Atractus thalesdelemai Passos et al., 2005

Type locality. Fazenda da Brigada Militar, Passo Fundo, state of Rio Grande do Sul, Brazil .

Distribution. Known from two records, in Brazil and Paraguay (Plt. 185A). In Brazil, restricted to the southern portion of the Atlantic Forest, near its contact with the Araucaria Forest (Plt. 185A), at low to intermediate elevations (Plt. 185B). No detailed field data on habitat use are available for this species.