Martarega membranacea White, 1879

Martarega membranacea White, 1879a: Trans. Ent. Soc. London, 271–272.

Material examined. Laguna Iberá RS: 1 ♂, 1 ♀, artificial channel, 16.ii.2018.

General distribution. Colombia, Guyana, Suriname, Brazil, Ecuador, Bolivia, Argentina (Takiya et al. 2016).

Habitat. This species has been found in lotic habitats (creeks, streams and rivers), and in lentic habitats (ditches, marshes, pools, ponds, lakes and lagoons) including artificial channels and lakes (Truxal 1949; Nieser 1970a, 1975; Pereira & Melo 2007; Barbosa et al. 2012; Barbosa & Giehl 2014). This species has also been taken at lights and in a swimming pool (Barbosa & Rodrigues 2013).

At the INR, only two specimens were collected in an artificial channel with Pontederia crassipes .

Remarks. This is the first record of M. membranacea from INR. This species was previously recorded from Corrientes Province by López Ruf et al. (2003) and Mazzucconi (2008).