Pseudacanthicus histrix

Not to be confused with Acanthicus hystrix.

Pseudacanthicus histrix is a large species of armored catfish endemic to Brazil where it occurs in the Rio Negro and lower Amazon basins.^[1] This species grows to a total length of 90 cm (3 ft).^[1] P. histrix has incredibly elongated odontodes that form a brush on the anterior margin of the pectoral fin spine in breeding males; however, sexual dimorphism has not been reported for the other Pseudacanthicus species.^[2]

Pseudacanthicus histrix
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Siluriformes
Family:	Loricariidae
Subfamily:	Hypostominae
Tribe:	Ancistrini
Genus:	Pseudacanthicus
Species:	P. histrix
Binomial name
Pseudacanthicus histrix (Valenciennes in Cuvier & Valenciennes, 1840)
Synonyms
Rinelepis histrix Valenciennes, 1840 Loricaria histrix Vandelli, 1840 Loricaria spinosae Ferreira, 1922