Erythrolamprus semiaureus (Cope, 1862)

Type locality. “ Paraguay,” probably from the mouth of the Paraguay River according to Gans, 1964. See also Giraudo et al., 2006.

Distribution. Known from Argentina, Brazil, Paraguay, and Uruguay, at the southern portion of the South American open diagonal (Plt. 385A). In Brazil, widespread in Pampas Grasslands, with marginal records in the Atlantic Forest (Plt. 385A), mostly at low elevations (Plt. 385B). Previous map and taxonomy in Giraudo et al. (2006). Observed in the field in seasonally flooded grassland (Giraudo et al., 2006; Arzamendia and Giraudo, 2009; Quintela et al., 2011a; Santos et al., 2010) and grassland (Cacciali et al., 2016).