Ribeirão das Lajes is a stream winding through the cerrado landscape of Goiás State, Brazil, situated within the upper rio Tocantins basin. Positioned at approximately 16°19′S, 49°31′W, this waterway flows through a region characterized by the rich biodiversity typical of Brazil's central plateau. As a tributary system connected to the broader rio das Almas and rio Maranhão drainages, Ribeirão das Lajes sits at elevations around 580–615 meters above sea level, giving it the character of a mid-elevation cerrado stream with runs, bedrock sections, and pool habitats that support a surprisingly diverse fish community.