Nerthra gaucha Estévez & Schnack, 1981

Nerthra gaucha Estévez & Schnack, 1981: Revta. Soc. Ent. Arg., 59–61.

General distribution. Brazil, Argentina (Moreira et al. 2011b).

Habitat. Knowledge regarding this species is based on only a few specimens (Estévez & Schnack 1981; Estévez et al. 2003, 2010). Nothing is known about its habitat associations, except that it was found in the INR, moving or resting among the flooded grass, aquatic rooted plants, or on the bottom in the Laguna Iberá (Estévez et al. 2010). They were also observed submerged, walking or resting among the aquatic plants or on the bottom, and swimming on the water surface with their fore legs folded and propelled by their middle and hind legs (Estévez et al. 2003, 2010).