Karyotype uniformity in populations of the endemic Hemiancistrus fuliginosus (Loricariidae: Hypostomini) collected in the upper and middle Uruguai River. - Thums Konerat, Jocicléia; Bueno, Vanessa; de Brito Portela-Castro, Ana Luiza; Cristina Martins-Santos, Isabel; Pavan Margarido, Vladimir (Neotropical Ichthyology, 2025)