Two new species of Hypancistrus (Siluriformes: Loricariidae) from the rio Xingu, Amazon, Brazil. - Melo de Sousa, Leandro; Barbosa de Sousa, Erilda; Ribeiro de Oliveira, Renildo; Sabaj, Mark H.; Zuanon, Jansen; Rapp Py-Daniel, Lúcia (Neotropical Ichthyology, 2025)