Author: (Almaça, 1967)
Comments: Inhabits middle course of large, deep rivers with slow current (Ref. 59043).  Also occurs in water bodies on low-lying plains, with little current.  Feeds on invertebrates and plants (Ref. 26100) and detritus (Ref. 59043).  Threatened by habitat destruction, pollution and introduction of other species (Ref. 26100).  Size reaches up to about 40 cm SL (Ref. 59043).