Original description as Crenicichla iguassuensis:
- Haseman, John D.. 1911. "An annotated catalog of the cichlid fishes collected by the expedition of the Carnegie Museum to central South America, 1907-10". Annals of the Carnegie Museum. pp. 329-373 (crc00340)
Conservation: Crenicichla iguassuensis is not evaluated by the international union for the conservation of nature in the iucn red list of threatened species.