Author: Birindelli, Fayal & Wosiacki, 2011
Comments: Like its congeners, this species was usually collected in swift water over sand beaches at night.  It has been considered that specimens of <i>Hassar orestis</i>(=<i>Hassar gabiru</i>) collected at the Volta Grande rapids have preference for benthic invertebrates and detritus (Ref. 87857).