“…After a few days, the fish were transferred to 70% ethanol in the laboratory and deposited in the Ichthyological Collection of the Research Centre in Limnology, Ichthyology, and Aquaculture (NUP, Maringá). The identification of taxa was based on original descriptions or study material from the streams of the following basins: Das Cinzas River (Frota et al, 2020; Galindo et al, 2020); Iguaçu River (Baumgartner et al, 2012; Mezzaroba et al, 2020); Itararé River (Cetra et al, 2016; Frota et al, 2020); Ivaí River (Frota et al, 2016a); Piquiri River (Cavalli et al, 2018); Ribeira de Iguape River (Oyakawa et al, 2006; Frota et al, 2019); and Tibagi River (Hoffmann, Nascimento & Shibatta, 2015; Claro‐Garcia, Assega & Shibatta, 2018). In addition, several identifications were confirmed by experts in each taxonomic group.…”