Lygophis anomalus (Günther, 1858)

Type locality. Banks of the Paraná River, probably near Santa Fé, Argentina (Dixon, 1985) .

Distribution. Known from Argentina, Uruguay, and Brazil, mostly at the southern portion of the South American open diagonal (Plt. 390A). In Brazil, restricted to Pampas Grasslands (Plt. 390A) at low elevations (Plt. 390B). Previous map and taxonomy in Dixon (1989). Observed in the field in grassland, savanna, and open forest, as well as in disturbed areas (Arzamendia and Giraudo, 2002; Santos et al., 2005; Kacoliris, 2006).