Parastegophilus

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

Species
There are currently two recognized species in this genus:
 * Parastegophilus maculatus (Steindachner, 1879)
 * Parastegophilus paulensis (Miranda-Ribeiro, 1918)

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. Parastegophilus species grow to about 5.4 - 6.0 cm in length. P. maculatus enters the gill chamber of the catfish Luciopimelodus pati and feeds on the gills.