Pareiorhina is a genus of armored catfishes native to South America where they are only found in Brazil.

These species are known to occur at altitudes above 650 metres (2100 ft) in various rivers of the Grande, Paraíba do Sul, São Francisco and Tietê River basins.

[1] Pareiorhina forms a monophyletic subunit with Neoplecostomus within the subfamily Neoplecostominae.

[1] There are currently 7 recognized species in this genus: Pareiorhina species all have lateral borders of the head without developed bristles, a naked abdomen, dorsal plates meeting along the mid-dorsal line between the dorsal and caudal fins, no adipose fin, ventral plates covering the midventral line, and the dorsal portion of body behind dorsal fin flatenned (flat caudal peduncle with a rectangular cross section).

[1] P. brachyrhyncha and P. carrancas are unique in lacking an adipose fin and azygous plates; in loricariids without an adipose fin, it is usually replaced by a series of azygous plates that form a ridge.