Author: Wingert, Ferrer & Malabarba, 2017
Comments: Collected from reservoirs or immediately downstream of three Hydroelectric Power Plants of the rio Uruguay basin (Itá, Machadinho and Monjolinho).  Occurs sympatrically with <i>O. bonariensis</i> (Valenciennes) and <i>O. humensis</i> de Buen in the upper rio Uruguay (Ref. 116661).