by Drees. Adults are rather soft bodied, elongate, and have two pairs of wings which may be highly pigmented and are folded over the back when at rest. The hind wing is quite wide and is folded fan-like over the back. The head bears long slender antennae. The head has widely separated eyes, long slender antennae and chewing mouthparts.
Legs are long and end in two claws.
They have gills that are finger-like or filamentous and may be branched. Gills are usually found at the base of the legs but may also be found on other parts of the head and thorax. There are only about 20 species of stoneflies known in Texas. Mating takes place on the ground or on vegetation. Naiads develop in the water and may take from three month to one year or more.