Pseudacanthicus pitanga is a species of catfish in the family Loricariidae. It is native to South America, where it occurs in the Tocantins River basin in Brazil. The species reaches 30 cm (11.8 inches) SL. It was described in 2015 by Carine C. Chamon of the Federal University of Tocantins on the basis of distinctive coloration and morphology. Its specific epithet, pitanga, is derived from a Tupi-Guarani word meaning "red", in reference to the color of the species' fins.