Říčan, O., Piálek, L., Almirón, A. and Casciotta, J. 2023. 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. European Journal of Taxonomy. 879, 1 (Jul. 2023), 38–63. DOI:https://doi.org/10.5852/ejt.2023.879.2159.