Atractus stygius Passos et al., 2019

Type locality. Bocaiúva hydroelectric power plant, Rio Cravari (not “Craveri”), Brasnorte, state of Mato Grosso, Brazil .

Distribution. Endemic to Brazil (Plt. 182A), recorded in western Cerrado and its contact with Amazonia and Chiquitano Dry Forest (Plt. 182A) at low to intermediate elevations of the Pareci Plateau (Plt. 182B). No detailed field data on habitat use are available for this species.