Author: Durbin, 1918
Remark: For taxonomic remarks, see Géry (1964: 9-10).
Comments: Usually inhabits slow flowing, low-gradient streams and small rivers.  Also found in floodplain lakes associated with white-water rivers in central Amazon.  An ubiquitous and abundant species in lagoons and riverine habitats across a piedmont/lowland river stretch in río Napo basin in Amazonian Ecuador (Ref. 96864).  Maximum length questionable (Ref. 38376).