Pseudacanthicus histrix

Pseudacanthicus histrix is a species of armored catfish endemic to Brazil where it occurs in the Negro and Amazon Basins. This species grows to a length of 90 centimetres (35 in) TL. 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 species.