Hisonotus armatus
Hisonotus armatus is a species of catfish in the family Loricariidae. It is native to South America, where it occurs in the Lagoa [dos Patos] basin in Brazil. The species is found in slow and moderate-flowing waters over sandy substrates with submerged or marginal vegetation. It reaches 6 cm in total length and is noted to be sympatric with the species Hisonotus laevior throughout its distribution.