Retroculus is a genus of cichlids native to tropical South America, where three are native to rivers in southeastern Amazon Basin in Brazil, while the final is native to rivers in Amapá (Brazil) and French Guiana. It is the sole genus included in the subfamily Retroculinae. These rheophilic cichlids are superficially similar to Geophagus.
Species taxanomy provided by GBIF Secretariat (2022). GBIF Backbone Taxonomy. Checklist dataset https://doi.org/10.15468/39omei accessed via GBIF.org on 2023-06-13; License: CC BY 4.0