Parastegophilus is a genus of pencil catfishes native to South America.

There are currently two recognized species in this genus:[1] P. maculatus originates from the lower Paraná and Uruguay River basins in Argentina, Brazil, and Uruguay, while P. paulensis is from the upper Paraná River basin in Brazil.

[2] Parastegophilus species grow to about 5.4–6.0 centimetres (2.1–2.4 inches) in length.

[3][4] P. maculatus enters the gill chamber of the catfish Luciopimelodus pati and feeds on the gills.

This Trichomycteridae-related article is a stub.