Description: Small water strider, 4 mm (0.16 in.) in length, with broad shoulders, dark brown to black in color. Adults have shorter legs, and are usually wingless. Members of this genus have one-segmented tarsi (one segment at the tip of the leg) with tufts of hair that enables them to move about without breaking the surface of the water. They are gregarious and often found in large numbers.
Diet: Feed on various small insects.
Habitat: On the water surface, inhabit swift riffle reaches of the upper Muddy River and its tributaries.
Range: Endemic to the Moapa area, Clark County, Nevada.
Comments: This species is also known as Moapa Skater.