68103 Crenicichla tuca Piálek, Dragová, Casciotta, Almirón & Říčan, 2015 Cichlidae Cichlids Cichlinae Cichliformes Teleostei South America: Lower Iguazú River basin above the Iguazú Falls in Argentina. Distributional range extends upstream of the Misiones Province, Argentina into the neighboring state of Paraná, Brazil. MLP 10818 (ex MACNict 9522) 25 S 53 W 2010 Crenicichla tuca