Říčan, O.; Piálek, L.; Almirón, A.; Casciotta, J. Description of Two New Species Forming a Sympatric Species Pair of Crenicichla (Teleostei: Cichlidae) Endemic to the Piray Guazú River in the Paraná River Basin, Misiones, Argentina and Belonging to the C. Mandelburgeri Species Complex. EJT 2023, 879, 38–63.