Pseudacanthicus pitanga[1] 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.

[2] It was described in 2015 by Carine C. Chamon of the Federal University of Tocantins on the basis of distinctive coloration and morphology.

[3] Its specific epithet, pitanga, is derived from a Tupi-Guarani word meaning "red", in reference to the color of the species' fins.

[2] P. pitanga appears in the aquarium trade, where it is often referred to either as the red-fin cactus pleco or by its associated L-number, which is L-024.