Buenoa unguis Truxal, 1953

Buenoa unguis Truxal, 1953: Univ. Kansas Sci. Bull., 1476–1479.

Material examined. Yahaveré RS: 1 ♂, 2 ♀, Medina Lagoon, 13.xii.2014.

General distribution. Venezuela, Brazil, Peru, Bolivia, Paraguay, Argentina (Barbosa & Nessimian 2013).

Habitat. Very little information exists regarding the habitat associations of B. unguis . It has been collected from rivers, ponds, as well as in stagnant pools along dry streams and streamlets (Truxal 1953; Melo & Nieser 2004; Barbosa & Nessimian 2013). This species has also been taken at lights and collected in fish tanks (Barbosa & Nessimian 2013).

At the INR, only three specimens were collected from the margins of the Medina Lagoon, in shallow waters with submerged, emergent, and floating vegetation.

Remarks. The collection of B. unguis from INR represents the first record from Corrientes Province.