Author: Piálek, Říčan, Casciotta & Almirón, 2010
Comments: The arroyo Piray-Miní, the type and only-known locality, has clear and rapidly flowing water; depth is variable, 0.20 to 1.40 m, and the bottom consists of mud, sand, and mostly stones, with some areas having scarce submerged vegetation (Ref. 84540).